Journal
TALANTA
Volume 81, Issue 1-2, Pages 714-721Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2010.01.005
Keywords
Guanine; Diazonium; Anion; Cation; Difunctional colorimetric receptor
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Funding
- CSIR, New Delhi [01(2258)/08/EMR-II]
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The first guanine-based difunctional colorimetric receptor 8-[(4-nitrophenyl)azo]guanine (receptor 1) was designed, synthesized and characterized by IR, UV-vis, H-1 NMR and mass spectrometric analysis. The synthesized receptor 1 was able to recognize Cu-II, Zn-II and acetate ion through visible color changes in its DMSO and DMSO-H2O (95:5, v/v) solution. The binding affinity of the receptor 1 with the chosen analytes has been estimated in terms of binding constants through non-linear fittings of corresponding UV-vis titration data while the binding mode of the same was studied through H-1 NMR spectral studies. (C) 2010 Elsevier B.V. All rights reserved.
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