Terphenyl based fluorescent chemosensor for Cu2+ and F− ions employing excited state intramolecular proton transfer
摘要:
A new terphenyl based bifunctional fluorescent chemosensor 3a has been synthesized, which demonstrates selective optical recognition of Cu2+ and F- ions in two contrasting modes. The compound shows highly selective 'On-Off' switchable behavior toward Cu2+ ions and 'On-Off-On' behavior toward F- ions among various cations and anions tested. The detection limits of chemosensor for Cu2+ and F- ions are found to be 100 nM and 10 nM, respectively. (C) 2010 Elsevier Ltd. All rights reserved.