A new hexanuclear silver （I） compound 2 containing thiosemicarbazone with the group of benzene was synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analysis and fluorescence ...A new hexanuclear silver （I） compound 2 containing thiosemicarbazone with the group of benzene was synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analysis and fluorescence spectrum. The title compound crystallizes in triclinic, space group P with a = 11.611（3）, b = 15.610（5）, c = 15.624（7） , α = 113.942（6）, β = 104.520（6）, γ = 104.230（4）°, V = 2304.1（14） 3, C60H77Ag6N22O4.5S6, Mr = 2018.02, Dc = 1.454 g/cm3, μ（MoKα） = 1.435 mm-1, F（000） = 1005, Z = 1, the final R = 0.0468 and wR = 0.1474 for 6608 observed reflections （I 2σ（I））. In the structure, the S atom of the ligand L2 （L2 = benzaldehyde thiosemicarbazone） served as a triply bridged chelator to connect the six silver atoms into a Ag6L26 cluster. The luminescence property of compound 2 was investigated at room temperature.展开更多
The title complex,[Ag 2 （L1） 2 （Pyr）·2.5H 2 O] 1 （L1=6-amino-1-naphthalenesulfonate anion,Pyr=pyrazine）,has been synthesized and characterized by single-crystal X-ray diffraction analysis.It crystallizes in...The title complex,[Ag 2 （L1） 2 （Pyr）·2.5H 2 O] 1 （L1=6-amino-1-naphthalenesulfonate anion,Pyr=pyrazine）,has been synthesized and characterized by single-crystal X-ray diffraction analysis.It crystallizes in triclinic,space group P1,with a=7.339（5）,b=13.105（5）,c=14.097（5）,α=84.377（5）,β=76.921（5）,γ=79.628（5）°,V=1296.7（11） 3,C 48 H 50 Ag 4 N 8 O 17 S 4,M r=1570.68,Z=1,D c=2.011 g/cm 3,μ=1.732 mm-1,F（000）=782,S=1.148,the final R=0.0436 and wR=0.1181 for 4130 observer reflections （I 2σ（Ⅰ））.Compound 1 shows a rare one-dimensional （1D） double chain,and the chains are further connected through secondary bonding,hydrogen bonds,and π-π interactions to generate a three-dimensional （3D） supramolecular structure.The luminescent property of 1 was also studied in the solid state at room temperture.展开更多
Two new tetrazole 1-acetato complexes, [Ag（1-tza）（phen）]∞ （1） and [Cd（1- tza）2（2,2＇-bipy）]∞ （2） （1-Htza = tetrazole 1-acetato, phen = 1,10-phenanthroline, 2,2＇-bipy = 2,2＇-bipyridine）, have been syn...Two new tetrazole 1-acetato complexes, [Ag（1-tza）（phen）]∞ （1） and [Cd（1- tza）2（2,2＇-bipy）]∞ （2） （1-Htza = tetrazole 1-acetato, phen = 1,10-phenanthroline, 2,2＇-bipy = 2,2＇-bipyridine）, have been synthesized by solvothermal synthesis and structurally characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. Complex 1 shows a 1-D chained structure, while the structure of 2 contains two 1-D chains, which is the first 1-tza-based complex containing three different coordination modes of the 1-tza ligand. The aromatic stacking effects play an important role in the formation of supramolecular frameworks of these two complexes. Photoluminescent studies show that the two complexes exhibit efficient luminescence. In addition, optical diffuse reflectance spectra and thermogravimetric analyses of 1 and 2 have also been investigated.展开更多
Reaction of the oligo（phenylenevinylene） 4,4＇-bis（2,5-dimethylstyryl）biphenyl （bdb） with CF3CO2Ag in benzene gave a novel octanuclear sandwich cluster [Ags（bdb）2（C6H6）2（CF3CO2）8]·2C6H6 （1）. The clu...Reaction of the oligo（phenylenevinylene） 4,4＇-bis（2,5-dimethylstyryl）biphenyl （bdb） with CF3CO2Ag in benzene gave a novel octanuclear sandwich cluster [Ags（bdb）2（C6H6）2（CF3CO2）8]·2C6H6 （1）. The clusters are packed on each other through strong n-n interactions to form ^1D ＇brick＇ chains, between which the solvated benzene molecules are located. TG analysis showed that cluster 1 could completely liberate the guest benzene molecules at 105℃ and the coordinated benzene molecules at 180 ℃. In solid state, cluster 1 exhibits fluorescence, and the emission band is red-shifted compared with that of free ligand bdb.展开更多
A series of acyls （Ac, Bz and Ts） were introduced regioselectively to the 2-hydroxyl in methyl and ally 3-O-benzyl-α-L-rhamnopyranosides mediated by silver（I） oxide in the presence of a catalytic amount of potass...A series of acyls （Ac, Bz and Ts） were introduced regioselectively to the 2-hydroxyl in methyl and ally 3-O-benzyl-α-L-rhamnopyranosides mediated by silver（I） oxide in the presence of a catalytic amount of potassium iodide in 56-78% yields.展开更多
In this study,a novel class of histidine Schiff base silver（Ⅰ） complexes derived from salicylaldehyde,1a-9a,was found to be an effective inhibitor of α-glucosidase.The results of this study showed that the newly s...In this study,a novel class of histidine Schiff base silver（Ⅰ） complexes derived from salicylaldehyde,1a-9a,was found to be an effective inhibitor of α-glucosidase.The results of this study showed that the newly synthesized complexes inhibited α-glucosidase through noncompetitive mechanisms;the IC50values were ranging from 0.00431 μmol L ~1 to 0.492 μmol L ~1.The structure-activity relationship was established as well.These results demonstrated that compound 7a,5-nitro salicylaldehyde Schiff base silver complex,is the most promising α-glucosidase inhibitor with the lowest IC50 value,which could be exploited as a drug candidate to alleviate postprandial hyperglycemia in the treatment of type II diabetes mellitus.This research provided a catalyst-free,simple,and environmentally benign reaction to synthesize compounds using mechanochemistry.展开更多
A novel Ag（1） complex AgH（Nifa）2 1 （C26H17AgF6N4O4, Mr = 671.31） was synthesized through hydrothermal reaction of Ag2SO4 and Niflumic acid （HNifa）, and characterized by single-crystal X-ray determination, IR a...A novel Ag（1） complex AgH（Nifa）2 1 （C26H17AgF6N4O4, Mr = 671.31） was synthesized through hydrothermal reaction of Ag2SO4 and Niflumic acid （HNifa）, and characterized by single-crystal X-ray determination, IR and fluorescent spectra. Crystal data for 1： monoclinic, space group C2/c, with a = 9.5446（16）, b = 12.3203（16）, c = 21.056 （3） A, β = 98.075（2）°, V= 2451.5（6） A^3, T = 293（2） K, Z = 4, D,. = 1.819 g/cm^3, F（000） = 1336,μ = 0.912 mm^-1, S = 1.001, （△ρ）min = 0.849, the final R = 0.0391 and wR = 0.1286. The local geometry around the central metal AgO） ion is linear. Two carboxylic acids of neighboring ligands sharing one hydrogen atom by two hydrogen bonds result in the formation of an infinite hydrogen-bonded chain. Solid-state fluorescence of I at room temperature shows that the maximal emission peak occurs in 439 nm.展开更多
基金supported by the Postdoctoral Science Foundation of Central South University
文摘A new hexanuclear silver （I） compound 2 containing thiosemicarbazone with the group of benzene was synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analysis and fluorescence spectrum. The title compound crystallizes in triclinic, space group P with a = 11.611（3）, b = 15.610（5）, c = 15.624（7） , α = 113.942（6）, β = 104.520（6）, γ = 104.230（4）°, V = 2304.1（14） 3, C60H77Ag6N22O4.5S6, Mr = 2018.02, Dc = 1.454 g/cm3, μ（MoKα） = 1.435 mm-1, F（000） = 1005, Z = 1, the final R = 0.0468 and wR = 0.1474 for 6608 observed reflections （I 2σ（I））. In the structure, the S atom of the ligand L2 （L2 = benzaldehyde thiosemicarbazone） served as a triply bridged chelator to connect the six silver atoms into a Ag6L26 cluster. The luminescence property of compound 2 was investigated at room temperature.
基金supported by the Science Foundation of Suihua University (K1001005)
文摘The title complex,[Ag 2 （L1） 2 （Pyr）·2.5H 2 O] 1 （L1=6-amino-1-naphthalenesulfonate anion,Pyr=pyrazine）,has been synthesized and characterized by single-crystal X-ray diffraction analysis.It crystallizes in triclinic,space group P1,with a=7.339（5）,b=13.105（5）,c=14.097（5）,α=84.377（5）,β=76.921（5）,γ=79.628（5）°,V=1296.7（11） 3,C 48 H 50 Ag 4 N 8 O 17 S 4,M r=1570.68,Z=1,D c=2.011 g/cm 3,μ=1.732 mm-1,F（000）=782,S=1.148,the final R=0.0436 and wR=0.1181 for 4130 observer reflections （I 2σ（Ⅰ））.Compound 1 shows a rare one-dimensional （1D） double chain,and the chains are further connected through secondary bonding,hydrogen bonds,and π-π interactions to generate a three-dimensional （3D） supramolecular structure.The luminescent property of 1 was also studied in the solid state at room temperture.
基金supported by the NSF of Jiangxi Province(51302041)the Fujian Institute of Research on the Structure of Matter(20140014)the Key Laboratory of University for Materials Chemistry
文摘Two new tetrazole 1-acetato complexes, [Ag（1-tza）（phen）]∞ （1） and [Cd（1- tza）2（2,2＇-bipy）]∞ （2） （1-Htza = tetrazole 1-acetato, phen = 1,10-phenanthroline, 2,2＇-bipy = 2,2＇-bipyridine）, have been synthesized by solvothermal synthesis and structurally characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. Complex 1 shows a 1-D chained structure, while the structure of 2 contains two 1-D chains, which is the first 1-tza-based complex containing three different coordination modes of the 1-tza ligand. The aromatic stacking effects play an important role in the formation of supramolecular frameworks of these two complexes. Photoluminescent studies show that the two complexes exhibit efficient luminescence. In addition, optical diffuse reflectance spectra and thermogravimetric analyses of 1 and 2 have also been investigated.
文摘Reaction of the oligo（phenylenevinylene） 4,4＇-bis（2,5-dimethylstyryl）biphenyl （bdb） with CF3CO2Ag in benzene gave a novel octanuclear sandwich cluster [Ags（bdb）2（C6H6）2（CF3CO2）8]·2C6H6 （1）. The clusters are packed on each other through strong n-n interactions to form ^1D ＇brick＇ chains, between which the solvated benzene molecules are located. TG analysis showed that cluster 1 could completely liberate the guest benzene molecules at 105℃ and the coordinated benzene molecules at 180 ℃. In solid state, cluster 1 exhibits fluorescence, and the emission band is red-shifted compared with that of free ligand bdb.
基金financially supported by the National Natural Science Foundation of China(No.30300434)the 0utstanding Youth Foundation of Sichuan Province(No.04ZQ026-039).
文摘A series of acyls （Ac, Bz and Ts） were introduced regioselectively to the 2-hydroxyl in methyl and ally 3-O-benzyl-α-L-rhamnopyranosides mediated by silver（I） oxide in the presence of a catalytic amount of potassium iodide in 56-78% yields.
文摘In this study,a novel class of histidine Schiff base silver（Ⅰ） complexes derived from salicylaldehyde,1a-9a,was found to be an effective inhibitor of α-glucosidase.The results of this study showed that the newly synthesized complexes inhibited α-glucosidase through noncompetitive mechanisms;the IC50values were ranging from 0.00431 μmol L ~1 to 0.492 μmol L ~1.The structure-activity relationship was established as well.These results demonstrated that compound 7a,5-nitro salicylaldehyde Schiff base silver complex,is the most promising α-glucosidase inhibitor with the lowest IC50 value,which could be exploited as a drug candidate to alleviate postprandial hyperglycemia in the treatment of type II diabetes mellitus.This research provided a catalyst-free,simple,and environmentally benign reaction to synthesize compounds using mechanochemistry.
文摘A novel Ag（1） complex AgH（Nifa）2 1 （C26H17AgF6N4O4, Mr = 671.31） was synthesized through hydrothermal reaction of Ag2SO4 and Niflumic acid （HNifa）, and characterized by single-crystal X-ray determination, IR and fluorescent spectra. Crystal data for 1： monoclinic, space group C2/c, with a = 9.5446（16）, b = 12.3203（16）, c = 21.056 （3） A, β = 98.075（2）°, V= 2451.5（6） A^3, T = 293（2） K, Z = 4, D,. = 1.819 g/cm^3, F（000） = 1336,μ = 0.912 mm^-1, S = 1.001, （△ρ）min = 0.849, the final R = 0.0391 and wR = 0.1286. The local geometry around the central metal AgO） ion is linear. Two carboxylic acids of neighboring ligands sharing one hydrogen atom by two hydrogen bonds result in the formation of an infinite hydrogen-bonded chain. Solid-state fluorescence of I at room temperature shows that the maximal emission peak occurs in 439 nm.
