Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 136, Issue -, Pages 1269-1274Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2014.10.013
Keywords
Dual channel; ICT mechanism; Colorimetric changes
Categories
Funding
- UGC-BSR
- DST-IRHPA
- FIST
- PURSE
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An efficient new dual channel chemosensor 2,3-bis((E)-(1H-indole-3-yl)methyleneamino)maleonitrile (DN) which exhibits selective sensing of F- ions in DMSO, was synthesized by a facile one step condensation reaction of indole-3-carboxaldehyde with diaminomaleonitrile. The probe DN was characterized by elemental analysis, H-1, C-13-NMR, ESI-MS and IR spectral techniques. Upon addition of F-, DN induces remarkable changes in both absorption and fluorescence spectra on the basis of charge transfer mechanism. The receptor DN serves for highly selective, sensitive detection of F- without the interference of other relevant anions. The Job's plot analysis indicates the binding stoichiometry to be 1:1 (host/guest). (C) 2014 Elsevier B.V. All rights reserved.
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