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Enantioselective intramolecular C–H alkylation of pyridine derivatives with alkene by rare-earth catalysts:Facile synthesis of chiral tetrahydro-1,5-naphthyridines 认领 引用 被引量：1
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作者 Jing Zhang Lichao Ning +6 位作者 Yong Qiu Minghui Ji Shiyu Wang Yuji Wang Fei Wang Xiaoming Feng Shunxi Dong 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第5期283-288,共6页
Chiral 1,2,3,4-tetrahydro-1,5-naphthyridines are frequently encountered in many bioactive compounds.However,the methods for their asymmetric synthesis are quite limited.Herein,we developed a straight-forward and effic... Chiral 1,2,3,4-tetrahydro-1,5-naphthyridines are frequently encountered in many bioactive compounds.However,the methods for their asymmetric synthesis are quite limited.Herein,we developed a straight-forward and efficient route to enantioenriched tetrahydro-1,5-naphthyridines from pyridine derivatives tethered with alkene moieties(34 examples,up to 99%yield,93%ee).The reaction proceeded via Csp2–H activation pathway initiated by site-selective deprotonation with the assistance of La[N(SiMe3)2]3/Py Box,followed by alkene insertion into the resulting La-aryl bond.The potential utility of the current method in organic synthesis was highlighted by scale-up synthesis of chiral product and its further transformations.Moreover,some of the products show a pronounced inhibitory effect on A549 cell activity.In addition,experimental studies and DFT calculations were carried out to elucidate the origin of enantiocontrol. 展开更多
关键词 Asymmetric catalysis Rare-earth C-H activation Pyridine Alkylation Tetrahydro-1,5-naphthyridine
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Regulatory effects of coronene and pyridine on the self-assembly structure of tetracarboxylic acid derivative formed by dimeric building blocks 认领 引用
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作者 Linlin Gan Xuan Peng +5 位作者 Wenchao Zhai Cheng Zhang Xinyu Duan Ke Deng Wei Li Qingdao Zeng 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第3期711-715,共5页
The regulation of guest molecules on the self-assembly system of tetracarboxylic acid derivative(H4BDETP)at the liquid/solid interface was studied by scanning tunneling microscopy(STM)and density functional theory(... The regulation of guest molecules on the self-assembly system of tetracarboxylic acid derivative(H4BDETP)at the liquid/solid interface was studied by scanning tunneling microscopy(STM)and density functional theory(DFT)calculations.Coronene(COR)guest molecules induced H4BDETP to transform from linear assembly structure to diversified nanoporous structures in which COR could be captured.And the regulation of pyridine guest molecules(DPE,BPYB,TYPY)on the mono-component assembly structure of H4BDETP was achieved by forming O-H…N hydrogen bonds with H4BDETP.The introduction of both COR and pyridine derivatives could destroy the hydrogen-bonded dimers of H4BDETP,and new O-H…O hydrogen bonds were formed between H4BDETP molecules.In addition,H4BDETP/pyridine co-assembly structures depended on the central bridging units and the number of pyridine groups in pyridine derivatives.Furthermore,H4BDETP/TYPY structure underwent structural transformation induced by COR and multi-component assembly structures with thermodynamic stability were constructed. 展开更多
关键词 Regulation Co-assembly Hydrogen bond Pyridine STM
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Interfacial coordination engineering of CuCOF/CNTs hybrids for selective electrocatalytic CO2reduction 认领 引用
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作者 Jing-Zhou Wang Xiao-Hui Liu +6 位作者 Guo-Sheng Wang Hai-Yang Yu Wen-Yue Lin Shuo-Yun Zheng Hui-Lin Li Can Xue Xian-Tai Zhou 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期437-446,I0011,共10页
The rational design of efficient electrocatalysts for the CO2reduction reaction(CO2RR)requires precise control over active-site accessibility and electronic structure.Covalent organic frameworks(COFs)provide tun... The rational design of efficient electrocatalysts for the CO2reduction reaction(CO2RR)requires precise control over active-site accessibility and electronic structure.Covalent organic frameworks(COFs)provide tunable coordination environments,yet the effect of their anchoring modes on conductive supports remains underexplored.Herein,we investigate CuCOF integrated with carbon nanotubes(CNTs)through three coordination strategies:physical mixing,porphyrin-based linkage,and pyridine coordination.The pyridine-linked CuCOF/CNTs demonstrated superior performance,achieving a faradaic efficiency(FE)of 53.2%for ethanol at-1.1 V vs.RHE with a current density of-24.4 mA/cm2in an H-type cell,and maintained stable operation for over 50 h.In a flow-cell configuration,ethanol selectivity was further enhanced,with a FE of 53.6%and a current density of-86.1 mA/cm2.In situ spectroscopic analyses combined with density functional theory(DFT)calculations revealed that pyridine coordination enhanced interfacial charge transfer,increased the electron density of Cu centers,and lowered the energy barrier for C-C coupling.These findings highlight the critical role of coordination modes at the COF-support interface in steering reaction pathways and provide insights for constructing efficient CO2RR catalysts. 展开更多
关键词 CuCOF Anchoring strategies CO2reduction reaction Interfacial electronic modulation Pyridine coordination
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A Green and Mild One-Pot Protocol for the Synthesis of 3-lodo-/Bromo-imidazo[1,2-a]pyridines without Transition Metals 认领 引用
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作者 Yang Liting Pan Huiru +6 位作者 Xu Xiaoxu Zhang Yikai Lai Shuyu Cao Xinyu Liu Guoqun Qiao Huijie Jiao Mingli 《有机化学》 SCIE CAS CSCD 北大核心 2026年第3期915-924,共10页
A transition-metal-free one-pot multi-step strategy has been established for the efficient synthesis of 3-iodoimidazo[1,2-a]pyridine derivatives,utilizing 2-aminopyridines,formyl methyl bromides,and potassium iodide(K... A transition-metal-free one-pot multi-step strategy has been established for the efficient synthesis of 3-iodoimidazo[1,2-a]pyridine derivatives,utilizing 2-aminopyridines,formyl methyl bromides,and potassium iodide(KI)as reactants.This protocol boasts notable advantages:freedom from transition metals,mild reaction conditions(proceeding at room temperature),and employment of green,non-toxic iodinating reagents.Notably,2-aminopyridines and formyl methyl bromides substituted with both electron-donating groups(EDGs)and electron-withdrawing groups exhibit good compatibility,and substrates substituted with EDGs generally afford slightly higher yields.Mechanistic investigations through control experiments demonstrate that the reaction follows a two-step mechanism:initially,2-aminopyridine reacts with formyl methyl bromide to form an imidazo[1,2-a]pyridine intermediate,which then undergoes C3-iodination with KI.Furthermore,this strategy is extendable to the synthesis of 3-bromoimidazo[1,2-a]pyridines by using potassium bromide(KBr)as the bromine source under adjusted conditions(65 C,6 h),yielding products with 55%~97%yields. 展开更多
关键词 imidazo[1,2-a]pyridine one-pot multi-step reaction iodination reaction transition-metal-free potassium iodide
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Degradation performance and mechanism of pyridine and 2-diethylamino-4‑hydroxy-6-methylpyrimidine by Pandoraea captiosa HR2 in individual or simultaneous systems 认领 引用
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作者 Hongyu Niu Wencong Lin +4 位作者 Songyan Zhu Weitao Liu Shiqiang Tian Haijun Yang Rilong Zhu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第6期316-325,共10页
Nitrogen-containing heterocyclic compounds(NHCs)are common in wastewater from pesticide,pharmaceutical,and fine chemical industries.With structural stability and inherent toxicity,these compounds resist biodegradation... Nitrogen-containing heterocyclic compounds(NHCs)are common in wastewater from pesticide,pharmaceutical,and fine chemical industries.With structural stability and inherent toxicity,these compounds resist biodegradation and pose ecological risks.Although microbial degradation of individual NHCs has been studied,the codegradation mechanisms of mixed NHCs remain unclear,limiting their application in wastewater treatment.In this study,a bacterial strain capable of efficiently degrading both pyridine and 2-diethylamino-4‑hydroxy-6-methylpyrimidine(DHMP)was isolated from aerobic activated sludge obtained at a pesticide wastewater treatment plant and was identified as Pandoraea captiosa HR2.In the dual-substrate system,strain HR2 achieved degradation rates of 97.61%±0.55%for pyridine and 96.89%±0.68%for DHMP(each at an initial concentration of 400 mg/L)after 96 h of incubation.Two novel metabolic intermediates,(1E,2E)-N-methylbut-2-enamide and diethylamine,were identified during DHMP degradation,shedding light on the metabolic pathways involved.Compared to the single-substrate system,pyridine degradation in the dual-substrate system was only slightly inhibited,whereas DHMP degradation was significantly suppressed.Transcriptomic analysis revealed substantial downregulation of two key DHMP degradation genes(rutA and preT)in the dual-substrate system,suggesting substrate-induced metabolic competition.Additionally,genes involved in nitrogen metabolism,2-oxocarboxylic acid metabolism,the tricarboxylic acid(TCA)cycle,and thiamine metabolism were less upregulated than in the single-substrate system,which may further contribute to the reduced DHMP degradation efficiency.This study reveals the potential mechanisms underlying strain HR2-mediated degradation of pyridine and DHMP,offering microbial resources for the treatment of their combined pollution in wastewater. 展开更多
关键词 Pyridine 2-diethylamino-4‑hydroxy‑6-methylpyrimidine Biodegradation Co-metabolic mechanism Transcriptomic analysis
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Co-regulation effect of solvation and interface of pyridine derivative enabling highly reversible zinc anode 认领 引用 被引量：1
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作者 Binrui Xu Guangbin Wang +3 位作者 Yong Liu Quanan Li Fengzhang Ren Jianmin Ma 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第1期1-9,共9页
The poor reversibility and stability of Zn anodes greatly restrict the practical application of aqueous Zn-ion batteries(AZIBs),resulting from the uncontrollable dendrite growth and H2O-induced side reactions durin... The poor reversibility and stability of Zn anodes greatly restrict the practical application of aqueous Zn-ion batteries(AZIBs),resulting from the uncontrollable dendrite growth and H2O-induced side reactions during cycling.Electrolyte additive modification is considered one of the most effective and simplest methods for solving the aforementioned problems.Herein,the pyridine derivatives(PD)including 2,4-dihydroxypyridine(2,4-DHP),2,3-dihydroxypyridine(2,3-DHP),and 2-hydroxypyrdine(2-DHP),were em-ployed as novel electrolyte additives in ZnSO4electrolyte.Both density functional theory calculation and experimental findings demonstrated that the incorporation of PD additives into the electrolyte effectively modulates the solvation structure of hydrated Zn ions,thereby suppressing side reactions in AZIBs.Ad-ditionally,the adsorption of PD molecules on the zinc anode surface contributed to uniform Zn deposi-tion and dendrite growth inhibition.Consequently,a 2,4-DHP-modified Zn/Zn symmetrical cell achieved an extremely long cyclic stability up to 5650 h at 1 mA cm-2.Furthermore,the Zn/NH4V4O10full cell with 2,4-DHP-containing electrolyte exhibited an outstanding initial capacity of 204 mAh g-1,with a no-table capacity retention of 79%after 1000 cycles at 5 A g-1.Hence,this study expands the selection of electrolyte additives for AZIBs,and the working mechanism of PD additives provides new insights for electrolyte modification enabling highly reversible zinc anode. 展开更多
关键词 Zn anode Pyridine derivative Electrolyte additive Solvation regulation Interface modification
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Strategic modulation of CoFe sites for advanced bifunctional oxygen electrocatalyst 认领 引用
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作者 Juhong Zhou Hui Zhao +7 位作者 Ping Han Ziyue Wang Yan Zhang Xiaoxia Mao Konglin Wu Shengjue Deng Wenxiang He Binbin Jiang 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2025年第1期57-62,共6页
An effective strategy of regulating active sites in bifunctional oxygen electrocatalysts is essentially desired,especially in rechargeable metal-air batteries(RZABs).Herein,a highly efficient electrocatalyst of CoFe a... An effective strategy of regulating active sites in bifunctional oxygen electrocatalysts is essentially desired,especially in rechargeable metal-air batteries(RZABs).Herein,a highly efficient electrocatalyst of CoFe alloys embedded in pyridinic nitrogen enriched N-doped carbon(CoFe/P-NC)is intelligently constructed by pyrolysis strategy.The high concentration of pyridinic nitrogen in CoFe/P-NC can significantly reprogram the redistribution of electron density of metal active sites,consequently optimizing the oxygen adsorption behavior.As expected,the pyridinic nitrogen guarantees CoFe/P-NC providing the low overpotential of the overall oxygen electrocatalytic process(ΔEORR-OER=0.73 V vs.RHE)and suppresses the benchmark electrocatalysts(Pt/C&RuO2).Assembled rechargeable Zn-air battery using CoFe/P-NC demonstrates a promising peak power density of 172.0 mW cm-2,a high specific capacity of 805.0 mAh g-1Zn and an excellent stability.This work proposes an interesting strategy for the design of robust oxygen electrocatalysts for energy conversion and storage fields. 展开更多
关键词 Bifunctional oxygen electrocatalyst Bimetallic alloys Pyridinic nitrogen Zn-air battery
[1,2,4]Triazolo[1,5-a]pyridine as regulating unit with high horizontal orientation for efficient non-doped blue OLEDs with negligible efficiency roll-off 认领 引用
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作者 Guoxi Yang Hongji Tan +6 位作者 Jieji Zhu Qingxiao Tong Jingxin Jian Zhihai Yang Deli Li Denghui Liu Shijian Su 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第8期585-590,共6页
Abundant efforts have been devoted to improving the efficiency of organic light-emitting diodes(OLEDs),however,approaches to control the device efficiency roll-off are still extremely limited,especially in nondoped bl... Abundant efforts have been devoted to improving the efficiency of organic light-emitting diodes(OLEDs),however,approaches to control the device efficiency roll-off are still extremely limited,especially in nondoped blue OLEDs.In this work,three blue emitters(TAT,TAMT and TAMT-CN)with"hot exciton"properties are designed and synthesized based on[1,2,4]triazolo[1,5-a]pyridine(TP)as a regulating unit as well as anthracene-triphenylamine(An-TPA)as the chromophore.By adjusting the linkage mode and modifying the TP unit,the excited state properties,carrier transfer abilities,horizontal orientation,and device efficiency roll-off were precisely controlled.Among these materials,emitters that directly connect the fused TP unit exhibit balanced charge-transporting ability,higher photoluminescent quantum yield and improved horizontal orientation,resulting in better electroluminescence(EL)performance in non-doped blue OLEDs.As a result,non-doped blue OLEDs exhibit excellent performance with external quantum efficiencies of over 6%,brightness of over 30,000 cd/m2and EL peaks of around 476 nm.More importantly,the device based on TAMT-CN exhibits an ultra-low efficiency roll-off of 2.97%at a high brightness of10,000 cd/m2.The accessible molecular unit and feasible design strategy in this work are of great significance for designing highly efficient and ultra-low efficiency roll-off non-doped blue OLEDs. 展开更多
关键词 Blue OLED [1,2,4]Triazolo[1,5-a]pyridine Negligible efficiency roll-off Hot exciton
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Metal-free construction of diverse 1,2,4-triazolo[1,5-a]pyridines on water 认领 引用
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作者 Chunhua Ma Mengjiao Liu +4 位作者 Siyu Ouyang Zhenwei Cui Jingjing Bi Yuqin Jiang Zhiguo Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第1期244-247,共4页
A transition-metal-and oxidant-free amination/cyclization reaction to access 1,2,4-triazolo[1,5-a]pyridines was realized in water by using amino diphenylphosphinate as amino source.A broad array of readily accessible ... A transition-metal-and oxidant-free amination/cyclization reaction to access 1,2,4-triazolo[1,5-a]pyridines was realized in water by using amino diphenylphosphinate as amino source.A broad array of readily accessible N-(pyridyl)amides could be converted into the products featuring a diverse set of functional groups.The sustainable methodology was successfully applied to the late-stage functionalization of natural products and drugs. 展开更多
关键词 1,2,4-Triazolo[1,5-a]pyridines On water N-(Pyridyl)amides Cyclization Metal-free
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A new pyridine-based porous organic polymer composited high-temperature proton exchange membrane 认领 引用
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作者 Weiyu Zhang Jie Li +8 位作者 Hong Li Yi Tang Tianqi Yang Xiaofei Ye Weiyi Jin Yiming Sun Yicheng Dong Xiangdong Zhang Chenliang Gong 《Materials Reports(Energy)》 EI 2025年第3期77-86,共10页
As promising high-temperature proton exchange membranes,phosphoric acid(PA)doped polybenzimidazole(PBI)membranes still face challenges,including excessive PA leaching and limited long-term stability.The preparation of... As promising high-temperature proton exchange membranes,phosphoric acid(PA)doped polybenzimidazole(PBI)membranes still face challenges,including excessive PA leaching and limited long-term stability.The preparation of mixed matrix membranes(MMMs)has emerged as a viable strategy to address these limitations,which can combine the excellent mechanical properties of polymers with the structural advantages of porous fillers.Among various filler materials,nitrogen-containing porous organic polymers(POPs)have shown particular promise because of their excellent compatibility with polymers.Therefore,in this work,a new pyridine-based POP called Py-POP was synthesized.Py-POP was mixed with commercial poly[2,2′-(p-oxidiphenylene)-5,5′-benzimidazole](OPBI)to prepare MMMs.Theoretical calculations indicate that the pyridine groups exhibit strong interactions with PA,significantly enhancing both PA retention and proton conduction efficiency.Remarkably,the PA retention rate of the composite membrane doped with 10 wt%Py-POP is 77.2%at 80/40%RH,which is much higher than that of the OPBI(62.7%).Furthermore,the membrane achieves an outstanding proton conductivity of 0.173 S cm-1at 180℃,which is 4.2 times higher than that of the OPBI membrane.The peak power density of the composite membrane can achieve 915.1 mW cm-2 and remains at 891.5 mW cm-2 after 80 cycles of testing at 180℃. 展开更多
关键词 High-temperature proton exchange membrane fuel cells Porous organic polymer Pyridine High phosphoric acid retention
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Pyridine-nitrogen conjugated covalent organic frameworks for high-efficiency gas-solid photocatalytic reduction of CO2to CO 认领 引用 被引量：3
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作者 Haicheng Jiang Chi Cao +10 位作者 Wei Liu Hao Zhang Qianyu Li Siyuan Zhu Xiaoning Li Jinshuo Li Jinfa Chang Wei Hu Zihao Xing Xiaoqin Zou Guangshan Zhu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第5期127-135,共9页
The light-driven CO2reduction reaction(CO2RR)to CO is a very effective way to address global warming.To avoid competition with water photolysis,metal-free gas-solid CO2RR catalysts should be investigated.Cova... The light-driven CO2reduction reaction(CO2RR)to CO is a very effective way to address global warming.To avoid competition with water photolysis,metal-free gas-solid CO2RR catalysts should be investigated.Covalent organic frameworks(COFs)offer a promising approach for CO2transformation but lack high efficiency and selectivity in the absence of metals.Here,we have incorporated a pyridine nitrogen component into the imine-COF conjugated structure(Tp Pym).This innovative system has set a record of producing a CO yield of 1565μmol g-1within 6 h.The soft X-ray absorption fine structure measurement proves that Tp Pym has both better conjugation and electron cloud enrichment.The electronic structure distribution delays the charge-carrier recombination,as evidenced by femtosecond transient absorption spectroscopy.The energy band diagram and theoretical calculation show that the conduction-band potential of Tp Pym is lower and the reduction reaction of CO2to CO is more likely to occur. 展开更多
关键词 Light-driven CO2reduction Gas-solid reaction Conjugated pyridine nitrogen Covalent organic framework CO2catalysis to CO
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Development of novel pyridine-based agrochemicals:A review 认领 引用 被引量：4
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作者 Vladimir V.Zakharychev Andrey M.Martsynkevich 《Advanced Agrochem》 CAS CSCD 2025年第1期30-48,共19页
Pyridine-based agrochemical products have become the most commercially successful in the 21st century.About half of the agrochemicals with pyridine scaffold were released,registered or invented only in the current mil... Pyridine-based agrochemical products have become the most commercially successful in the 21st century.About half of the agrochemicals with pyridine scaffold were released,registered or invented only in the current millennium.Some of them have a unique structure and previously unknown modes of action.The literature provides examples of the use of the pyridine ring in pesticides for reducing the dosage of the active ingredient,hence to take care of the environment due to their increased efficacy,overcoming the pest resistance,and also makes it possible to create patentable structures by dodging the parent patent,which sometimes leads to a change in the spectrum of activity of the compounds.The newest 13 substances registered by the ISO from January 2021 to June 2024,and not reviewed previously are considered. 展开更多
关键词 Pyridine Agrochemicals Herbicides Fungicides Insecticides Plant protection
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A Novel Electrolyte Pyridine Additive for Enhancing Cycle Life of Lithium-Ion Batteries 认领 引用 被引量：1
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作者 Peng-Cheng Wang Ding-Chang Li +2 位作者 Jun-Tao Li Guang-Bo Lu Shi-Wen Wang 《电化学（中英文）》 CAS 北大核心 2025年第12期47-59,共13页
Lithium-ion(Li-ion)battery using a graphite(Gr.)anode and a lithium iron phosphate(LiFePO4,LFP)cathode(Gr.||LFP)has been widespread in energy storage.To match the warranty period of energy storage systems,the lifespan... Lithium-ion(Li-ion)battery using a graphite(Gr.)anode and a lithium iron phosphate(LiFePO4,LFP)cathode(Gr.||LFP)has been widespread in energy storage.To match the warranty period of energy storage systems,the lifespan of this kind of Li-ion battery,not only under room temperature but also under relatively high temperature,is critical.Exploration of func-tional electrolyte additive provides an efficient approach to address this issue.This study reports the usage of pyridine(Py)as a new electrolyte functional additive for Gr.||LFP.In the first cycle,it was found that Py can be reduced before ethylene carbonate and vinylene carbonate,forming a dense and homogeneous solid electrolyte interface(SEI)layer containing rich nitrogen and fluorine elements.Owing to the merits of the SEI layer,the parasitic reactions which occur at the graphite anode and consume the active lithium ion during cycling were suppressed.With the amount of 0.5wt%Py additive in the electrolyte,the Gr.||LFP pouch cell achieved a capacity of 3.2 Ah,exhibiting remarkablly enhanced cycling stability and high-temperature storage capability.Under the experimental conditions of 25°C and 0.5 P,the capacity retention of the pouch cell reached 95.64%after 500 cycles,while still maintained 82.75%of the initial capacity after 1000 cycles under 45°C and 1 P.After the 30-day storage at 45°C and 60°C,the capacity retention rates were 87.38%and 80.56%,respectively,which are significantly higher than those of the pouch cells with the blank control electrolyte.This work identifies Py as a highly promising electrolyte additive in stabilizing the graphite-based anode of Li-ion battery under both room temperature and high temperature. 展开更多
关键词 Lithium-ion batteries Cyclability Pyridine additive Solid electrolyte interface
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Catalytic effects of structural design in N-modified carbon materials for the hydrochlorination of acetylene 认领 引用 被引量：1
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作者 Yusheng Lu Chaofeng Huang +1 位作者 Zhigang Lei Mingyuan Zhu 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第8期487-491,共5页
Polyvinyl chloride is the most widely used general-purpose plastic and plays a vital role in various industries.Mercury-based catalysts severely limit the green sustainability of industry.Non-metallic carbon materials... Polyvinyl chloride is the most widely used general-purpose plastic and plays a vital role in various industries.Mercury-based catalysts severely limit the green sustainability of industry.Non-metallic carbon materials are very promising alternatives in acetylene hydrochlorination,but their stability remains a challenge of major concern at present.Based on the principle of green chemistry,structurally tunable and defect-rich carbon materials were synthesized by hydrothermal carbonization and pyrolysis using glucose as carbon source and m-phenylenediamine as nitrogen source and cross-linking agent.Experimental characterization and density functional theory confirmed that pyridinic N was the main active site.The introduction of N not only regulated the formation of the hierarchically porous structure of the carbon material,but also increased the adsorption of HCl and decreased the adsorption strength of C2H2.The synergistic effect of high N content and porous structure significantly enhanced the catalytic performance of the catalysts in acetylene hydrochlorination.The C2H2conversion was maintained at around98%after 100 h under the reaction conditions(T=220°C,GHSV(C2H2)=30 h-1,VHCl/VC2H2=1.15).Thus,the one-pot synthesis process used here is a good benchmark for future catalyst research. 展开更多
关键词 Acetylene hydrochlorination Hierarchically porous structure Structure modulation N-Modified carbon materials Pyridinic N One-pot hydrothermal process
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Synergistic solvent extraction system of bis(pyridin-2-ylmethyl)dodecan-1-amine and dinonylnaphthalene for enhanced selective extraction of nickel and cobalt 认领 引用
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作者 Bharat Prasad Sharma Tianzhang Wang +3 位作者 Yufeng Liang Jinping Xiong Liangrong Yang Zheng Li 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2025年第1期10-18,共9页
Simultaneous recovery of Ni and Co from Fe(Ⅲ)and AI is a critical challenge in hydrometallurgical processes.Recognized solvent extraction systems often struggle with selectivity and effective performance in mixed met... Simultaneous recovery of Ni and Co from Fe(Ⅲ)and AI is a critical challenge in hydrometallurgical processes.Recognized solvent extraction systems often struggle with selectivity and effective performance in mixed metal ion environments.Herein,a new synergistic solvent extraction(SSX)system comprised of a novel pyridine analog,N,N-bis(pyridin-2-ylmethyl)dodecan-1-amine(BPMDA),and dinonylnaphthalene sulfonic acid(DNNSA)with tributyl phosphate as phase modifier is introduced.The SSX system demonstrates high extraction performance achieving>90%for Ni and>97%for Co in a singlestage extraction process,with high selectivity.Under optimal conditions,the selectivity sequence is observed as Co2+(>97%)>Ni2+(>90%)>Mn2+(Fe3+(Mg2+(Al3+(Ca2+(<1%).Spectroscopic analysis evidences the preferential binding of BPMDA with Ni and Co in the presence of DNNSA,concurrently achieving a significant reduction in the co-extraction of Fe(Ⅲ)and Al.The selective complexation of Ni and Co using the SSX system offers a highly efficient and selective approach for their extraction,with promising potential for applications in recovery-based processes. 展开更多
关键词 Nickel and cobalt extraction Synergistic solvent extraction DNNSA Pyridine Hydrometallurgy
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Synthesis and Anti-acute Myeloid Leukemia Activity of Cyclopropane-1,1-diamide Derivatives Containing Imidazo[1,2-a]pyridine 认领 引用
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作者 Wu Lüjia Li Jiangdong +4 位作者 Shi Zhonghua Jin Xin Wang Xianheng Zhao Changkuo Huang Qiang 《有机化学》 SCIE CAS CSCD 北大核心 2025年第1期286-296,共11页
A series of cyclopropane-1,1-diamide derivatives containing imidazo[1,2-a]pyridine were synthesized.The inhibitory effects of these compounds on FLT3-ITD kinase and their anti-proliferative activities against two acut... A series of cyclopropane-1,1-diamide derivatives containing imidazo[1,2-a]pyridine were synthesized.The inhibitory effects of these compounds on FLT3-ITD kinase and their anti-proliferative activities against two acute myeloid leukemia cell lines expressing FLT3-ITD were evaluated.With focused on the different substitutions of imidazo[1,2-a]pyridine,a preliminary exploration of the structure-activity relationship was conducted for 22 compounds.The results revealed that most compounds exhibited certain inhibitory effects on FLT3-ITD kinase with IC50 values below 0.5μmol·L-1.Among them,N-(4-fluorophenyl)-N-(4-(7-((2-morpholinoethyl)carbamoyl)imidazo[1,2-a]pyridine-3-carbonyl)phenyl)cyclopropane-1,1-dicarboxamide(12a)demonstrated the most potent FLT3-ITD kinase inhibitory activity and the strongest anti-proliferative effect on the MV4-11 and MOLM-13 cell lines expressing FLT3-ITD with IC50 values of 0.06 and 0.2μmol·L-1,respectively.Moreover,compound 12a did not exhibit anti-proliferative activity against cell lines without FLT3 mutations,such as THP-1,HCT-116,A549,HepG2,K562,and MCF-7,and it displayed non-cytotoxicity towards normal human renal tubular epithelial cells(HK-2),human liver progenitor cells(HepaRG),and HEK293(human embryonic kidney cells).Although 12a exhibits inferior inhibitory activity against FLT3-ITD kinase and anti-tumor cell proliferation compared to C abozantinib in this study,it can provide a reference for further research into FLT3-ITD inhibitors. 展开更多
关键词 imidazole[1,2-a]pyridine antiproliferative activity inhibition FLT3 kinase acute myeloid leukemia
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Accelerated generation and activation of H2O2 by the synergetic effect of pyridine-N protonation and Co0 species toward efficient electro-Fenton 认领 引用
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作者 Miao Tian Shi-Long Li +7 位作者 Ye Chen Cong-Xin Xia Ya-Xin Guo Jia-Yao Qiu Xu-Po Liu Xin Chen Yang Lu Shi-Xue Dou 《Rare Metals》 SCIE EI CAS CSCD 2025年第10期7418-7429,共12页
Designing highly effective cathodic catalysts that can efficiently generate H2O2in situ and promptly convert it to hydroxyl radicals(·OH)poses a significant challenge within the heterogeneous electro-Fenton... Designing highly effective cathodic catalysts that can efficiently generate H2O2in situ and promptly convert it to hydroxyl radicals(·OH)poses a significant challenge within the heterogeneous electro-Fenton(EF)systems.Herein,we fabricate a bifunctional core-shell catalyst featuring Co0species encapsulated within N,P-codoped carbon shells through a hydrothermal-pyrolysis strategy,utilizing bamboo shoots as biomass-derived precursors.Density functional theory(DFT)calculations elucidate that the protonation of pyridinic nitrogen modifies the adsorption energy of the OOH*intermediate,positioning it optimally at the peak(3.81 eV)on the twoelectron oxygen reduction reaction(2e-ORR)volcano plot,thereby significantly boosting H2O2production.Moreover,the Co0species embedded within the catalyst function as electron donors,catalyzing the activation of H2O2to produce·OH by efficiently facilitating the transfer of electrons to Fe3+.Consequently,the synthesized catalyst exhibits a minimum electron transfer number of 2.06 and a maximum H2O2selectivity of 97.4%.Moreover,the degradation for the methylene blue solution exceeds 95%within 15 min,with only an 11.3%reduction in degradation efficiency after 180 min of continuous operation(9 cycles).This bifunctional catalyst design provides valuable insights that can accelerate the development of EF-based degradation systems. 展开更多
关键词 Electrocatalyst Core-shell structures Two-electron oxygen reduction reaction Pyridinic nitrogen Accelerated reduction of Fe3+
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Cu(Ⅱ) and Cu(Ⅰ) complexes based on derivatives of imidazo[1,5-a]pyridine:Synthesis,structures,in situ metal-ligand reactions,and catalytic activity 认领 引用
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作者 JIA Bofei LIU Zhihao +7 位作者 GAO Zongyuan ZHOU Shuai WU Mengxiang ZHANG Qian ZHANG Xiamei CHEN Shuzhong YANG Xiaohan LI Yahong 《无机化学学报》 SCIE CAS CSCD 北大核心 2025年第5期1020-1036,共17页
Three efficient methods for the synthesis of a series of Cu(Ⅱ) and Cu(Ⅰ) complexes based on imidazo[1,5-a]pyridine derivatives were developed.These methods include the following:(ⅰ)Cu(Ⅱ) salts were used as metal s... Three efficient methods for the synthesis of a series of Cu(Ⅱ) and Cu(Ⅰ) complexes based on imidazo[1,5-a]pyridine derivatives were developed.These methods include the following:(ⅰ)Cu(Ⅱ) salts were used as metal sources and N,N-dimethylformamide was employed as a solvent as well as a reductant to produce Cu(Ⅰ) complexes.(ⅱ) An iodide-containing compound was utilized as a ligand and iodide source to prepare complexes.An in situ metalligand reaction occurred and an iodide-bridged copper complex was generated.(ⅲ) A series of aldehydes were added to the reaction systems to induce in situ metal-ligand reactions between the aldehydes and the imidazo[1,5-a]pyridine derivatives,producing polydentate ligand scaffolds.Eight complexes were prepared and characterized.The catalytic activities of these complexes toward the ketalization of ketones by ethylene glycol were investigated.With the exception of complex4,the remaining seven complexes all showed high catalytic activity.The lower activity of 4 may be due to the larger radius of bridging iodide ions and the shorter Cu(Ⅰ)…Cu(Ⅰ) distance.CCDC:2357696,1·2CH2Cl2;2357697,2;2018292,3;2092192,4;2092190,5;2155557,6;2406155,7;2406156,8·EtOH. 展开更多
关键词 copper complexes imidazo[1,5‑a]pyridine in situ metal-ligand reactions ketalization reactions
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Alumina-Promoted Michael Addition of Imidazo[1,2-a]pyridines with α,β-Unsaturated Ketones 认领 引用
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作者 Sun Yadong Zhou Hai +2 位作者 Zheng Tucai Wang Shoucai Ji Fanghu 《有机化学》 SCIE CAS CSCD 北大核心 2025年第9期3361-3369,共9页
A direct Michael addition reaction between imidazo[1,2-a]pyridines andα,β-unsaturated ketones using acidic alumina as a C(sp3)—H acid catalyst has been developed.The abundant C(sp3)—H acid sites(Al3+)on the aci... A direct Michael addition reaction between imidazo[1,2-a]pyridines andα,β-unsaturated ketones using acidic alumina as a C(sp3)—H acid catalyst has been developed.The abundant C(sp3)—H acid sites(Al3+)on the acidic alumina surface effectively activate the carbonyl group ofα,β-unsaturated ketones,significantly enhancing the electrophilicity of theβ-carbon and thereby facilitating selective alkylation at the C3 position of imidazo[1,2-a]pyridines.This method demonstrates excellent functional group compatibility,mild reaction conditions,low reagent costs,and operational simplicity,providing a novel strategy for the efficient synthesis of alkylated imidazo[1,2-a]pyridine derivatives. 展开更多
关键词 C(sp3)-H acid imidazo[1,2-a]pyridine α,β-unsaturated ketone Michael addition
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Pyridinic nitrogen-substituted graphene membranes for exceptional CO2 capture 认领 引用
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作者 Sushu Zhang Yang Yang Jingyu Wang 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2025年第2期7-9,共3页
With the relentless expansion of human economic activities,a substantial increase in CO2emissions has been observed,primarily stemming from the rampant combustion of fossil fuels.This relentless surge has undeniabl... With the relentless expansion of human economic activities,a substantial increase in CO2emissions has been observed,primarily stemming from the rampant combustion of fossil fuels.This relentless surge has undeniably exacerbated global warming and climate change,necessitating urgent measures to mitigate greenhouse gas emissions[1].The conventional CO2separation technologies required the addition of amine-based absorbents,while their applications were limited by the strong corrosivity,toxic volatiles and by-products,and energy-consuming regeneration process.Recent advancements in membrane technology,including polymer thin film composites,metal-organic frameworks,and stacked nanosheets,have exhibited promising CO2/N2separation performances[2,3].However,the challenge of balancing high selectivity with high permeance remains,due to the inherent limitation of reducing thickness of the selective layer below 50–100 nm without introducing detrimental defects.Porous single-layer graphene,with its atomically thin pores,emerges as a promising two-dimensional(2D)material that minimizes diffusion resistance for molecular transport[4].Nevertheless,balancing high selectivity with high permeance has remained a formidable challenge. 展开更多
关键词 CO capture global warming combustion fossil fuelsthis climate changenecessitating pyridinic nitrogen greenhouse gas emissions membrane technology mitigate greenhouse gas emissions
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