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New Neutral Receptors for Fluoride Based on Calix[4]arene Bearing Thiourea and Amide
Author(s) -
ShunYing Liu,
KuoXi Xu,
YongBing He,
HaiJuan Qin,
LingZhi Meng
Publication year - 2005
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.200590321
Subject(s) - chemistry , thiourea , amide , fluoride , halogen , hydrogen bond , inorganic chemistry , affinities , selectivity , stoichiometry , receptor , phosphate , ion , medicinal chemistry , stereochemistry , molecule , organic chemistry , biochemistry , alkyl , catalysis
Two‐armed neutral anion receptors ( 4 , 5 ), calix[4]arenes bearing thiourea and amide binding sites, were prepared and examined their anion‐binding ability by the UV‐vis spectra. The results of non‐linear curve fitting and Job plot indicate that 4 or 5 forms 1:1 stoichiometry complex with fluoride by hydrogen bonding interactions. Receptors 4 and 5 have an excellent selectivity for fluoride but have no binding ability with acetate, dihydrogen phosphate and the halogen anions (Cl ‐ , Br ‐ , I ‐ ).