ArticleChemphyschem : a European journal of chemical physics and physical chemistry2025
Bromo-Heptahelicene-Bis-Thiadiazole: Photophysics, Chiroptics, and Excited-State Dynamics.
Article in Chemphyschem : a European journal of chemical physics and physical chemistry, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
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8 authors.
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Abstract
The synthesis of a [7]helicene bromide derivative with two fused 2,1,3-thiadiazole heterocycles (TD[7]Br) and a comprehensive study of its photophysical and chiroptical characteristics are presented along with a comparison with 9-bromo-carbo[7]helicene ([7]Br) and 2,15-dibromo-carbo[6]helicene ([6]Br). The integration of a bromine heavy atom onto the helicene backbone facilitates efficient singlet-to-triplet conversion allowing to investigate the resulting fluorescence and phosphorescence properties. The steady-state chiroptical features of the systems are demonstrated through electronic circular dichroism and circularly polarized luminescence. Interestingly, a fluorescence quantum yield of 14% is obtained, a 17-fold increase compared to the corresponding bromo-heptacarbohelicene, and phosphorescence dissymmetry factors reach ±1.2 × 10
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