Imine containing benzophenone scaffold as an efficient chemical device to detect selectively Al3+
Date
2013
Authors
Sinha, S.
Koner, R.R.
Kumar, S.
Mathew, J.
Monisha, P.V.
Kazi, I.
Ghosh, S.
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Journal article
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RSC Advances, 2013; 3(2):345-351
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Abstract
A benzophenone-based Schiff base 1 has been utilized as afluorescence chemosensor for the selective detection of Al3+. Theprobe was synthesized in one step, and found to be non-fluorescent due to a combination of photoinduced electrontransfer (PET), excited state intramolecular proton transfer(ESIPT) andE/Zisomerism. Upon addition of Al3+to a methanolicsolution of 1, the development of a strong fluorescence signalwas observed with an attractive glowing green emission. This wasdue to the inhibition of PET, ESIPT andE/Zisomerism, and theactivation of chelation enhanced fluorescence (CHEF). The quan-tum yield of 1–Al3+was found to be 0.17. The selectivity wastested with 24 different metal and non-metal ions, and estab-lished using various spectroscopic tools. The strong affinity ofcompound 1 for Al3+was also proven by1H NMR and massspectroscopy.
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Copyright 2013 The Royal Society of Chemistry