Theoretical and Experimental Investigation on the Intersystem Crossing Kinetics in Benzothioxanthene Imide Luminophores, and Their Dependence on Substituents Effects

26 February 2020, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

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.).

Keywords

BTXI
singlet oxygen generation capability
intersystem crossing (ISC)

Supplementary materials

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