Premium
A Highly Selective Colorimetric and Fluorescent Probe for Cu 2+ and Hg 2+ Ions Based on a Distyryl BODIPY with Two Bis(1,2,3‐triazole)amino Receptors
Author(s) -
Shi WenJing,
Liu JianYong,
Ng Dennis K. P.
Publication year - 2012
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201100598
Subject(s) - bodipy , chemistry , fluorescence , ion , metal ions in aqueous solution , binding constant , naked eye , intramolecular force , stokes shift , triazole , stoichiometry , photochemistry , stereochemistry , binding site , organic chemistry , detection limit , biochemistry , physics , quantum mechanics , chromatography
A new distyryl boron dipyrromethene (BODIPY) with two bis(1,2,3‐triazole)amino substituents has been prepared by typical Knoevenagel condensation followed by click reaction. The compound selectively binds to Cu 2+ and Hg 2+ ions in CH 3 CN/H 2 O (1:1 v/v) to give remarkably blueshifted electronic absorption and fluorescence bands as a result of inhibition of the intramolecular charge‐transfer process upon binding to these metal ions. The color changes can be easily seen by the naked eye. The binding stoichiometry between this probe and Cu 2+ ions has been determined to be 1:2 by a Job plot of the fluorescence data with a binding constant of ((6.2±0.6)×10 9 ) M −2 . The corresponding value for Hg 2+ ions is about sixfold smaller.