A reversible fluorescent Hg2+/K+ switch that works as keypad lock in the presence of F− ion

Manoj Kumar; Rajesh Kumar; Vandana Bhalla

doi:10.1039/B914821C

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Chemical Communications

Issue 47, 2009

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A reversible fluorescent Hg²⁺/K⁺ switch that works as keypad lock in the presence of F⁻ ion

Manoj Kumar , Rajesh Kumar and Vandana Bhalla

Chem. Commun., 2009, 7384-7386

DOI: 10.1039/B914821C
Received 22 Jul 2009, Accepted 20 Oct 2009
First published on the web 06 Nov 2009

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Abstract
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A thiacalix[4]arene based fluorescent chemosensor 3 of 1,3-alternate conformation bearing two dansyl groups and a crown-5 ring behaves as an “On–Off” reversible switch for two chemical inputs Hg²⁺ and K⁺ ions and mimics a molecular level keypad lock in the presence of F⁻ ions.

Supplementary Info

¹H/¹³C NMR, FAB mass, selectivity graphs for Hg²⁺ ion, pictorial representation of “On-Off”reversible switch, ¹H NMR studies, fluorescence spectra of differentsequence of ionic inputs
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Chemical Communications

A reversible fluorescent Hg²⁺/K⁺ switch that works as keypad lock in the presence of F⁻ ion

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