基于噻唑的发光明镉配位聚合物作为水相中 4-硝基苯胺和 CrO 的双重响应化学传感器。

Luminescent Cd coordination polymer based on thiazole as a dual-responsive chemosensor for 4-nitroaniline and CrO in water.

机构信息

Research Laboratory of Inorganic Materials Synthesis, Department of Chemistry, Iran University of Science and Technology (IUST), Tehran, 16846-13114, Iran.

出版信息

Sci Rep. 2023 Jan 6;13(1):269. doi: 10.1038/s41598-023-27466-x.

A novel highly fluorescent cadmium metal-organic framework, [Cd (DPTTZ) (OBA)] (IUST-3), synthesized by using two linkers 2, 5-di (pyridine-4-yl) thiazolo [5, 4-d] thiazole (DPTTZ) and 4, 4'-oxybis (benzoic acid) (OBA) simultaneously, which exhibits a two-dimensional framework. The characteristics of this Cd-MOF were investigated by single-crystal X-ray diffraction, Fourier transform infrared spectroscopy, elemental analysis, powder X-ray diffraction, and thermogravimetry analysis. The IUST-3 exhibits excellent luminescence property and good stability in water. Luminescent experiments indicate that the IUST-3 has remarkable sensitivity and selectivity for the detection of 4-nitroaniline (4-NA), and CrO anion with K = 1.03 × 10 M (4-NA) and K = 2.93 × 10 M (CrO) and low limit of detection 0.52 µM (4-NA) and 1.37 µM (CrO). In addition, the possible fluorescence quenching mechanism was explored in this paper.

一种新型的高荧光镉金属有机骨架，[Cd(DPTTZ)(OBA)]（IUST-3），通过同时使用两个配体 2,5-二（吡啶-4-基）噻唑并[5,4-d]噻唑（DPTTZ）和 4,4'-氧双（苯甲酸）（OBA）合成，具有二维骨架。通过单晶 X 射线衍射、傅里叶变换红外光谱、元素分析、粉末 X 射线衍射和热重分析对该 Cd-MOF 的特性进行了研究。IUST-3 在水中表现出优异的发光性能和良好的稳定性。发光实验表明，IUST-3 对 4-硝基苯胺（4-NA）和 CrO 阴离子具有显著的灵敏度和选择性，K 值分别为 1.03×10 M（4-NA）和 2.93×10 M（CrO），检测限低至 0.52 µM（4-NA）和 1.37 µM（CrO）。此外，本文还探讨了可能的荧光猝灭机制。