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U(VI) reduction by Shewanella oneidensis mediated by anthraquinone-2-sulfonate 认领 引用 被引量：7
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作者 刘金香 谢水波 +4 位作者 王永华 刘迎九 蔡萍莉 熊芬 王文涛 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第12期4144-4150,共7页
Anthraquinone-2-sulfonate（AQS） was employed in humus substitutes to evaluate the effects and influencing factors of U（VI） reduction by Shewanella oneidensis MR-1（S. oneidensis MR-1） under anaerobic condition. Th... Anthraquinone-2-sulfonate（AQS） was employed in humus substitutes to evaluate the effects and influencing factors of U（VI） reduction by Shewanella oneidensis MR-1（S. oneidensis MR-1） under anaerobic condition. The removal rate of U（VI） at 30 °C reaches 99.0% afterd 96 h with the p H value of 7.0 and AQS concentration of 1.0 mmol/L. The effective concentrations of AQS as the accelerator for U（VI） bioreduction are approximately 0.5-1.0 mmol/L. The bioreduction of U（VI） is inhibited when the concentration of AQS exceeds 2.0 mmol/L. The coexistence of ions, such as Cu2＋, Cr6＋, Mn2＋, shows a remarkable negative effect on the U（VI） reduction, and Zn2＋ shows less influence on the process compared with other tested ions. The U（VI） reduction is remarkably inhibited when the concentration of nitrate ion exceeds 1.0 mmol/L. Otherwise, no difference is found when the nitrate ion concentration is less than 0.5 mmol/L. Sulfate ion（5.0 mmol/L） slightly promotes the U（VI） reduction. Zero-valent iron（ZVI） promotes the U（VI） reduction by S. oneidensis, and the reduction rate improves with increasing the amount of ZVI in the range of 0-2.0 g/L. The XPS result indicates that uranium deposits on the cell surface are in U（VI） and U（IV） forms, and the majority of uranium in the solution is stable UO2. 展开更多
关键词 U（VI） anthraquinone-2-sulfonate（AQS） Shewanella oneidensis XPS
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Photoinduced Electron Transfer Reaction between Poly-guanylic Acid(5') with Anthraquinone-2-sulfonate 认领 引用
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作者 Jian Hua MA Hua SHAO +1 位作者 Si De YAO Nian Yun LIN(Laboratory of Radiation Chemistry Shanghai Institute of Nuclear Research, Chinese Academy of Science 《Chinese Chemical Letters》 SCIE CAS 2000年第6期527-530,共4页
The electron transfer reaction between triplet anthraquinone-2-sulfonate with poly-guanylic acid (5) (poly[G]) in acetonitrile-H2O has been investigated by 248 nm laser flash photolysis. The transient absorption spect... The electron transfer reaction between triplet anthraquinone-2-sulfonate with poly-guanylic acid (5) (poly[G]) in acetonitrile-H2O has been investigated by 248 nm laser flash photolysis. The transient absorption spectra of radical cation of poly[G] and radical anion of anthraqunione-2-sulfonate (AQS) arising from electron transfer reaction has been observed simultaneously for the first time. The formation processes of radical cation of poly[G] and radical anion of anthraquinone-2-sulfonate as well as the decay processes of triplet anthraquinone-2-sulfonate have also been observed, the apparent rate constants for the formation and decay of transient species have been determined. The free energy changes in the process of the electron transfer was also calculated. 展开更多
关键词 Electron transfer reaction poly[G] anthraquinone-2-sulfonate
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Argentum 5-Hydroxy-7-methoxy-2-phenyl-4H-chromen-4-one-6-sulfonate:Synthesis,Crystal Structure and Antitumor Activity 认领 引用
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作者 LI Wu-Wu ZHENG Min-Yan +1 位作者 GAO Yi-Hong ZHANG Zun-Ting 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2020年第10期1898-1905,1746,共8页
In order to improve the water solubility and bioavailability of 5-hydroxy-7-methoxyflavone,argentum 5-hydroxy-7-methoxy-2-phenyl-4H-chromen-4-one-6-sulfonate[Ag4(H2O)6](C(16)H(11)O4SO3)4·H2O(1,C(16)H(11)O4SO3=5-h... In order to improve the water solubility and bioavailability of 5-hydroxy-7-methoxyflavone,argentum 5-hydroxy-7-methoxy-2-phenyl-4H-chromen-4-one-6-sulfonate[Ag4(H2O)6](C(16)H(11)O4SO3)4·H2O(1,C(16)H(11)O4SO3=5-hydroxy-7-methoxy-2-phenyl-4H-chromen-4-one-6-sulfonate)was synthesized by sulfonation reaction.The structure of 1 was characterized by FT-IR,elemental analysis and X-ray single-crystal diffraction.Complex 1 belongs to the triclinic system,space group P1,a=8.077(4),b=12.365(4),c=17.735(7)A,V=1685.0(12)A3,Z=1,μ=1.372 mm^–1,Dc=1.936 g/cm^3,F(000)=984,the final R=0.0819 and wR=0.2332 with I>2σ(I).3D structure of 1 exhibits alternating organic and inorganic regions.O–H×××O hydrogen bonds and Ag–O coordination interactions exist among crystal water,coordinated water and sulfo group,which constructed an organic zone.Flavone skeletons form organic region of 1.Sulfo group is the bridge linking these two regions.The in vitro antitumor activity of 1 against human lymphoma cells U937 and human breast cancer cells MCF-7 were evaluated with CCK-8 assay.The result shows that 1 showed inhibitory activity against tumour cell U937 and MCF-7,and indicated that flavone sulfonate derivatives may be potential leads for further biological screenings and may generate drug-like molecules. 展开更多
关键词 argentum 5-hydroxy-7-methoxy-2-phenyl-4H-chromen-4-one-6-sulfonate sulfonation reaction crystal structure antitumor activity
Synthesis,Crystal Structure and Antitumor Activity of Tectochrysin-6-sulfonate 认领 引用
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作者 李午戊 张尊听 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第1期97-104,共8页
In order to enhance water-solubility and biological utilization rate of tectochrysin,sodium 5-hydroxyl-7-methoxyflavone-6-sulfonate（1） was synthesized and its structure was identified on the basis of ^1 H NMR,FT-IR ... In order to enhance water-solubility and biological utilization rate of tectochrysin,sodium 5-hydroxyl-7-methoxyflavone-6-sulfonate（1） was synthesized and its structure was identified on the basis of ^1 H NMR,FT-IR and elemental analysis.5-Hydroxyl-7-methoxyflavone-6-sulfonate was assembled with Ni（II） or Mn（II）,hexaquanickel（II） bis（5-hydroxyl-7-methoxyflavone-6-sulfonate） tetrahydrate（2） and hexaquamanganese（II） bis（5-hydroxyl-7-methoxyflavone-6-sulfonate） tetrahydrate（3） were obtained and characterized by IR spectroscopy.The crystal structures of 2 and 3 were determined by X-ray single-crystal diffraction analysis.The results showed that 2 and 3 are isomorphous crystals and crystallize in monoclinic crystal system,space group C2/c.In 2 and 3,the supramolecular structures are organized into hydrophilic and hydrophobic regions.Hydrophilic regions are generated by O–H？？？O hydrogen bonds among sulfonate groups,latticed water molecules and coordinated water molecules.The π-π stacking interactions assemble the flavone skeletons into columns and these columns form hydrophobic regions.The sulfonate groups play an important role as a bridge of the hydrophilic and hydrophobic regions as well as the inorganic and organic components.Three-dimensional networks of 2 and 3 are furnished by extensive array of hydrogen bonds,π-π stacking interactions and electrostatic interactions.The anti-proliferative activities of 1-3 in vitro against human leukemia cells K562 and human lung cancer cells A549 were evaluated by the standard MTT assay.The pharmacological activity results showed that the introduction of sulfonic acid groups enhanced the antitumor activity of tectochrysin. 展开更多
关键词 5-hydroxyl-7-methoxyflavone-6-sulfonate spectroscopic property crystal structure antitumor activity
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The flotation separation of fluorite and calcite particles facilitated by a novel fatty acid-based surfactant 认领 引用
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作者 LIU Peng TIAN Yu-hui +1 位作者 TIAN Meng-jie SUN Wei 《Journal of Central South University》 SCIE EI CAS CSCD 2026年第3期1188-1202,共15页
Oleic acid is a commonly used fatty acid collector in fluorite flotation,known for its effective collecting performance and cost-effectiveness,but with a limited selectivity.In this study,a novel collector,α-sulfonat... Oleic acid is a commonly used fatty acid collector in fluorite flotation,known for its effective collecting performance and cost-effectiveness,but with a limited selectivity.In this study,a novel collector,α-sulfonate group mixed acid(α-SMA),is introduced.The flotation test results demonstrate that the α-SMA collector provides significantly better selectivity in fluorite flotation.Specifically,the α-SMA collector exhibits a similar collecting ability to oleic acid for fluorite;however,its capacity to collect calcite is substantially lower.Zeta potential tests indicate that,under identical dosage conditions,α-SMA adsorbs in greater quantities on fluorite than on calcite.As a result,fluorite exhibits substantially higher flotation recoveries versus calcite with α-SMA collector.X-ray photoelectron spectroscopic analysis suggests that α-SMA facilitates a higher electron donation to Ca2+ions on fluorite compared to calcite surface,forming stronger chemical bonds with fluorite surface.This enhanced interaction leads to stronger adsorption of α-SMA on fluorite.Furthermore,when α-SMA adsorbs solely through its sulfonic group,its carbon chain is positioned almost parallel to calcite surface.This configuration significantly reduces the hydrophobicity of the calcite surface,leading to very low calcite recovery rates with α-SMA collector. 展开更多
关键词 fluorite flotation collector oleic acid fatty acid α-sulfonate group
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Highly reinforce the interface stability using 2-Phenyl-1H-imidazole-1-sulfonate electrolyte additive to enhance the high temperature performance of LiNi0.8Co0.1Mn0.1O2/graphite batteries 认领 引用 被引量：1
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作者 Xin He Yiting Li +8 位作者 Wenlian Wang Xueyi Zeng Huilin Hu Haijia Li Weizhen Fan Chaojun Fan Jian Cai Zhen Ma Junmin Nan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第5期10-22,I0001,共13页
This work develops 2-Phenyl-1H-imidazole-1-sulfonate(PHIS)as a multi-functional electrolyte additive for H2O/HF scavenging and film formation to improve the high temperature performance of LiNi0.8Co0.1Mn0.1O_... This work develops 2-Phenyl-1H-imidazole-1-sulfonate(PHIS)as a multi-functional electrolyte additive for H2O/HF scavenging and film formation to improve the high temperature performance of LiNi0.8Co0.1Mn0.1O2/graphite batteries.After 450 cycles at room temperature(25℃),the discharge capacity retentions of batteries with blank and PHIS-containing electrolyte are 56.03%and 94.92%respectively.After 230 cycles at high temperatures(45℃),their values are 75.30%and 88.38%respectively.The enhanced electrochemical performance of the batteries with PHIS-containing electrolyte is supported by the spectroscopic characterization and theoretical calculations.It is demonstrated that this PHIS electrolyte additive can facilitate the construction of the electrode interface films,remove the H2O/HF in the electrolyte,and improve the electrochemical performance of the batteries.This work not only develops a sulfonate-based electrolyte but also can stimulate new ideas of functional additives to improve the battery performance. 展开更多
关键词 LiNi0.8Co0.1Mn0.1O2/graphite battery High temperature performance H2O/HF scavenger 2-Phenyl-1H-imidazole-1-sulfonate Electrolyte additive
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Assembly of 3-sulfonated 2H-pyrrol-2-ones through the insertion of sulfur dioxide with allenoic amides 认领 引用
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作者 Kaida Zhou Jianqiang Chen Jie Wu 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第12期2996-2998,共3页
Generation of 3-sulfonated 2 H-pyrrol-2-ones through a three-component reaction of allenoic amides,sulfur dioxide,and aryldiazonium tetrafluoroborates under metal-free conditions is achieved.This transformation procee... Generation of 3-sulfonated 2 H-pyrrol-2-ones through a three-component reaction of allenoic amides,sulfur dioxide,and aryldiazonium tetrafluoroborates under metal-free conditions is achieved.This transformation proceeds under mild conditions without the addition of catalysts or additives,giving rise to 3-sulfonated 2 H-pyrrol-2-ones in moderate to good yields.Good functional group compatibility is observed.A plausible mechanism is proposed,which is initiated by aryl radicals formed in situ from aryldiazonium tetrafluoroborates and DABCO·(SO2)2.Additionally,excellent chemoselectivity and regioselectivity are presented in this transformation. 展开更多
关键词 Allenoic amide Aryldiazonium tetrafluoroborate 3-Sulfonated 2H-pyrrol-2-one Sulfur dioxide Metal-free
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SYNTHESIS OF MESO-TETRA (4-METHOXYPHENYL-3-SULFONATE) PORPHINE AND SPECTROPHOTOMETRIC STUDY OF COLOUR REACTION WITH COPPER 认领 引用
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作者 Yu Shou CHEN Hng Xing YU +2 位作者 Xiao Pin WANG Ze Xing HUANG Shu Qiong HE 《Chinese Chemical Letters》 SCIE CAS 1991年第11期855-858,共4页
In this paper meso-tetra (4-methoxyphenyl-3-sulpho) Porphine (TMPPS_4) was synthesized and its colour reaction with copper was studied. It was found to be a highly sensitive and highly selective reagent for the direct... In this paper meso-tetra (4-methoxyphenyl-3-sulpho) Porphine (TMPPS_4) was synthesized and its colour reaction with copper was studied. It was found to be a highly sensitive and highly selective reagent for the direct spectrophotometric determination of ultramicro amount of copper. The apparent molar absorptivity of the complex is 3.72×10~5L/mol·cm. Beer's law is obeyed for Cu(Ⅱ)of 0～1.4μg/10ml. The interference of 21 different ions and 6 kinds of salts were examined and found to be minimal. The complex formation of Cu(Ⅱ) with TMPPS_4 is generally slow at room temperature, but the reaction can be accelerated in the presence of NH_2OH·>HCl and completed within 5min. At PH 5.2 the Soret band of TMPPS_4 overlaps almost completetely with that of the complex. Therefore, the complex formation is taken to completion at this PH. Then the Soret band of TMPPS_4 shifted away from that of the complex by acidification. This simple and rapid method has been successfully applied to the direct determination of Cu in Al-alloys, industrial water, foods and human hair. 展开更多
关键词 METHOXYPHENYL-3-SULFONATE PORPHINE AND SPECTROPHOTOMETRIC STUDY OF COLOUR REACTION WITH COPPER SYNTHESIS OF MESO-TETRA
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MnO2-resistant ABTS spectrophotometry for trace permanganate 认领 引用
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作者 Chenyu Tang Jianying Wu +7 位作者 Yao Huang Jing Zou Xuewei Yu Bo Sun Zhongda Yan Haoqiang Tan Qingfeng Cheng Jun Ma 《ENGINEERING Environment》 SCIE EI CAS CSCD 2026年第4期187-199,共13页
Permanganate(Mn(VII))is a commonly used oxidant for water treatment.However,manganese dioxide(MnO2)produced in situ during permanganate oxidation reactions significantly interferes with the spectrophotometric measu... Permanganate(Mn(VII))is a commonly used oxidant for water treatment.However,manganese dioxide(MnO2)produced in situ during permanganate oxidation reactions significantly interferes with the spectrophotometric measurement of Mn(VII)when using the previously reported spectrophotometry.In this study,a convenient,low-cost,and reliable spectrophotometry method was firstly established for measuring trace Mn(VII)(μmol/L−level)during the permanganate oxidation reactions without the need to filter out MnO2.The method was based on the oxidation of 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonate)(ABTS)by Mn(VII)to produce a stable green radical(ABTS•+)under mildly alkaline conditions(pH≥8),with detection at long wavelengths(i.e.,732 nm and 820 nm).The strong resistance to interference from MnO2 of the modified ABTS method was attributed to the inertness of MnO2 toward ABTS under mildly alkaline conditions and the relatively low molar absorptivity of MnO2 at long wavelengths compared to ABTS•+.Using the characteristic peak at 732 nm as the detection wavelength,the sensitivity of the modified ABTS method for the Mn(VII)measurement was determined to be 4.84×104 L/(mol·cm).Additionally,the modified ABTS method exhibited high tolerance towards common environmental background matrices and was reliable in measuring the Mn(VII)concentration in natural water samples.The accuracy of the modified ABTS method for the measurement of Mn(VII)in the presence of MnO2 was also validated by comparing different detection methods.Furthermore,the modified ABTS method was successfully applied to detect the variation of Mn(VII)concentration during diclofenac removal with the humic acid-enhanced Mn(VII)process. 展开更多
关键词 Permanganate 2 2-Azino-bis(3-ethylbenzothiazoline-6-sulfonate) Manganese dioxide Spectrophotometry
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Removal of 5-Amino-2-chlorotoluene-4-sulfonic and Chlorhydric Acids from Wastewater by Weakly Basic Resin 认领 引用 被引量：4
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作者 李长海 许振良 李春平 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2006年第5期696-699,共4页
This research deals with an investigation of the adsorption of two acids, namely, 5-amino- 2-chlorotoluene-4-sulfonic and chlorhydric acids from their solution onto weakly basic resin. The screening of res-ins, kineti... This research deals with an investigation of the adsorption of two acids, namely, 5-amino- 2-chlorotoluene-4-sulfonic and chlorhydric acids from their solution onto weakly basic resin. The screening of res-ins, kinetics, and isotherm were studied. The results indicate that the D301R is more appropriate for the removal of acids from solution. The adsorption of acids obeys Langmuir isotherm and the first-order kinetics model. Sorptive affinity of the two acids on D301R was found to be in the order of 5-amino-2-chlorotoluene-4-sulfonic acid> chlorhydric acid. Thermodynamic parameters for the adsorption of acids were calculated and discussed. The maxi-mum removal of acids was observed around 97% and 76% at 25℃ for 5-amino-2-chlorotoluene-4-sulfonic acid and chlorhydric acid , respectively. 展开更多
关键词 5-amino-2-chlorotoluene-4-sulfonic acid chlorhydric acid adsorption weakly basic resin
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Enhanced bio-decolorization of1-amino-4-bromoanthraquinone-2-sulfonic acid by Sphingomonas xenophaga with nutrient amendment 认领 引用 被引量：2
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作者 Hong Lu Xiaofan Guan +2 位作者 Jing Wang Jiti Zhou Haikun Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2015年第1期124-130,共7页
Bacterial decolorization of anthraquinone dye intermediates is a slow process under aerobic conditions. To speed up the process, in the present study, effects of various nutrients on 1-amino-4-bromoanthraquinone-2-sul... Bacterial decolorization of anthraquinone dye intermediates is a slow process under aerobic conditions. To speed up the process, in the present study, effects of various nutrients on 1-amino-4-bromoanthraquinone-2-sulfonic acid（ABAS） decolorization by Sphingomonas xenophaga QYY were investigated. The results showed that peptone, yeast extract and casamino acid amendments promoted ABAS bio-decolorization. In particular,the addition of peptone and casamino acids could improve the decolorization activity of strain QYY. Further experiments showed that L-proline had a more significant accelerating effect on ABAS decolorization compared with other amino acids. L-Proline not only supported cell growth, but also significantly increased the decolorization activity of strain QYY. Membrane proteins of strain QYY exhibited ABAS decolorization activities in the presence of L-proline or reduced nicotinamide adenine dinucleotide, while this behavior was not observed in the presence of other amino acids. Moreover, the positive correlation between L-proline concentration and the decolorization activity of membrane proteins was observed, indicating that L-proline plays an important role in ABAS decolorization. The above findings provide us not only a novel insight into bacterial ABAS decolorization, but also an L-proline-supplemented bioaugmentation strategy for enhancing ABAS bio-decolorization. 展开更多
关键词 1-Amino-4-bromoanthraquinone- 2-sulfonic acid Sphingomonas xenophaga Enhancement Decolorization Nutrients
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Propane-2-sulfonic acid octadec-9-enyl-amide,a novel PPARα/γ dual agonist,protects against ischaemiainduced brain damage in mice by inhibiting inflammatory responses 认领 引用
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作者 HUANG Jun-xiong ZENG Kai-yue +2 位作者 XU Lan-xi JIN Xin YANG Li-chao 《中国药理学与毒理学杂志》 CAS CSCD 北大核心 2016年第10期1022-1022,共1页
OBJECTIVE Propane-2-sulfonic acid octadec-9-enyl-amide(N15),an analogue of oleoylethanolamide(OEA),is a novel PPARα/γdual agonist.Our previous studies verified the positive effects of OEA on the acute and delayed st... OBJECTIVE Propane-2-sulfonic acid octadec-9-enyl-amide(N15),an analogue of oleoylethanolamide(OEA),is a novel PPARα/γdual agonist.Our previous studies verified the positive effects of OEA on the acute and delayed stages of cerebral ischaemia.However,it is not clear whether N15 is effective against ischaemic cerebral injury.In the present study,male Kunming mice were subjected to middle cerebral artery occlusion(MCAO).METHODS To evaluate its preventive effects,N15(50,100 or 200 mg·kg-1,ip)was administered for3 d before ischaemia.To evaluate its therapeutic effects,N15(200 mg·kg-1,ip)was administered 1 h before reperfusion or 0,1,2 or 4 h after reperfusion.Neurological deficit scores,infarct volume and the degree of brain oedema were determined at 24 h after reperfusion.Blood brain barrier(BBB)disruption was evaluated by Evans blue(EB)leakage at 6 h after reperfusion.The activation/inflammatory responses of microglia were detected using immunohistochemistry and Western blotting.RESULTS N15 pretreatment improved neurological dysfunction,reduced infarct volume and alleviated brain oedema in a dose-dependent manner;the most effective dose was 200 mg·kg-1.The therapeutic time window was within 2 h after reperfusion.Moreover,N15was more potent in the treatment of cerebral ischaemia injury than OEA.N15 treatment preserved the BBB integrity and suppressed the activation of microglia.N15 inhibited inflammatory cytokine expression not only in MCAO mice but also in lipopolysaccharide(LPS)-stimulated BV-2microglial cells.Moreover,N15 decreased the phosphorylation levels of NF-κBp65,STAT3,and ERK1/2 both in vivo and in vitro.CONCLUSION Our findings demonstrated that N15 exerts neuroprotective effects and was more potent than OEA.Additionally,the neuroprotective effects of N15 on cerebral ischaemia may be attributed to its anti-inflammatory properties,at least in part,by enhancing PPARα/γdual signalling and inhibiting the activation of the NF-κB,STAT3,and ERK1/2 signalling pathways.These findings suggest that N15 may be a potential therapeutic choice for the prevention and treatment of ischaemic stroke. 展开更多
关键词 propane-2-sulfonic acid octadec-9-enyl-amide mice focal cerebral ischaemia activated microglia inflammation
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Removal of 5-Amino-2-chlorotoluene-4-sulfonic and Chlorhydric Acids From Wastewater by Weakly Basic Resin: Equilibrium and Kinetics 认领 引用
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作者 CHANG-HAI LI 《Biomedical and Environmental Sciences》 SCIE CAS 2007年第5期392-397,共6页
Objective To study the adsorption of 5-Amino-2-chlorotoluene-4-sulfonic (CLT) and chlorhydric (HCl) acids from wastewater by weakly basic resin. Methods The kinetics and isotherm were studied. Thermodynamic parameters... Objective To study the adsorption of 5-Amino-2-chlorotoluene-4-sulfonic (CLT) and chlorhydric (HCl) acids from wastewater by weakly basic resin. Methods The kinetics and isotherm were studied. Thermodynamic parameters for the adsorption of acids were calculated and discussed. Results The adsorption of CLT and HCl acids followed Langmuir isotherm and the first-order kinetics model. Conclusion The adsorptive affinity of the two acids on D301R is in the order of CLT acid 〉 HCl acid. CLT and HCl acids can be separated. 展开更多
关键词 5-Amino-2-chlorotoluene-4-sulfonic acid Chlorhydric acid Adsorption Weakly basic resin
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SYNTHESIS AND PROPERTIES OF 1-(2-IMIDAZOLYLAO)2-NAPHTHOL-4-SULFONIC ACID 认领 引用
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作者 Fu You PAN Sun Wei ZHANG 《Chinese Chemical Letters》 SCIE CAS 1991年第12期917-918,共2页
Synthesis of 1-(2-imidazolylazo)-2-naphthol-4-sulfonic acid is described including its physical and chemical properties and spectroscopic data. The reagent reacts with various transition metal ions to form water-solub... Synthesis of 1-(2-imidazolylazo)-2-naphthol-4-sulfonic acid is described including its physical and chemical properties and spectroscopic data. The reagent reacts with various transition metal ions to form water-soluble and colored chelates which can be decomposed by EDTA exoept cobalt chelate. Present method has good selectivity. 展开更多
关键词 SYNTHESIS AND PROPERTIES OF 1 IMIDAZOLYLAO)2-NAPHTHOL-4-SULFONIC ACID
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后发酵过程中乙醇对豆豉抗氧化能力的影响 认领 引用 被引量：13
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作者 邹磊 汪立君 +2 位作者 呼晴 李里特 八卷幸二 《食品与发酵工业》 CAS 北大核心 2006年第12期28-32,共5页
以黄豆为原材料,接种米曲霉制作豆豉,在豆豉后发酵过程中设定了不同乙醇添加量,测定了不同乙醇添加量的豆豉样品清除DPPH(2,2-diphenyl-1-picrylhydrazyl hydrate)及ABTS[2,2-’azinobis-(3-ethylbenzthia-zoline-6-sulfonic acid)]自... 以黄豆为原材料,接种米曲霉制作豆豉,在豆豉后发酵过程中设定了不同乙醇添加量,测定了不同乙醇添加量的豆豉样品清除DPPH(2,2-diphenyl-1-picrylhydrazyl hydrate)及ABTS[2,2-’azinobis-(3-ethylbenzthia-zoline-6-sulfonic acid)]自由基能力、Fe2+螯合能力、还原能力,评价了乙醇对豆豉抗氧化能力的影响。后发酵过程中,豆豉的抗氧化能力持续增大,醇对豆豉的抗氧化能力有影响,发酵相同时间的豆豉,抗氧化能力随乙醇含量的增大而下降。 展开更多
关键词 豆豉 抗氧化 乙醇 DPPH(2,2-diphenyl-1-picrylhydrazyl hydrate) ABTS[2,2'-azinobis-(3-ethylbenzthiazoline-6-sulfonic acid)] 多肽
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Syntheses and Crystal Structures of [Na(H_2O)1/2]X and NH_2(CH_2CH_3)_2X and Antioxidant Activity of the Former 认领 引用 被引量：1
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作者 刘彬 杨伯伦 《Chinese Journal of Structural Chemistry》 SCIE CAS 2009年第9期1112-1120,共9页
In order to enhance the water-solubility and biological utilization rate of chrysin, sodium 5,7-dihydroxylflavone-8-sulfonate （1, [Na（H2O）1/2]X, X = C15H9OSO3, 5,7-dihydroxylfla- vone-8-sulfonate） was synthesized ... In order to enhance the water-solubility and biological utilization rate of chrysin, sodium 5,7-dihydroxylflavone-8-sulfonate （1, [Na（H2O）1/2]X, X = C15H9OSO3, 5,7-dihydroxylfla- vone-8-sulfonate） was synthesized and its structure was identified on the basis of NMR, FT-IR and elemental analysis. The assembly of 5,7-dihydroxylflavone-8-sulfonate with diethylamide cation afforded diethylamide 5,7-dihydroxylflavone-8-sulfonate （2, NH2（CH2CH3）2X） which was characterized by FT-IR and elemental analysis. The crystal structures of 1 and 2 were determined by X-ray single-crystal diffraction analysis. The crystal of 1 is of triclinic system, space group P1, with a = 8.5628（13）, b = 12.8916（19）, c = 13.562（2） A, α = 82.494（1）, β = 78.601（2）, γ = 84.033（2）°, C30H20Na2O15S2, Z = 2, Mr = 730.59, V = 1450.3（4） A3, Dc = 1.673 g/cm3, F（000） = 748, p = 0.295 mm^-1, the final R = 0.0641 and wR = 0.1458. The crystal of 2 crystallizes in the triclinic system, space group Pi, with a = 7.689（2）, b = 11.184（3）, c = 11.734（3） A, α = 74.268（3）, βl = 81.751（4）, γ= 87.991（3）°, C19H21NO7S, Z = 2, Mr= 407.43, V= 961.2（4） A3, Dc = 1.408 g/cm3, F（000） = 428, p = 0.210 mm^-1, the final R = 0.0484 and wR = 0.1195. In 1, the three-dimensional structure is organized into organic and inorganic regions; the flavone skeletons are stacked into organic regions by π...π staeking interactions; inorganic regions are generated by Na-O coordination bonds among sulfonate groups, coordinated water molecules and NaI. The sulfonate groups play an important role as a bridge of inorganic and organic regions. One-dimensional chain structure of 2 is extended by N-H…O hydrogen bonds and π...π stacking interactions. Furthermore, the antioxidant activity of 1 was evaluated. The scavenging activity of 1 to DPPH free radical is better than that of the parent compound chrysin. 展开更多
关键词 5,7-dihydroxylflavone-8-sulfonate spectroscopic property crystal structure DPPH free radical scavenging activity
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Regulation of Superoxide Anion Radical During the Oxygen Delignification Process 认领 引用
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作者 曹石林 詹怀宇 +1 位作者 付时雨 陈礼辉 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2007年第1期132-137,共6页
In this study, the superoxide anion radicals were generated by the auto-oxidation of 1,2,3-trihydroxybenzene and determined by UV spectrophotometry, and the reaction was found to be facilitated by anthraquinone-2-sulf... In this study, the superoxide anion radicals were generated by the auto-oxidation of 1,2,3-trihydroxybenzene and determined by UV spectrophotometry, and the reaction was found to be facilitated by anthraquinone-2-sulfonic acid sodium salt. The bamboo kraft pulps were treated by the 1,2,3-trihydroxybenzene auto-oxidation method or the 1,2,3-trihydroxybenzene auto-oxidation combined with anthraquinone-2-sulfonic acid sodium salt to show the ef-fect of the superoxide anion radicals during the oxygen delignification of bamboo kraft pulp and the enhancing af-fect of anthraquinone compounds as an additive on delignification. The results indicated that the superoxide anion radicals could react with lignin and remove it from pulp with negligible damage on cellulose, and the an-thraquinone-2-sulfonic acid sodium salt could facilitate the generation of superoxide anion radical to enhance delig-nification of pulps. The oxygen delignification selectivity could be improved using the 1,2,3-trihydroxybenzene auto-oxidation system combined with anthraquinone-2-sulfonic acid sodium salt. 展开更多
关键词 superoxide anion radical anthraquinone-2-sulfonic acid sodium salt oxygen delignification selectivity
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Sulfonation of 1,4-diaminoanthraquinone leuco by chlorosulfonic acid:Kinetics and process intensification 认领 引用
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作者 Bing Liu Yingjiao Li +5 位作者 Moses Arowo Guangwen Chu Yong Luo Liangliang Zhang Haikui Zou Baochang Sun 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第6期163-169,共7页
The work herein employed a rotating packed bed(RPB)to intensify the sulfonation process of 1,4-diaminoanthraquinone leuco(DL)in an attempt to improve the yield of the product 1,4-diaminoanthra quinone-2-sulfonic acid(... The work herein employed a rotating packed bed(RPB)to intensify the sulfonation process of 1,4-diaminoanthraquinone leuco(DL)in an attempt to improve the yield of the product 1,4-diaminoanthra quinone-2-sulfonic acid(DSA).First,the effects of operating conditions in a stirred tank reactor(STR),including stirring speed,chlorosulfonic acid/DL molar ratio(η),solvent/DL mass ratio(ζ),reaction temperature and dropping speed of chlorosulfonic acid,on the yield of DSA were investigated.The yield of DSA can reach 87.34%under the optimal operating conditions:stirring speed of 500 r·min-1,ηof 4.5,ζof 7,reaction temperature of 150℃,dropping speed of 0.61 ml·min-1.In addition,the kinetics of the sulfonation process via the shrinking core model revealed that the reaction is controlled by diffusion via a product layer under the reaction temperature of 140℃.Furthermore,the RPB was employed to intensify the mass transfer between liquid and solid phases during the sulfonation reaction process.The results showed that the DSA yield of 92.69%obtained by RPB was 5.35%higher than that by STR,indicating that RPB can significantly intensify the mass transfer in the liquid-solid phase sulfonation reaction process. 展开更多
关键词 Sulfonation 1 4-Diaminoanthraquinone-2-sulfonic acid Kinetics Rotating packed bed(RPB) Chlorosulfonic acid
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Laser photolysis of interaction of poly-guanylic acid (5') with anthraquinone-2-sulfonate 认领 引用
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作者 马建华 韩镇辉 +3 位作者 林维真 姚思德 王文峰 林念芸 《Science China Chemistry》 CAS 2002年第4期384-388,共5页
The electron transfer reaction between triplet anthraquinone-2-sulfonate and poly-guanylic acid (5’) in CH3CN-H2O (97 : 3) has been investigated by 248 nm (KrF) laser flash photolysis. The transient absorption spectr... The electron transfer reaction between triplet anthraquinone-2-sulfonate and poly-guanylic acid (5’) in CH3CN-H2O (97 : 3) has been investigated by 248 nm (KrF) laser flash photolysis. The transient absorption spectra and kinetics obtained from the interaction of triplet anthraquinone-2-sulfonate and poly[G] demonstrate that the primary ionic radical pair, radical cation of poly[G] and radical anion of anthraquinone-2-sulfonate have been detected simultaneously. The free energy changes in the process of the electron transfer were also calculated. 展开更多
关键词 anthraquinone-2-sulfonate poly[G] laser photolysis.
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LCT和GCT联合鉴别未知水样中N,N-二烷基氨基乙基磺酸及其类似物 认领 引用
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作者 刘勤 陈佳 +1 位作者 林缨 谢剑炜 《分析测试学报》 CAS 北大核心 2007年第Z1期208-209,212,共2页
N,N-dialkylaminoethane-2-sulfonic acids are environmental marker compounds of V type nerve agents,hence analysis of them is very important for verification of the chemical weapons convention(CWC).In this article,liqui... N,N-dialkylaminoethane-2-sulfonic acids are environmental marker compounds of V type nerve agents,hence analysis of them is very important for verification of the chemical weapons convention(CWC).In this article,liquid chromatography-high resolution time of flight mass spectrometry coupled with accurate mass measurement were used to discriminate N,N-disopropyl aminoethane-2-sulfonic acid and a CWC non-related compound 3-(N-Morpholino)propanesulfonic acid in Water.The method was fast,simple and accurate,proving that high resolution mass spectrometry is a good technique for the analysis of unknown toxicant. 展开更多
关键词 High resolution time of flight mass spectrometry N,N-dialkylaminoethane-2-sulfonic acid Chemical weapon convention
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