Driving Triplet State Population in Benzothioxanthene Imide Dyes: Let's twist!
Résumé
Controlling the formation of photoexcited triplet states is critical for many (photo)chemical and physical applications. Here, we demonstrate that a permanent out-of-plane distortion of the benzothioxanthene imide (BTI) dye promotes intersystem crossing by increasing spin-orbit coupling. This manipulation was achieved through a subtle chemical modification, specifi-cally the bay-area methylation. Consequently, this simple yet efficient approach expands the catalog of known molecular engineering strategies for synthesizing heavy atom-free, dual redox-active, yet still emissive and synthetically accessible photosensitizers.
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Chemistry A European J - 2024 - Puchán Sánchez - Driving Triplet State Population in Benzothioxanthene Imide Dyes Let s.pdf (4.13 Mo)
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