A series of highly sensitive and selective fluorescent and colorimetric “off-on” chemosensors for Cu (II) based on rhodamine derivatives

Several rhodamine-B (C.I. Basic Violet 10) hydrazide derivatives were employed as specific fluorescent and colorimetric chemosensors for Cu 2+ in neutral buffered media. The probes exhibited selective “off-on” type changes in both absorption and emission spectra toward Cu 2+ ions compared to other m...

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Bibliographic Details
Published in:Dyes and pigments 2010-10, Vol.87 (2), p.164-172
Main Authors: Dong, Ming, Ma, Tian-Hua, Zhang, Ai-Jiang, Dong, Yu-Man, Wang, Ya-Wen, Peng, Yu
Format: Article
Language:English
Subjects:
Copper ion
Fluorescent
Naked-eye
Rhodamine
Structure–activity relationship
UV–visible
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Summary:Several rhodamine-B (C.I. Basic Violet 10) hydrazide derivatives were employed as specific fluorescent and colorimetric chemosensors for Cu 2+ in neutral buffered media. The probes exhibited selective “off-on” type changes in both absorption and emission spectra toward Cu 2+ ions compared to other metal cations, which was attributed to transformation of the non-fluorescent and colorless spirolactam derivative to the ring-opened, fluorescent, pink coloured amide. Further studies of structure-activity relationship revealed that the designated acyl hydrazone skeleton moiety shared by these chemosensors, derived from the dye hydrazide and salicylaldehyde analogues, determines the selectivity for Cu 2+ over other cations.
ISSN:0143-7208
1873-3743
DOI:10.1016/j.dyepig.2010.03.015