highly sensitive and selective colorimetric and off–on fluorescent chemosensor for Cu²⁺ based on rhodamine B derivative

A new rhodamine B derivative colorimetric and fluorescent sensor (1) was synthesized by condensation reaction of rhodamine B hydrazide and 2,4-dihydroxybenzaldehyde, which showed reversible and highly selective and sensitive recognition toward Cu²⁺ over other examined metal ions. Upon addition of Cu...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2011-08, Vol.156 (2), p.546-552
Main Authors: Xu, Zhihong, Zhang, Like, Guo, Rui, Xiang, Tiancheng, Wu, Changzeng, Zheng, Zhi, Yang, Fengling
Format: Article
Language:English
Subjects:
absorbance
Actuators
Buffer solutions
Color
Colorimetry
condensation
copper
Derivatives
dimethyl sulfoxide
fluorescence
Hydrazides
metal ions
Rhodamine
Sensors
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Summary:A new rhodamine B derivative colorimetric and fluorescent sensor (1) was synthesized by condensation reaction of rhodamine B hydrazide and 2,4-dihydroxybenzaldehyde, which showed reversible and highly selective and sensitive recognition toward Cu²⁺ over other examined metal ions. Upon addition of Cu²⁺, sensor 1 exhibits remarkably enhanced absorbance intensity and color change from colorless to pink in DMSO and MeCN aqueous buffer solution or pure MeCN, and shows significant off–on fluorescence accompanied by color changes from colorless to orange in MeCN. The sensor 1 was also successfully applied to the determination of Cu²⁺ in water samples.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2011.01.066