Bicolour fluorescent molecular sensor for cations: design and experimental validation
Fecha
2021-07-02Autor
Freixa Fernández, Zoraida
Monrabal, Francesc
Gómez Cadenas, Juan J.
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Physical Chemistry Chemical Physics : (2021)
Resumen
Molecular entities whose fluorescence spectra are different when they bind metal cations are termed
bicolour fluorescent molecular sensors. The basic design criteria of this kind of compound are presented
and the different fluorescent responses are discussed in terms of their chemical behaviour and electronic
features. These latter elements include intramolecular charge transfer (ICT), formation of intramolecular
and intermolecular excimer/exciplex complexes and Fo ̈rster resonance energy transfer (FRET). Changes in
the electronic properties of the fluorophore based on the decoupling between its constitutive units upon
metal binding are also discussed. The possibility of generating fluorescent bicolour indicators that can
capture metal cations in the gas phase and at solid–gas interfaces is also discussed