石墨氮化碳/焦二酰亚胺作为水中银检测荧光探针的改性研究

IF 2.6 4区 材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY
ChemNanoMat Pub Date : 2025-05-08 DOI:10.1002/cnma.202400663
Soufian Chakir, Qiankun Xu, Yaru Li, Yu Ding, Ziteng Huang, Daosheng Sun, Yongfei Xu, Xianbiao Wang
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引用次数: 0

摘要

银离子(Ag+)虽然在工业和医学上有价值,但浓度高时就会产生危险,需要在环境介质中进行可靠的监测。本研究通过简单的开环反应,用二硫苏糖醇修饰石墨氮化碳/焦二酰亚胺(g-C3N4/PDI, CNP)复合物,制备了一种灵敏、选择性的荧光探针。引入了SH和OH基团,提高了探针的水分散性和对Ag+的亲和力,增强了探针的吸附能力和检测性能。这导致荧光强度增加两倍,选择性显著提高,斯特恩-沃尔默猝灭常数(Ksv)增加36%。此外,优化后的探针具有良好的稳定性(相对标准偏差<;1%),检测限从7.59 μM大幅降低到1.38 μM,证实了其高灵敏度。这种绿色,经济高效,易于制备的探针为环境和复杂矩阵中准确可靠的银离子监测提供了有前途的解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Modification of Graphitic Carbon Nitride/Pyromellitic Diimide as a Robust Fluorescent Probe for Silver Detection in Water

Silver ions (Ag+), though valuable in industry and medicine, become hazardous at high concentrations, requiring reliable monitoring in environmental media. In this study, a sensitive and selective fluorescent probe is developed by modifying a graphitic carbon nitride/pyromellitic diimide (g-C3N4/PDI, CNP) composite with dithiothreitol via a simple ring-opening reaction. The introduction of SH and OH groups improves the probe's water dispersibility and affinity for Ag+, enhancing its adsorption capacity and detection performance. This leads to a twofold increase in fluorescence intensity, significantly improved selectivity, and a 36% increase in the Stern–Volmer quenching constant (Ksv). Furthermore, the optimized probe exhibits excellent stability (relative standard deviation <1%) and a substantial decrease in the limit of detection from 7.59 to 1.38 μM, confirming its high sensitivity. This green, cost-effective, and easily prepared probe presents a promising solution for accurate and reliable Ag+ monitoring in environmental and complex matrices.

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来源期刊
ChemNanoMat
ChemNanoMat Energy-Energy Engineering and Power Technology
CiteScore
6.10
自引率
2.60%
发文量
236
期刊介绍: ChemNanoMat is a new journal published in close cooperation with the teams of Angewandte Chemie and Advanced Materials, and is the new sister journal to Chemistry—An Asian Journal.
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