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A Turn‐On Fluorescent Rhodamine‐acyl Hydrazide for Selective Detection of Cu 2+ Ions
Author(s) -
Yoon Jung Won,
Jeong Hyuk,
Lee Min Hee
Publication year - 2017
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.11087
Subject(s) - fluorescence , chemistry , rhodamine , metal ions in aqueous solution , aqueous solution , hydrolysis , ion , rhodamine b , hydrazide , photochemistry , turn (biochemistry) , metal , inorganic chemistry , catalysis , organic chemistry , physics , quantum mechanics , photocatalysis , biochemistry
We present a rhodamine‐based probe that can detect Cu 2+ ions via Cu 2+ ‐promoted hydrolysis in aqueous solutions. In solution, the probe is non‐fluorescent and colorless, but gives a strong fluorescence at 586 nm and shows a color change to pink on the addition of Cu 2+ ions. We demonstrate that the rhodamine‐based probe undergoes Cu 2+ ‐promoted hydrolysis with a moderate reaction time (within 3 min) and provides a fluorescence off–on change, even in the presence of other competitive metal ions. The rhodamine‐based probe shows a linear correlation between increasing fluorescence at 586 nm and the Cu 2+ concentration, and can detect Cu 2+ at nanomolar levels (10 nM ) in CH 3 CN : H 2 O (v/v, 90:10).