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A Copper(Ⅱ)-cadmium(Ⅱ) Heterometallic Hexanuclear Complex:[Cd_4Cu_2(pdc)_4(H_2O)14](H_3pdc=3,5-Pyrazoledicarboxylic Acid) 认领 引用
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作者 周馨慧 银秀菊 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第2期180-185,共6页
The title complex 1,[Cd 4 Cu 2 （pdc） 4 （H 2 O） 14 ] （H 3 pdc=3,5-pyrazoledicarboxylic acid）,has been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction.Complex 1 crysta... The title complex 1,[Cd 4 Cu 2 （pdc） 4 （H 2 O） 14 ] （H 3 pdc=3,5-pyrazoledicarboxylic acid）,has been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction.Complex 1 crystallizes in triclinic,space group P1 with a=0.67235（10）,b=1.27935（18）,c=1.28569（17） nm,α=112.633（2）,β=102.971（3）,γ=97.089（2）o,V=0.9673（2） nm 3,C 20 H 32 Cd 4 Cu 2 N 8 O 30,M r=1441.22,D c=2.474 g/cm 3,μ（MoKα）=3.356 mm 1,F（000）=698,S=1.003,Z=1,the final R=0.0471 and wR=0.0748 for I 2σ（Ⅰ）.In 1,two deprotonated 3,5-pyrazoledicarboxylic acids （pdc 3）,one copper（Ⅱ） ion and one cadmium（Ⅱ） ion firstly form a pyrazole-bridged Cu II Cd II dinuclear unit,two of which related by an inversion center are connected by another two cadmium（Ⅱ） ions through chelating carboxylate groups to construct the copper（Ⅱ）-cadmium（Ⅱ） heterometallic hexanuclear complexes.Plenty of hydrogen bond interactions existing in the system further lead to a three-dimensional （3D） supramolecular framework. 展开更多
关键词 3 5-pyrazoledicarboxylic acid heterometallic complex hexanuclear copper（Ⅱ）-cadmium（Ⅱ）
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Hexanuclear ring cobalt complex for photochemical CO2 to CO conversion 认领 引用 被引量：2
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作者 Xiangyu Meng Rui Li +6 位作者 Junyi Yang Shiming Xu Chenchen Zhang Kejia You Baochun Ma Hongxia Guan Yong Ding 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第9期2414-2424,共11页
Photosynthesis in nature has been deemed as the most significant biochemical reaction,which maintains a relatively stable content of O2 and CO2 in the atmosphere.Herein,for a deeper comprehension of natural phot... Photosynthesis in nature has been deemed as the most significant biochemical reaction,which maintains a relatively stable content of O2 and CO2 in the atmosphere.Herein,for a deeper comprehension of natural photosynthesis,an artificial photosynthesis model reaction of photochemical CO2 to CO conversion(CO2+2 H++2e-→CO+H2O)catalyzed by a homogeneous hexanuclear ring cobalt complex{K2[CoO3PCH2N(CH2CO2)2]}6(Co6 complex)is developed.Using the[Ru(bpy)3]2+as a photosensitizer and TEOA as a sacrificial electron donor,an optimal turnover frequency of 503.3 h‒1 and an apparent quantum efficiency of 0.81%are obtained.The good photocatalytic CO2 reduction performance is attributed to the efficient electron transfer between Co6 complex and[Ru(bpy)3]2+,which boosts the photogenerated carriers separation of the photosensitizer.It is confirmed by the j‐V curves,light‐assisted UV‐vis curves,steady‐state photoluminescence spectra and real‐time laser flash photolysis experiments.In addition,the proposed catalytic mechanism for CO2 reduction reaction catalyzed by the Co6 complex is explored by the potassium thiocyanate poison experiment,Pourbaix diagram and density functional theory calculations. 展开更多
关键词 Photosynthesis Homogeneous catalysis CO2reduction reaction Density functional theory Hexanuclear ring cobalt complex
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Hydrothermal Synthesis and Crystal Structure of a Novel Hexanuclear Copper(Ⅱ) Complex:[Cu_6(DPPZ)_4(btc)_4(H_2O)_8]·5H_2O 认领 引用 被引量：3
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作者 刘春波 高林 +3 位作者 李秀颖 徐占林 王庆伟 车广波 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第2期262-266,共5页
A new hexanuclear copper（Ⅱ） complex,[Cu 6 （DPPZ） 4 （btc） 4 （H 2 O） 8 ]·5H 2 O （1,DPPZ=dipyrido[3,2-a：2,3-c]phenazine,H 3 btc=1,3,5-benzenetricarboxylic acid）,has been hydrothermally synthesized and st... A new hexanuclear copper（Ⅱ） complex,[Cu 6 （DPPZ） 4 （btc） 4 （H 2 O） 8 ]·5H 2 O （1,DPPZ=dipyrido[3,2-a：2,3-c]phenazine,H 3 btc=1,3,5-benzenetricarboxylic acid）,has been hydrothermally synthesized and structurally characterized by X-ray single-crystal diffraction,elemental analyses,IR,and thermogravimetric analysis.Its crystal structure is of triclinic system,space group P1 with a=12.489（4）,b=14.234（5）,c=14.484（5）,α=82.848（4）,β=79.399（4）,γ=73.646（4）°,V=2421.2（13） 3,Z=1,Cu 6 C 108 H 78 N 16 O 37,M r=2573.17,D c=1.752 g/cm 3,μ=1.398 mm-1,F（000）=1308,GOOF=1.011,the final R=0.0495 and wR=0.1030 for 5420 observed reflections with I 2σ（Ⅰ）.In 1,four btc 3ligands act as bridges between six neighboring Cu atoms to form an unusual hexanuclear copper cluster.The clusters are further connected by two types of O-H···O and O-H···N hydrogen bonds,generating a three-dimensional supramolecular structure.In addition,intermolecular and intramolecular π-π stacking interactions further consolidate the three-dimensional supramolecular framework of 1. 展开更多
关键词 copper（Ⅱ） complex dipyrido[3 2-a：2 3-c]phenazine 1 3 5-benzenetricarboxylic acid hexanuclear
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Synthcsis, Structure and Magnetochemistry of a New Hexanuclear Manganese Oxide Complex of the Formula [Mn_6O_2 (O_2CPh)10(CH_3CN)_4] 认领 引用
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作者 Jin AN Zhi Da CHEN +2 位作者 Jiang BIAN Shi Xi WANG Guang Xian XU (State Key Laboratory of Rare Earth Materials Chemistry and Applications, Rare Earth Materials and Bio-inorganic Chemistry Laboratory o 《Chinese Chemical Letters》 SCIE CAS 1999年第8期697-700,共4页
The reported X-ray structure and magnetochemical properties of [Mn6O2 (OCPh)10, (CH3CN)4], effectively derived from [NBu4][Mn4O2(O2CPh)9 (H2O)] with equivalent of tren in CH3CN is shown.
关键词 Manganese complex: hexanuclear magnetochemistry. oxide complex crystal structure
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Synthesis and Structure of the Hexanuclear Diazenido-oxomolybdate[(n-C_4H_9)_4N]_3[Mo_6O18(N_2C_6H_4-p-NO_2)] 认领 引用
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作者 李海莲 黄锦顺 《Chinese Journal of Structural Chemistry》 SCIE CAS 1994年第2期109-112,共4页
Compound[(n-C4H9)4N]3 [Mo6O18(N2C6H4-pNO2)] crystallizes in the orthorhombic space grou Pnma with a= 23. 964(9).b=16.948(4),c=17.968(7) A,V=7298(7) A3,Z=4,and Dc=1.58 g/cm-3. Structure solution and refinement based on... Compound[(n-C4H9)4N]3 [Mo6O18(N2C6H4-pNO2)] crystallizes in the orthorhombic space grou Pnma with a= 23. 964(9).b=16.948(4),c=17.968(7) A,V=7298(7) A3,Z=4,and Dc=1.58 g/cm-3. Structure solution and refinement based on 3113 reflections with I>3.0σ(I) gave final residuals of R= 0.072 and Rω=0.099.The anion is a substitution isopolymolybdate. 展开更多
关键词 synthesis crystal structure hexanuclear Mo complex
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Systematic studies of hexanuclear {M4Ⅲ Ln2Ⅲ} complexes (M=Fe,Ga;Ln=Er,Ho):structures,magnetic properties and SMM behavior 认领 引用 被引量：1
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作者 Sihuai Chen Valeriu Mereacre +2 位作者 George E.Kostakis Christopher E.Anson Annie K.Powell 《Inorganic Chemistry Frontiers》 SCIE EI 2017年第6期927-934,共8页
Four isostructural MⅢ4 LnⅢ2 coordination clusters,[M4Ln2(μ3-OH)2(nbdea)4(C6H5COO)8]·MeCN (M=Fe,Ln=Er (1);M=Ga,Ln=Er (2);M=Fe,Ln=Ho (3);M=Ga,Ln=Ho (4)) have been synthesized ... Four isostructural MⅢ4 LnⅢ2 coordination clusters,[M4Ln2(μ3-OH)2(nbdea)4(C6H5COO)8]·MeCN (M=Fe,Ln=Er (1);M=Ga,Ln=Er (2);M=Fe,Ln=Ho (3);M=Ga,Ln=Ho (4)) have been synthesized and characterized. Single-crystal X-ray diffraction and X-ray powder diffraction studies revealed that all four compounds crystallize isomorphously to each other,and to the previously reported M4Ⅲ Dy2Ⅲ (M=Fe or Ga) and Fe4Ⅲ Y2Ⅲ analogues. DC magnetic susceptibility measurements for compounds 1–4,taken in combination with those for the FeⅢ4 YⅢ2 analogue,indicated that the interactions between ErⅢ ions are weakly ferromagnetic and the FeⅢ–ErⅢ interactions are very weakly antiferromagnetic,while the HoⅢ–HoⅢ and FeⅢ–HoⅢ interactions are both negligible. By comparison,for the FeⅢ4 DyⅢ2 analogue,the DyⅢ–DyⅢ interactions are antiferromagnetic while the FeⅢ–DyⅢ are ferromagnetic. Both Er analogues 1 and 2 display single-molecule magnet (SMM) behavior with the effective energy barrier Ueff increasing from 12.8 K (for Fe4Er2 1) to 53.5 K (for Ga4Er2 2),indicating that the very weak 3d–4f interaction enhances the QTM effect. 展开更多
关键词 hexanuclear complexes magnetic properties dc magnetic susceptibility measurements ferromagnetic interactions dc magnetic susceptibility X ray diffraction isostructural clusters single molecule magnet
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