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 |
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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。 |
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 |
基金项目: 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)和国家自然科学基金(No.21676258)资助。 |
Abstract: Three new metal-organic complexes(MOCs), namely {[Pb2(HL)(phen)]·2H2O}n (1), {[Ni(H3L)(4,4'-bipy)1.5 (H2O)4]·6H2O}n (2) and {[Ni2(HL)(1,4-bibb)(H2O)]·(CH3CN)·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(μ1-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. |
Keywords: 3,5-di(2',5'-dicarboxylphenyl)benozoic acid metal-organic framework luminescent properties magnetic property |
投稿时间:2019-12-04 修订日期:2020-02-01 |
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高玲玲,牛晓燕,杜意恩,胡拖平.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[J].无机化学学报,2020,36(7):1383-1392. |
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