Qi Shengsheng, Li Zhang, Jia Yuejiao, Li Dechao, Hu Ming
School of Chemistry and Chemical Engineering, Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials, Inner Mongolia University, Hohhot 010021, China.
Phys Chem Chem Phys. 2023 Apr 5;25(14):10090-10096. doi: 10.1039/d2cp05921e.
A transition metal coordination polymer, [Zn(tpba)(bqdbc)] (1), was successfully designed and synthesized based on 2,2'-biquinoline-4,4'-dicarboxylic acid (Hbqdc) and 4-(2,2';6',2'-terpyridin)-4'-yl)benzoic acid (Htpba). Compound 1 is initially constructed from the 1D chain of tpba and bqdc and further connected by π⋯π interactions, forming a 2D layered structure. Notably, compound 1 showed good fluorescence stability ranging from pH 1 to 13 in an aqueous solution. It was found that compound 1 could not only detect VO ions with high selectivity and recyclability but also serve as an excellent selective sensing material for Fe among some cations. More crucially, it is the first time that a luminescent coordination polymer has been used to detect VO ions in aqueous solution. The detection of nitrotoluene (-NT) demonstrated that compound 1 could also behave as a functional probe with high selectivity, sensitivity, and recyclability; and the detection limit of -NT was 50.9 nM. Meanwhile, the luminescence sensing mechanisms for different analytes were speculated in detail.
基于2,2'-联喹啉-4,4'-二甲酸（Hbqdc）和4-(2,2';6',2'-三联吡啶)-4'-基)苯甲酸（Htpba）成功设计并合成了一种过渡金属配位聚合物[Zn(tpba)(bqdbc)]（1）。化合物1最初由tpba和bqdc的一维链构成，并通过π⋯π相互作用进一步连接，形成二维层状结构。值得注意的是，化合物1在水溶液中pH值从1到13的范围内表现出良好的荧光稳定性。研究发现，化合物1不仅能够高选择性、可循环地检测VO离子，而且在一些阳离子中对Fe也是一种出色的选择性传感材料。更关键的是，这是首次将发光配位聚合物用于水溶液中VO离子的检测。对硝基甲苯（-NT）的检测表明，化合物1还可作为具有高选择性、灵敏度和可循环性的功能探针；-NT的检测限为50.9 nM。同时，详细推测了不同分析物的发光传感机制。
