基于水中Cr₂O₇2-</sup>传感器的制备及性能研究

Preparation and Performance Study of Cr₂O₇2-</sup> Sensor Based on Water

Cr2O72-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,Cr2O72-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Cr2O72-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Cr2O72-,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,Cr2O72-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Cr2O72-。

Cr2O72-, as a common anion, is commonly used as a raw material for dyes, pigments, and preservatives in industrial production. However, Cr2O72- has high toxicity and carcinogenicity, and long-term exposure may lead to cancer and cause environmental pollution. Therefore, detecting the amount of Cr2O72- 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 Cr2O72- 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. Cr2O72- is quenching of Tb3 luminescence due to internal wave filtering effect. As one of the most promising chemical sensors, Tb(HL) can effectively detect Cr2O72- in water environments.