基于水中Cr₂O₇^2-传感器的制备及性能研究

Preparation and Performance Study of Cr₂O₇^2- Sensor Based on Water

摘要: Cr₂O₇^2-作为一种常见的阴离子，在工业生产中常用作染料、颜料和防腐剂原料。然而，Cr₂O₇^2-具有较高的毒性和致癌性，长期暴露可能导致癌症，并对环境造成污染。因此，检测水环境中的额Cr₂O₇^2-是至关重要的。本文选择4-羟甲基-2, 6-吡啶二甲酸作为有机天线敏化稀土Tb³ 的发光，通过溶剂热的到了一种稀土配合物Tb(HL)。得到的Tb(HL)可以有效的检测水环境中Cr₂O₇^2-，并且具有较好的抗干扰性以及循环使用能力。通过实验和计算得到了传感机理及检测限，检测限为0.348 μM，Cr₂O₇^2-基于内波滤效应导致Tb³ 的发光猝灭。作为最有前途的化学传感器之一，Tb(HL)可以在水环境中有效地检测Cr₂O₇^2-。

Abstract: Cr₂O₇^2-, as a common anion, is commonly used as a raw material for dyes, pigments, and preservatives in industrial production. However, Cr₂O₇^2- has high toxicity and carcinogenicity, and long-term exposure may lead to cancer and cause environmental pollution. Therefore, detecting the amount of Cr₂O₇^2- in the water environment is crucial. In this article, 4-hydroxymethyl-2, 6-pyridinedicarboxylic acid was selected as an organic antenna to sensitize the luminescence of rare earth Tb³ , and a rare earth complex Tb(HL) was obtained through solvent heating. The obtained Tb(HL) can effectively detect Cr₂O₇^2- in water environment, and has good anti-interference and recycling ability. The sensing mechanism and detection limit were obtained through experiments and calculations, with a detection limit of 0.348 μM. Cr₂O₇^2- is quenching of Tb³ luminescence due to internal wave filtering effect. As one of the most promising chemical sensors, Tb(HL) can effectively detect Cr₂O₇^2- in water environments.