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Department of Chemistry, UGC Sponsored Centre for Advanced Studies-1, Guru Nanak Dev University, Amritsar, India
; Fax: +91 (0)183 2258820
; Tel: +91 (0)183 2258802 9 ext. 3205
Dalton Trans., 2013,42, 981-986
24 Aug 2012,
21 Sep 2012
First published online
21 Sep 2012
A heteroditopic chemosensor 2 based on a thiacalixcrown with a 1,3-alternate conformation has been synthesized and shows a selective fluorescence turn-off response with Fe3+ ions in mixed aqueous media. Furthermore, the 2–Fe3+ complex can be used as a chemosensing system for the detection of Li+ and cysteine based on two different approaches. Moreover, the sequence addition of Fe3+ and Li+ triggers an Fe3+/Li+ switchable on-off-on fluorescence chemosensor with negative allosteric regulations.
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