Ratiometric Sensing of Hg2+ Based on the Calixarene of Partial Cone Conformation Possessing a Dansyl Moiety
journal contributionposted on 06.11.2008, 00:00 by Abhimanew Dhir, Vandana Bhalla, Manoj Kumar
A new fluorescent chemosensor based on the calixarene 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.