Two lanthanide coordination polymers,{[Ln(Hbidc)(bidc)(H2O)3]-]·3 H2 O}n(H3 bidc=benzimidazole-5,6-dicarboxylic acid,Ln=Eu(1),Sm(2))have been hydrothennally synthesized.Both compounds are isostructure and crystal...Two lanthanide coordination polymers,{[Ln(Hbidc)(bidc)(H2O)3]-]·3 H2 O}n(H3 bidc=benzimidazole-5,6-dicarboxylic acid,Ln=Eu(1),Sm(2))have been hydrothennally synthesized.Both compounds are isostructure and crystallize in the P21c space group of monoclinic system.Complex1:a=11.087(6),b=8.972(5),c=23.064(13)A,β=95.027(5)°,V=2285.4(2)A3,Z=4,Mr=669.35,Dc=1.945 g/cm3,F(000)=1328,S=1.044,μ=2.827 mm-1,R=0.0393 and wR=0.0801 for 3458 observed reflections(I>2δ(I)).Complex 2:a=11.087(6),b=8.972(5),c=23.064(13)A,/3=95.027(5)°,V=2285.4(2)A3,Z=4,A/r=667.74,Dc=1.941 g/cm3,F(000)=1324,S=1.071,μ=2.652 mm-1,R=0.0329 and wR=0.0809 for 3744 observed reflections(I>2δ(I)).Complexes 1 and 2 have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses.IR spectroscopy,and thermogravimetric analyses(TGA).The single-crystal X-ray diffraction analysis reveals that complexes 1 and 2 are the isostructural 1D zigzag chain structures,which are further extended into a 3D supramolecular structure through hydrogen bonds and stacking interactions.Furthermore,the thermal stability,UV-vis absorption spectra and fluorescent properties of complexes 1 and 2 have been investigated and discussed in detail.展开更多
以3,4-二甲基苯胺为原料,经与水合氯醛、盐酸羟胺缩合,浓H2SO4作用下环合,碱性双氧水条件下进一步氧化开环合成2-氨基-4,5-二甲基苯甲酸,三步反应的总收率为34.3%.产物结构经傅里叶变换红外光谱(FT-IR)、核磁共振氢谱(1 H NMR)表征,证...以3,4-二甲基苯胺为原料,经与水合氯醛、盐酸羟胺缩合,浓H2SO4作用下环合,碱性双氧水条件下进一步氧化开环合成2-氨基-4,5-二甲基苯甲酸,三步反应的总收率为34.3%.产物结构经傅里叶变换红外光谱(FT-IR)、核磁共振氢谱(1 H NMR)表征,证明了结构的正确性.展开更多
基金supported by the Key Basic Research Project of Hebei Province(18961031D)the High-Level Talents Funding Project of Hebei Province(A201400233)+2 种基金the Science and Technology Research Project of Hebei’s Colleges and University(No.BJ 2017035)the Science and Technology Research and Development Program of Hebei Province,Zhangjiakou City(17120011D)the Doctoral Foundation of Hebei North University(12995557)
文摘Two lanthanide coordination polymers,{[Ln(Hbidc)(bidc)(H2O)3]-]·3 H2 O}n(H3 bidc=benzimidazole-5,6-dicarboxylic acid,Ln=Eu(1),Sm(2))have been hydrothennally synthesized.Both compounds are isostructure and crystallize in the P21c space group of monoclinic system.Complex1:a=11.087(6),b=8.972(5),c=23.064(13)A,β=95.027(5)°,V=2285.4(2)A3,Z=4,Mr=669.35,Dc=1.945 g/cm3,F(000)=1328,S=1.044,μ=2.827 mm-1,R=0.0393 and wR=0.0801 for 3458 observed reflections(I>2δ(I)).Complex 2:a=11.087(6),b=8.972(5),c=23.064(13)A,/3=95.027(5)°,V=2285.4(2)A3,Z=4,A/r=667.74,Dc=1.941 g/cm3,F(000)=1324,S=1.071,μ=2.652 mm-1,R=0.0329 and wR=0.0809 for 3744 observed reflections(I>2δ(I)).Complexes 1 and 2 have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses.IR spectroscopy,and thermogravimetric analyses(TGA).The single-crystal X-ray diffraction analysis reveals that complexes 1 and 2 are the isostructural 1D zigzag chain structures,which are further extended into a 3D supramolecular structure through hydrogen bonds and stacking interactions.Furthermore,the thermal stability,UV-vis absorption spectra and fluorescent properties of complexes 1 and 2 have been investigated and discussed in detail.
