%0 Journal Article %1 Wu_2022 %A Wu, Zhu %A Dinkelbach, Fabian %A Kerner, Florian %A Friedrich, Alexandra %A Ji, Lei %A Stepanenko, Vladimir %A Würthner, Frank %A Marian, Christel M. %A Marder, Todd B. %D 2022 %I Wiley %J Chem. Eur. J. %K myown %N 30 %R 10.1002/chem.202200525 %T Aggregation-Induced Dual Phosphorescence from (o-Bromophenyl)-Bis(2,6-Dimethylphenyl)Borane at Room Temperature %U https://doi.org/10.1002%2Fchem.202200525 %V 28 %X Designing highly efficient purely organic phosphors at room temperature remains a challenge because of fast non-radiative processes and slow intersystem crossing (ISC) rates. The majority of them emit only single component phosphorescence. Herein, we have prepared 3 isomers (o, m, p-bromophenyl)-bis(2,6-dimethylphenyl)boranes. Among the 3 isomers (o-, m- and p-BrTAB) synthesized, the ortho-one is the only one which shows dual phosphorescence, with a short lifetime of 0.8 ms and a long lifetime of 234 ms in the crystalline state at room temperature. Based on theoretical calculations and crystal structure analysis of o-BrTAB, the short lifetime component is ascribed to the T1M state of the monomer which emits the higher energy phosphorescence. The long-lived, lower energy phosphorescence emission is attributed to the T1A state of an aggregate, with multiple intermolecular interactions existing in crystalline o-BrTAB inhibiting nonradiative decay and stabilizing the triplet states efficiently.

@article{Wu_2022, abstract = {Designing highly efficient purely organic phosphors at room temperature remains a challenge because of fast non-radiative processes and slow intersystem crossing (ISC) rates. The majority of them emit only single component phosphorescence. Herein, we have prepared 3 isomers (o, m, p-bromophenyl)-bis(2,6-dimethylphenyl)boranes. Among the 3 isomers (o-, m- and p-BrTAB) synthesized, the ortho-one is the only one which shows dual phosphorescence, with a short lifetime of 0.8 ms and a long lifetime of 234 ms in the crystalline state at room temperature. Based on theoretical calculations and crystal structure analysis of o-BrTAB, the short lifetime component is ascribed to the T1M state of the monomer which emits the higher energy phosphorescence. The long-lived, lower energy phosphorescence emission is attributed to the T1A state of an aggregate, with multiple intermolecular interactions existing in crystalline o-BrTAB inhibiting nonradiative decay and stabilizing the triplet states efficiently.}, added-at = {2022-06-14T13:15:54.000+0200}, author = {Wu, Zhu and Dinkelbach, Fabian and Kerner, Florian and Friedrich, Alexandra and Ji, Lei and Stepanenko, Vladimir and Würthner, Frank and Marian, Christel M. and Marder, Todd B.}, biburl = {https://www.bibsonomy.org/bibtex/2ab05f5d8f1ce8dff549c6f3885e9a9ef/wuerthner_group}, doi = {10.1002/chem.202200525}, interhash = {a06a2d104876bfa8ebe6b0d9c18c6322}, intrahash = {ab05f5d8f1ce8dff549c6f3885e9a9ef}, journal = {Chem. Eur. J.}, keywords = {myown}, month = apr, number = 30, publisher = {Wiley}, timestamp = {2022-06-14T13:22:33.000+0200}, title = {Aggregation-Induced Dual Phosphorescence from (o-Bromophenyl)-Bis(2,6-Dimethylphenyl)Borane at Room Temperature}, url = {https://doi.org/10.1002%2Fchem.202200525}, volume = 28, year = 2022 }