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Ratiometric Sensing of Hg2+ Based on the Calix[4]arene of Partial Cone Conformation Possessing a Dansyl Moiety

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journal contribution
posted on 06.11.2008, 00:00 by Abhimanew Dhir, Vandana Bhalla, Manoj Kumar
A new fluorescent chemosensor based on the calix[4]arene of partial cone conformation possessing a dansyl moiety has been synthesized. The chemosensor demonstrates selective optical recognition of Hg2+ and Cu2+ in two contrasting modes. The receptor exhibited ratiometric sensing of Hg2+ and “ON−OFF” type of fluorescence behavior in the presence of Cu2+. The compound behaves as a fluorescent molecular switch upon chemical inputs of Hg2+ and Cu2+ ions.