基于4-(2,4-二羧基苯氧基)邻苯二甲酸配体的锌配位聚合物的合成、结构及其荧光传感性能  

Synthesis,structure,and fluorescence sensing properties of zinc coordination polymer based on 4‑(2,4‑dicarboxylic phenoxyl)phthalic acid ligand

作　　者：蔡苗 王竹云[2] 陈小莉[1] 刘露 闫睿魁 崔华莉[1] 杨华[1] 王记江[1] CAI Miao;WANG Zhu-Yun;CHEN Xiao-Li;LIU Lu;YAN Rui-Kui;CUI Hua-Li;YANG Hua;WANG Ji-Jiang(School of Chemistry and Chemical Engineering,Shaanxi Key Laboratory of Chemical Reaction Engineering,Laboratory of New Energy&New Function Materials,Yan′an University,Yan′an,Shaanxi 716000,China;Hybrid Rapeseed Research Center of Shaanxi Province,Yangling,Shaanxi 712100,China)

机构地区：[1]延安大学化学与化工学院,陕西省反应工程重点实验室,新能源新功能材料实验室,延安716000 [2]陕西省杂交油菜研究中心,杨凌712100

出　　处：《无机化学学报》2023年第7期1379-1388,共10页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21763028);陕西省科技厅重点研发计划一般项目(No.2022NY-071)资助。

摘　　要：基于H_(4)dpa和bpy(H_(4)dpa=4-(2,4-二羧基苯氧基)邻苯二甲酸,bpy=4,4’-联吡啶)为配体,在水热条件下设计、合成了金属锌配位聚合物(Zn-CP)[Zn(H_(2)dpa)(bpy)_(1.5)]_(n)(1),并用元素分析、红外光谱、X射线单晶衍射等对其进行了结构表征。在1中相邻Zn^(2+)与H_(2)dpa^(2-)离子和bpy配位形成一维双链结构,相邻的一维双链通过氢键作用扩展形成三维超分子网结构。荧光研究表明:1是一种灵敏度高、选择性好、多响应的荧光传感器,可用于农药和硝基爆炸物的检测。有趣的是,2,4,6-三硝基苯(TNP)和嘧霉胺(Pth)对1的荧光发射显示出明显的猝灭效果,而抑霉唑(Ima)对1有荧光增强效果。此外,通过紫外可见吸收光谱、荧光寿命以及X射线光电子能谱探究了1的荧光传感机理。A zinc coordination polymer(Zn-CP)based on H_(4)dpa and bpy ligands(H_(4)dpa=4-(2,4-dicarboxylic phenoxyl)phthalic acid,bpy=4,4′-dipyridine),namely[Zn(H_(2)dpa)(bpy)_(1.5)]_(n)(1),has beenhydrothermal synthesized and structurally characterized by elemental analyses,IR spectroscopy and single-crystal X-ray diffraction analysis.1 shows 1D double chain based on Zn^(2+)ion,H_(2)dpa^(2-)and bpy ligand.The adjacent 1D double chains further expand into a 3D supramolecular network through hydrogen bonding.Fluorescence studies show that 1 is a fluorescence sensor with high sensitivity,good selectivity,and multiple responses,which can be used for the detection of pesticides and nitro explosives.Interestingly,2,4,6-trinitrobenzene(TNP),and pyrimethanil(Pth)had an obvious quenching effect on the fluorescence emission of 1,while imazalil(Ima)had an enhancement effect on the fluorescence of 1.In addition,the fluorescence mechanism was investigated by means of UV-Vis absorption spectrum,fluorescence lifetime,and X-ray photoelectron spectroscopy.

关 键 词：4-(2 4-二羧基苯氧基)邻苯二甲酸 晶体结构 荧光传感 

分 类 号：O614.241[理学—无机化学]