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A Highly Selective Colorimetric Sensor for Cu 2+ Based on Phenolic Group Biscarbonyl Hydrazone
Author(s) -
Li Junjian,
Guo Ying,
Yao Hong,
Lin Qi,
Xie Yongqiang,
Wei Taibao,
Zhang Youming
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.201200741
Subject(s) - chemistry , hydrazone , salicylaldehyde , copper , stoichiometry , naked eye , selectivity , metal ions in aqueous solution , fluorescence , ion , metal , inorganic chemistry , analytical chemistry (journal) , hydrazide , nuclear chemistry , detection limit , stereochemistry , schiff base , chromatography , organic chemistry , catalysis , physics , quantum mechanics
A novel copper selective sensor 2 based on hydrazide and salicylaldehyde has been designed and prepared. Sensor 2 behaves a single selectivity and sensitivity in the recognition for Cu 2+ over other metal ions such as Fe 3+ , Hg 2+ , Ag + , Ca 2+ , Zn 2+ , Pb 2+ , Cd 2+ , Ni 2+ , Co 2+ , Cr 3+ and Mg 2+ in DMSO. The distinct color change and the rapid changement of fluorescence emission provide naked‐eyes detection for Cu 2+ . The UV‐vis data indicate that 1:2 stoichiometry complex is formed by sensor 2 and Cu 2+ . The association constant K s was 3.51×10 4 mol −1 ·L. The detection limitation of Cu 2+ with the sensor 2 was 2.2×10 −7 mol·L −1 . The sensing of Cu 2+ by this sensor was found to be reversible, with the Cu 2+ ‐induced color being lost upon addition of EDTA.