Xue Yun-Shan, Tian Zheng-Chen, Zhang Xin-Yue, Wang Wen-Jing, Dai Jia-Hao, Chen Rui-Qi, Xu Xiao-Juan, Wang Jun
School of Chemistry & Environmental Engineering, Yancheng Teachers University, Yancheng 224007, PR China.
School of Chemistry & Environmental Engineering, Yancheng Teachers University, Yancheng 224007, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2024 Aug 5;316:124340. doi: 10.1016/j.saa.2024.124340. Epub 2024 Apr 23.
Three CPs [Zn(PDA)(BMIOPE)·3HO] (1), [Co(Br-BDC)(BMIOPE)] (2) and [Co(MIP)(BMIOPE)] (3) were synthesized by solvothermal method based on dual-ligand strategy (HPDA, Br-HBDC, BMIOPE and HMIP are 1,3-phenylenediacetic acid, 5-bromo-isophthalic acid, 4,4'-bis(2-methylimidazol-1-yl)diphenyl ether and 5-methylisophthalic acid, respectively). Complexes 1 and 3 exhibit twofold parallel interwoven sql nets. Complex 2 is 2D layer structure. The luminescence property investigations showed that complexes 1-3 could act as multi-responsive fluorescent sensors to detect UO, CrO and CrO and nitrofurantoin (NFT) through fluorescence turn-off process, presenting excellent sensitivity and selectivity. Finally, the possible fluorescent quenching mechanisms of complexes 1-3 toward the above pollutants are also further investigated by employing spectroscopic methods and quantum chemical calculations. The fluorescence lifetime measurements manifest the mechanism of fluorescence quenching is static quenching process.
通过基于双配体策略的溶剂热法合成了三种配合物[Zn(PDA)(BMIOPE)·3H₂O] (1)、[Co(Br-BDC)(BMIOPE)] (2) 和 [Co(MIP)(BMIOPE)] (3)（HPDA、Br-HBDC、BMIOPE 和 HMIP 分别为 1,3-苯二甲酸、5-溴间苯二甲酸、4,4'-双(2-甲基咪唑-1-基)二苯醚和 5-甲基间苯二甲酸）。配合物 1 和 3 呈现出二重平行交织的 sql 网络。配合物 2 为二维层状结构。发光性质研究表明，配合物 1 - 3 可作为多响应荧光传感器，通过荧光猝灭过程检测 UO₂²⁺、Cr₂O₇²⁻ 和 CrO₄²⁻ 以及硝基呋喃妥因 (NFT)，具有出色的灵敏度和选择性。最后，还通过光谱方法和量子化学计算进一步研究了配合物 1 - 3 对上述污染物可能的荧光猝灭机制。荧光寿命测量表明荧光猝灭机制为静态猝灭过程。
