Journal
DYES AND PIGMENTS
Volume 87, Issue 2, Pages 164-172Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2010.03.015
Keywords
Copper ion; Rhodamine; Fluorescent; UV-visible; Naked-eye; Structure-activity relationship
Funding
- National Natural Science Foundation of China [20802029]
- Fundamental Research Funds for the Central Universities [Izujbky-2009-72]
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Several rhodamine-B (C.I. Basic Violet 10) hydrazide derivatives were employed as specific fluorescent and colorimetric chemosensors for Cu2+ in neutral buffered media. The probes exhibited selective off-on type changes in both absorption and emission spectra toward Cu2+ 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 Cu2+ over other cations. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
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