CationResponsive Fluorescent Sensors

Authors: B Valeur F Badaoui E Bardez J Bourson P Boutin A Chatelain I Devol B Larrey J P Lefèvre A Soulet

Publish Date: 1997

Volume: , Issue: , Pages: 195-220

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Abstract

Various examples of chargetransfer fluorescent probes for cation sensing are described These probes are based on cation control of charge transfer in a conjugated donoracceptor fluorophore the bound cation interacting with either the electrondonating group or the electronwithdrawing group Special attention is paid to the understanding of cationinduced photophysical changes in a crowned merocyanine crownetherlinked coumarins 8quinolinol and its derivatives It is emphasized that when the cation interacts with the electrondonating group there is a photodisruption of the interaction between the cation and this group leading to possible photorelease of the cation Optical sensors based on the entrapment of fluorescent indicators of pH eosin Y and potassium PBFI in solgel thin films are also presented

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