期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 124, 期 -, 页码 492-499出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2014.01.024
关键词
Anion binding; Urea and indole-based receptor; H-bonding; H-1 NMR and UV-Visible spectroscopy; Fluorescence; Cyclic voltammetry
类别
资金
- CSIR-Supra Institutional research grant under CSIR-XIIth five year plan [ESC-0203/09]
- DST fast track project [GAP-183112]
- CSIR-CMERI institutional project [OLP-182112]
- CSIR-CMERI
Indole and urea based two organic receptors have been synthesized by an easy synthetic process. These two receptors have strong sensitivity and selectivity for several bio-relevant anions. Receptor 1 and 2 were synthesized from indole-2-carboxylic acid and p-anisidine respectively, which are low cost starting materials. Receptor 1 can selectively sense anions like F-, OAc- and H2PO4-, while receptor 2 can only sense F- and H2PO4-. Both receptors are silent toward anions like Cl-, Br-, I- and NO3-. It is the difference in their shape and size which are responsible for different anion sensing. The nature of these host-guest type interactions was analyzed by convenient spectrophotometric techniques like UV-Vis, fluorescence, H-1 NMR, Fr-IR studies and also confirmed by electrochemical techniques like cyclic voltammetry studies of the two ligand receptors with convenient anions. Between receptor 1 and 2, receptor 2 was crystallo-graphically characterized also. (C) 2014 Elsevier B.V. All rights reserved.
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