Electrofluorochromism of Surface-Confined Tetrazines Investigated on the Monolayer Scale

Laetitia Guerret-Legras (1) , Baptiste Maillot (2) , Jean Frédéric Audibert (1) , G. V Dubacheva (3) , Laurent Galmiche (1) , Philippe Lang (4) , Fabien Miomandre (1)

1 PPSM - Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires
2 GEC - Laboratoire Géosciences et Environnement Cergy
3 PASTEUR - Processus d'Activation Sélective par Transfert d'Energie Uni-électronique ou Radiatif (UMR 8640)
4 ITODYS (UMR_7086) - Interfaces, Traitements, Organisation et Dynamique des Systèmes

Monolayers of tetrazine terminated alkyl chains have been grafted on ITO through siloxane functions. These monolayers are electroactive and display fluorescence with a maximum close to 560 nm when excited in the visible range. Potential step cycles have been applied and the fluorescence intensity drawn from background and bleaching corrected emission spectra was found to be switched off and on reversibly according to the applied potential. This demonstrates that the luminescence of grafted fluorophores can be electrochemically controlled as it is in solution and the emission intensity can be followed with a good signal to noise ratio even for a monolayer.

Domains: Chemical Sciences; Material chemistry

Laetitia Guerret-Legras, Baptiste Maillot, Jean Frédéric Audibert, G. V Dubacheva, Laurent Galmiche, et al.. Electrofluorochromism of Surface-Confined Tetrazines Investigated on the Monolayer Scale. Journal of Physical Chemistry C, 2019, 123 (48), pp.29255-29261. ⟨10.1021/acs.jpcc.9b08929⟩. ⟨hal-02395117⟩