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Selectively Fluorescent Sensing Behavior of Phenylaza‐15‐crown‐5‐triazolyl Coumarin for Hg 2+ and Fe 3+ in Alcohol and Aqueous Media Respectively
Author(s) -
Zhang Zhijun,
Wang Hui,
Zhang Hengyi,
Liu Yu
Publication year - 2013
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201300216
Subject(s) - chemistry , fluorescence , click chemistry , cycloaddition , alkyne , aqueous solution , metal ions in aqueous solution , 18 crown 6 , photochemistry , azide , coumarin , conjugated system , copper , metal , triazole , nuclear chemistry , inorganic chemistry , ion , polymer chemistry , catalysis , organic chemistry , polymer , physics , quantum mechanics
A π‐conjugated phenylaza‐15‐crown‐5‐triazol‐substituted coumarin fluoroionophore 1 was synthesized by copper(I)‐catalyzed Huisgen alkyne‐azide 1,3‐dipolar cycloaddition (CuAAC "click" reaction). 1 can display selective fluorescence enhancement toward Fe 3+ over Hg 2+ , Cr 3+ and the other metal ions in aqueous solution. In sharp contrast, the fluorescence behavior between Fe 3+ and Hg 2+ is completely reversed in EtOH. That is, Hg 2+ gives the largest fluorescence enhancement over Cr 3+ , Fe 3+ and the other metal ions.