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Ratiometric detection of Hg2+ ions: an allosterically synchronized Hg2+/Li+ switch based on thiacalix[4]crown
Manoj Kumar1, Naresh Kumar, Vandana Bhalla
1Department of Chemistry, UGC Sponsored Centre for Advance Studies-1, Guru Nanak Dev University, Amritsar-143005, Punjab, India. mksharmaa@yahoo.co.in
Abstract:
A new heteroditopic chemosensor based on the 1,3-alternate conformation of thiacalix[4]crown shows a ratiometric fluorescence response towards Hg(2+) ions. Further, a negative allosteric behaviour between Hg(2+)/Li(+) ions is observed. Thus, metal ion exchange triggers a Hg(2+)/Li(+) switchable fluorescent chemosensor.
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