A Multifunctional Fluorescent Probe Based on 1,8-Naphthalimide for the Detection of Co2+, F−, and CN−

Ping Li, Xian-Xian Ji, Ming-Yao Xu, Yu-Long Liu, Liu Yang
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Abstract

Cations and anions are indispensable resources for the development of nature and modern industry and agriculture, and exploring more efficient technology to monitor them is urgently needed. A multifunctional fluorescent probe based on 1,8-naphthalimide, N-(2-thiophenhydrazide)acetyl-4-morpholine-1,8-naphthalimide (TMN), was successfully designed and synthesized for the detection of Co2+, F−, and CN−, with N-carboxymethyl-4-morpholine-1,8-naphthalimide and thiophene-2-carbohydrazide as starting materials. TMN displayed superior stability in MeCN with an “on–off” mode towards Co2+, F−, and CN− by the naked eye. The linear response ranges of TMN were 0–3 and 4–19 μM with a detection limit of 0.21 μM for detecting Co2+, 0–5 and 5–22 μM with a detection limit of 0.36 μM for F−, and 0–10 and 10–25 μM with a detection limit of 0.49 μM for CN−. TMN could also recognize Co2+, F−, and CN− in real samples. Finally, the possible sensing mechanisms of TMN for detecting Co2+, F−, and CN− were deeply investigated. These results implied that TMN could be a potential chemosensor for monitoring metal cations and anions sensitively and selectively and could be used in real sample detection.
基于1,8-萘酰亚胺的多功能荧光探针用于检测Co2+, F−和CN−
阳离子和阴离子是自然界和现代工农业发展不可缺少的资源,迫切需要探索更有效的监测技术。以N-羧甲基-4-morpholine-1,8-萘酰亚胺和噻吩-2-碳酰亚胺为原料,设计并合成了以1,8-萘酰亚胺- N-(2-噻吩酰亚胺)乙酰-4-morpholine-1,8-萘酰亚胺(TMN)为基料的多功能荧光探针,用于检测Co2+、F−和CN−。TMN在MeCN中表现出优异的稳定性,对Co2+、F−和CN−具有“开-关”模式。TMN的线性响应范围为0-3和4-19 μM,对Co2+的检测限为0.21 μM;对F−的检测限为0-5和5-22 μM,对CN−的检测限为0.36 μM;对CN−的检测限为0-10和10-25 μM,对CN−的检测限为0.49 μM。TMN还能识别实际样品中的Co2+、F−和CN−。最后,深入探讨了TMN检测Co2+、F−和CN−的可能传感机制。这些结果表明,TMN有可能成为一种灵敏、选择性地监测金属阳离子和阴离子的化学传感器,并可用于实际样品的检测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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