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用于选择性灵敏检测汞的罗丹明和功能化偶氮苯缩合荧光新型受体：实验与理论相结合的研究

Rhodamine and functionalised azobenzene condensed fluorescent novel receptor for the selective and sensitive detection of Hg: a combined experimental and theoretical study.

作者信息

Sahu Pradeep, Chaturwedi Amit Kumar, Patel Ashok Raj, Pandey Abhilash, Sharma Vanshika, Matore Balaji Wamanrao, Singh Jagadish, Roy Partha Pratim, Hait Milan, Patra Goutam Kumar

机构信息

Department of Chemistry, Dr C.V. Raman University Kota Bilaspur Chhattisgarh-495113 India

Department of Chemistry, Guru Ghasidas Vishwavidyalaya Bilaspur Chhattisgarh-495009 India

出版信息

RSC Adv. 2025 Aug 27;15(37):30466-30481. doi: 10.1039/d5ra03890a. eCollection 2025 Aug 22.

DOI:10.1039/d5ra03890a
PMID:40880977
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12381559/
Abstract

Rhodamine dye has a high absorption coefficient, fluorescence quantum yield, photostability, and extended wavelengths that make it a promising fluorescent probe. A rhodamine and functionalised azobenzene condensed novel chemosensor L has been reported for the first time to detect Hg in aqueous ethanol optically in this investigation. Chemosensor L's fluorescence activation in response to Hg is due to the suppression of PET and CHEF processes and the change from spirolactam to ring-opened amide. Time-resolved photoluminescence studies confirmed the PET and CHEF processes, whereas C-NMR and infrared spectroscopy confirmed the spirolactam ring opening. The opened spirolactam ring forms a 1 : 1 binding complex with Hg, as shown by its high binding constant. L can be successfully applied for the formation of a INHIBIT type of logic gate and real sample analysis.

摘要

罗丹明染料具有高吸收系数、荧光量子产率、光稳定性和较宽的波长，这使其成为一种有前景的荧光探针。在本研究中，首次报道了一种罗丹明与功能化偶氮苯缩合的新型化学传感器L，用于在乙醇水溶液中光学检测汞。化学传感器L对汞的荧光激活是由于PET和CHEF过程的抑制以及从螺内酰胺到开环酰胺的转变。时间分辨光致发光研究证实了PET和CHEF过程，而碳核磁共振和红外光谱证实了螺内酰胺环的开环。开环的螺内酰胺环与汞形成1∶1的结合络合物，其结合常数较高。L可成功应用于形成抑制型逻辑门和实际样品分析。

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