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Theoretical and experimental investigation on the intersystem crossing kinetics in benzothioxanthene imide luminophores, and their dependence on substituent effects

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Abstract

In spite of their remarkable luminescence properties, benzothioxanthene imide (BTXI, an imide containing rylene chromophores) derivatives have been largely overlooked compared to their perylene bisimide and naphthalene bisimide counterparts. Thus, their detailed photophysics are much less understood. In this paper, we show how relatively simple structural modifications of the backbone of BTXIs can lead to impressive variations in their inter-system crossing kinetics. Thus, through rational engineering of their structure, it is possible to obtain a triplet formation quantum yield that reaches unity, making BTXI a promising class of compounds for triplet-based applications (photodynamic therapy, electroluminescence, etc.).

Graphical abstract: Theoretical and experimental investigation on the intersystem crossing kinetics in benzothioxanthene imide luminophores, and their dependence on substituent effects

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Article information


Submitted
25 Feb 2020
Accepted
09 Apr 2020
First published
09 Apr 2020

Phys. Chem. Chem. Phys., 2020, Advance Article
Article type
Paper

Theoretical and experimental investigation on the intersystem crossing kinetics in benzothioxanthene imide luminophores, and their dependence on substituent effects

L. A. Galán, J. M. Andrés Castán, C. Dalinot, P. S. Marqués, P. Blanchard, O. Maury, C. Cabanetos, T. Le Bahers and C. Monnereau, Phys. Chem. Chem. Phys., 2020, Advance Article , DOI: 10.1039/D0CP01072C

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