Published

ou physique

Electrochromic and electrofluorochromic properties of a new boron dipyrromethene-ferrocene conjugate

Published on - Electrochimica Acta

Authors: Olivier Galangau, Isabelle Fabre-Francke, Sorin Munteanu, Cécile Dumas-Verdes, Gilles Clavier, Rachel Méallet-Renault, Robert Bernard Pansu, Frantisek Hartl, Fabien Miomandre

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A new boron dipyrromethene-ferrocene (BODIPY-Fc) conjugate with pentafluorophenyl as the meso substituent and two Fc termini was synthesized and its spectroscopic and electrochemical features were analysed. An intramolecular charge transfer from the donor Fc to the acceptor BODIPY has been predicted by theory and confirmed experimentally, leading to efficient fluorescence quenching when the dyad is in the neutral state. Fluorescence can be triggered by oxidizing both ferrocenyl units either chemically or electrochemically. Eventually, a fully reversible fluorescence switch is evidenced by coupling TIRF microscopy with electrolysis in an electrochemical cell.