3,5-二(2′,5′-苯二羧酸)苯甲酸构筑的金属有机配合物的荧光识别及磁性  

Luminescence Sensing and Magnetic Property of Three Metal-Organic Complexes Based on 3,5-Di(2′,5′-dicarboxylphenyl)benozoic Acid

作　　者：高玲玲 牛晓燕 杜意恩 胡拖平[2] GAO Ling-Ling;NIU Xiao-Yan;DU Yi-En;HU Tuo-Ping(College of Chemistry and Chemical Engineering,Jinzhong University,Jinzhong,Shanxi 030619,China;Department of Chemistry,College of Science,North University of China,Taiyuan 030051,China)

机构地区：[1]晋中学院化学化工学院,晋中030619 [2]中北大学理学院化学系,太原030051

出　　处：《无机化学学报》2020年第7期1383-1392,共10页Chinese Journal of Inorganic Chemistry

基　　金：山西省青年科技研究基金面上项目(No.201901D211443);晋中学院“1331工程”创新团队(No.jzxycxtd2019005);国家自然科学基金(No.21676258)资助。

摘　　要：设计合成了3种新颖的金属有机配合物(MOCs):{[Pb2(HL)(phen)]·2H2O)n(1),{[Ni(H3L)(4,4’-bipy)1.5(H2O)4]·(6H2O}n(2)和{[Ni2(HL)(1,4-bibb)(H2O)]·(CH3CN)·H2O)}n(3)(H5L=3,5-二(2’,5’-苯二羧酸)苯甲酸,phen=1,10-菲咯啉,4,4’-bipy=4,4’-联吡啶,1,4-bibb=1,4-二(苯并咪唑)苯),并通过单晶X射线衍射、红外光谱(IR)、热重分析(TG)和粉末衍射对它们进行结构表征。结构分析表明1是基于[Pb2(μ2-COO)2(μ1-COO)4] SBUs的一维链状结构;2是二维层状结构,其拓扑符号为{4.62)2{42.62.82};3是一个3D网络结构,其拓扑符号为{62.84}{64.82}2。进一步研究了配合物荧光和磁性能。荧光检测显示,配合物1在水溶液中可以高灵敏识别Fe3+和Cr2O72-离子。同时研究了配合物1对Fe3+和Cr2O72-猝灭机理。磁性分析表明配合物3中的Ni(Ⅱ)离子之间存在反铁磁相互作用。Three new metal-organic complexes(MOCs),namely {[Pb2(HL)(phen)]·2H2O}n(1),{[Ni(H3L)(4,4’-bipy)1.5(H2O)4]·6 H2O}n(2) and {[Ni2(HL)(1,4-bibb)(H2O)]·(CH3 CN)·H2O}n(3),have been synthesized by the V-pattern multicarboxylic acid ligand of H5L(H5L=3,5-di(2’,5’-dicarboxylpyl)benozoic acid,phen=1,10-phenanthroline,4,4’-bipy=4,4’-bipyridine,1,4-bibb=1,4-bis(benzimidazole)benzene) and Pb(Ⅱ)/Ni(Ⅱ) under solvothermal condition.1 is a 1D chains structure with the binuclear [Pb2(μ2-COO)2(μ-COO)4] SBUs.2 shows 2D lamellar networks with the point symbol of {4.62}2{42.62.82}.3 presents a 3D network structure with the point symbol of {62.84} {64.82}2.The fluorescence measurements show that 1 has highly sensitive detection for Fe3+ and Cr2O72- ions in aqueous solution by luminescence quenching effect.Meanwhile,the possible sensing mechanisms of 1 to Fe3+ and Cr2O72- were also investigated.Then,the variable-temperature magnetic susceptibility measurements reveal that 3 has antiferromagnetic interactions between the Ni(Ⅱ) ions.CCDC:1879614,1;1899101,2;1899100,3.

关 键 词：3 5-二(2' 5'-苯二羧酸)苯甲酸 金属有机配合物 荧光性能 磁性 

分 类 号：O614.433[理学—无机化学] O614.813[理学—化学]