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Study of the Zn II Complexes of 1,1′‐Binaphthyl‐Based Schiff Bases: Fluorescent Detection of Thiocyanate
Author(s) -
Zhao Haihang,
Cao Yuan,
Zhang Yanjing,
Zhou Yangyang,
Zhao Gang,
Pu Lin
Publication year - 2018
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201800479
Subject(s) - chemistry , thiocyanate , fluorescence , diastereomer , schiff base , inorganic chemistry , condensation , crystallography , stereochemistry , physics , quantum mechanics , thermodynamics
Two diastereomeric Schiff bases ( Sa,R )‐ 2 and ( Sa,S )‐ 2 are prepared from the condensation of ( S )‐3,3′‐diformyl‐1,1′‐bi‐2‐naphthol with d ‐ and l ‐2‐phenylglycinol. Upon coordination with Zn 2+ , ( Sa,R )‐ 2 shows much greater fluorescence than ( Sa,S )‐ 2 does. The effect of various anions on the fluorescence of these Zn 2+ complexes is studied. It is found that ( Sa,S )‐ 2 exhibits large fluorescence enhancement in the presence of thiocyanate but not with other anions. This compound can be used as a sensitive as well as selective fluorescent probe for thiocyanate that is of significant environment and health importance. Spectroscopic studies have revealed interesting dimeric [2+3] structures of these complexes.