Sensitizing the phosphorescence of pyromellitic diimide through non-covalent halogen-carbonyl interactions

In this study, we efficiently sensitize pyromellitic diimide's triplets by cocrystallizing with heavy bromine-substituted small aromatics. The resulting halogen bonding interactions mediate an external heavy atom effect, leading to remarkable ambient phosphorescence with one of the highest quan...

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Bibliographic Details
Published in:CrystEngComm 2024-09, Vol.26 (37), p.5129-5132
Main Authors: Hati, Debranjan, Garain, Swadhin, Ansari, Shagufi Naz, Kongasseri, Anju Ajayan, George, Subi J
Format: Article
Language:English
Subjects:
Bromine
Carbonyls
Diimide
Phosphorescence
Sensitizing
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Summary:In this study, we efficiently sensitize pyromellitic diimide's triplets by cocrystallizing with heavy bromine-substituted small aromatics. The resulting halogen bonding interactions mediate an external heavy atom effect, leading to remarkable ambient phosphorescence with one of the highest quantum yields reported to date. Herein, a halogen-bonding-assisted heavy-atom effect was introduced to sensitize the locally-excited triplet state of pyromellitic diimide, achieving efficient phosphorescence, with one of the highest quantum yield in a cocrystal.
ISSN:1466-8033
1466-8033
DOI:10.1039/d4ce00812j