Tetrahedron Letters

A ratiometric fluorescent probe for magnesium employing excited state intramolecular proton transfer

N Singh, N Kaur, RC Mulrooney, JF Callan

Index: Singh, Narinder; Kaur, Navneet; Mulrooney, Ray C.; Callan, John F. Tetrahedron Letters, 2008 , vol. 49, # 47 p. 6690 - 6692

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Citation Number: 94

Abstract

A simple fluorescent sensor has been developed for the ratiometric recognition of Mg2+ in semi-aqueous solution at pH 7.0. The sensor, a Schiff base, undergoes Excited State Intramolecular Proton Transfer (ESIPT) to generate a keto tautomer with proficient Mg2+ binding capability. The sensor displays good selectivity over other metal ions including alkali/alkali earth ions and can measure Mg2+ ion concentration between 2.0 and 30.0 μM ...