Journal
ANALYTICA CHIMICA ACTA
Volume 663, Issue 1, Pages 77-84Publisher
ELSEVIER
DOI: 10.1016/j.aca.2010.01.025
Keywords
Chromogenic sensor; Naked-eye detection; Fluoride and cyanide detection; Thiourea; Aqueous solution
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Novel chromogenic thiourea based sensors 4,4'-bis-[3-(4-nitrophenyl) thiourea] diphenyl ether 1 and 4,4'-bis-[3-(4-nitrophenyl) thiourea] diphenyl methane 2 having nitrophenyl group as signaling unit have been synthesized and characterized by spectroscopic techniques and X-ray crystallography. The both sensors show visual detection, UV-vis and NMR spectral changes in presence of fluoride and cyanide anions in organic solvent as well as in aqueous medium. The absorption spectra indicated the formation of complex between host and guest is in 1:2 stoichiometric ratios. (C) 2010 Elsevier B.V. All rights reserved.
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