Journal
TALANTA
Volume 75, Issue 4, Pages 1015-1020Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2007.12.041
Keywords
anion recognition; colorimetric sensor; thiourea; aqueous; toothpaste
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An efficient calorimetric sensor with a thiourea moiety as binding sites and p-nitrophenylhydrazine as a signaling unit has been synthesized by only one single-step procedure. Selectivity for anions with the distinct geometry (tetrahedral, trigonal planar and spherical) has been investigated in dry DMSO and even in DMSO/H2O (95:5, v/v) solutions through the naked-eye experiment, UV-vis titration and H-1 NMR titration techniques. In particular, the fluoride of toothpaste can be detected qualitatively by the sensor 1. (c) 2008 Elsevier B.V. All rights reserved.
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