A highly sensitive and selective fluorescent chemosensor for the sequential recognition of Zn2+ and S2− in living cells and aqueous media

A new highly selective chemosensor 1 (E)-5-((2-hydroxybenzylidene)amino)-1H-imidazole-4-carboxamide was designed and synthesized for the sequential recognition of Zn2+ and S2− in a near-perfect aqueous media. The sensor 1 exhibited a green color fluorescence in the presence of Zn2+. The detection li...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Vol. 255; pp. 3108 - 3116
Main Authors: Yun, Jin Yeong, Jo, Tae Geun, Han, Jiyeon, Jang, Hyo Jung, Lim, Mi Hee, Kim, Cheal
Format: Journal Article
Language:English
Published: Elsevier B.V 01.02.2018
Subjects:
Cell imaging
Fluorescence
Sequential detection
Sulfide
Theoretical calculations
Zinc
Sulfide
Fluorescence
Cell imaging
Theoretical calculations
Zinc
Sequential detection
ISSN:0925-4005, 1873-3077
Online Access:Get full text
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Summary:A new highly selective chemosensor 1 (E)-5-((2-hydroxybenzylidene)amino)-1H-imidazole-4-carboxamide was designed and synthesized for the sequential recognition of Zn2+ and S2− in a near-perfect aqueous media. The sensor 1 exhibited a green color fluorescence in the presence of Zn2+. The detection limit (1.18μM) of 1 for Zn2+ is much lower than World Health Organization guideline (76μM) in drinking water. 1 can detect and quantify Zn2+ in real water samples and the sensing mechanism of Zn2+ by 1 was explained by DFT calculations. Moreover, resulting 1-Zn2+ complex can detect hydrogen sulfide through turn-off fluorescent change, without any anion interference. The detection limit (2.60μM) of 1-Zn2+ complex for S2− was much lower than EPA guideline (7.8mM) by odor in drinking water. Furthermore, sensor 1 could detect sequentially Zn2+ and S2− in living cells.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2017.09.136