含四烯基吡啶配体的Zn(Ⅱ)配位聚合物的合成、结构及其荧光性质  

Synthesis,structure,and fluorescence properties of Zncoordination polymers containing tetra‑alkenylpyridine ligands

作　　者：桑笑 刘琦 郎建平[1] SANG Xiao;LIU Qi;LANG Jianping(Suzhou Key Laboratory of Precision Transformation of Resource Molecules,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou,Jiangsu 215123,China)

机构地区：[1]苏州大学材料与化学化工学部,苏州市资源分子精准转化重点实验室,苏州215123

出　　处：《无机化学学报》2024年第11期2124-2132,共9页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.22301204,21773163);苏州市资源分子精准转化重点实验室(No.SZS_(2)01905)资助。

摘　　要：在3,5-二硝基苯甲酸(3,5-HDNBA)、4-吡唑羧酸(4-H_(2)PyC)或对乙基苯甲酸(4-HEBA)存在下,Zn(NO_(3))_(2)·6H_(2)O与1,2,4,5-四(4-乙烯基吡啶基)苯(tkpvb)发生溶剂热反应,制备了[Zn(tkpvb)(3,5-DNBA)_(2)]n(CP1)、{[Zn(tkpvb)(4-PyC)·2H_(2)O]}n(CP2)和{[Zn(tkpvb)0.5(4-EBA)_(2)]·H_(2)O}n(CP3)三种Zn(Ⅱ)基配位聚合物(CPs)。通过红外光谱、元素分析、粉末X射线衍射和单晶X射线衍射对它们进行了结构表征。CP1具有一维“之”字形链状结构,CP2和CP3则分别呈现六连接和四连接的三维拓扑结构。CP1~CP3均表现出光致发光现象,对无机金属离子有一定的响应性能。其中,Fe_(3)+离子对CP1的荧光强度影响最大,检测限达到0.020µmol·L^(-1)。这可能是Fe_(3)+与CP1中不配位的吡啶基之间的相互作用引起的。Solvothermal reactions of 3,5-dinitrobenzoic acid(3,5-HDNBA),4-pyrazolecarboxylic acid(4-H_(2)PyC)or 4-ethylbenzoic acid(4-HEBA)with Zn(NO_(3))2·6H_(2)O and 1,2,4,5-tetrakis(4-vinylpyridyl)benzene(tkpvb)gave rise to three kinds of coordination polymers(CPs),[Zn(tkpvb)(3,5-DNBA)2]n(CP1),{[Zn(tkpvb)(4-PyC)·2H_(2)O]}n(CP2),and{[Zn(tkpvb)0.5(4-EBA)2]·H_(2)O}n(CP3).CP1 has a 1D zigzag chain structure composed of Zn,tkpvb,and 4-EBA ligands.CP2 is a 3D topological structure that can be seen constructed from 2D[Zn(4-PyC)3]n layers connected by tkpvb ligands.CP3 holds a 4-connected 3D topological structure,where 1D channels are present.CP1-CP3 showed a fluorescence emission phenomenon,and they had certain responses to inorganic metal ions.Among them,Fe_(3)+ions had the greatest impact on the fluorescence intensity of CP1.In addition,after the addition of Fe_(3)+,the flu-orescence lifetime and fluorescence quantum yield of CP1 were significantly enhanced compared to CP2 and CP3,with a detection limit of 0.020µmol·L^(-1).This may be due to the interaction between Fe_(3)+and the uncoordinated pyr-idine groups in CP1.CCDC:2257638,CP1;2257639,CP2;2257640,CP3.

关 键 词：四烯基吡啶 配位聚合物 结构 荧光 金属离子检测 

分 类 号：O614.241[理学—无机化学]