Journal
TETRAHEDRON LETTERS
Volume 54, Issue 32, Pages 4232-4236Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2013.05.134
Keywords
Cation sensors; 8-Hydroxyquinoline; Triethylene glycol; Al3+ detection
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Funding
- Council of Scientific and Industrial Research (CSIR), New Delhi [NWP 0035]
- CSIR, New Delhi
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A triethylene glycol modified quinoline ester (PQTEG) is synthesised, which acts as a colorimetric sensor for Al3+ ions with a detection limit of 8 x 10(-7) M in acetonitrile/water (95:5, v/v) solvent system. A visible, colour change from colourless to deep yellow was observed on binding of PQTEG with the metal ion. The unshared electron pairs of oxygen and nitrogen in triethylene glycol ester of quinoline provide a high binding affinity towards Al3+ and serves as the binding site. The metal binding was further confirmed from H-1 NMR studies and IR spectroscopic studies. (C) 2013 Elsevier Ltd. All rights reserved.
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