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Title |
Nido-Carboranes: Donors for Thermally Activated Delayed Fluorescence |
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Author list |
Nghia, Nguyen Van; Jan, Saibal Sujith, Surendran Ryu, Ji Yeon Lee, Junseong Lee; Lee, Sang Uck Lee, Min Hyung |
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Publication date |
2018/09 |
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Citation information |
Angewandte Chemie International Edition, 57, 12483 (2018) |
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DOI |
10.1002/anie.201806922 |
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Graphical Abstract |
![[최근연구업적] Angew. Chem. Int. Ed. (2018).png](/upload/cheditor/chem/2792/20180917165520_vnpnqwis.png)
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Abstract |
An approach to the design of nido-carborane-based luminescent compounds that can exhibit thermally activated delayed fluorescence (TADF) is proposed. 7,8-Dicarba-nido-undecaboranes (nido-carboranes) having various 8-R groups (R = H, Me, i-Pr, Ph) are appended to the meta or para position of the phenyl ring of the dimesitylphenylborane (PhBMes2) acceptor, forming donoracceptor compounds (nido-m1m4 and nido-p1p4). The bulky 8-R group and meta substitution of the nido-carborane are essential to attain a highly twisted arrangement between the donor and acceptor moieties, leading to a very small energy splitting between the singlet and triplet excited states (EST < 0.05 eV for nido-m2, -m3, and -p3). These compounds exhibit efficient TADF with microsecond-range lifetimes. In particular, nido-m2 and -m3 display aggregation-induced emission (AIE) with TADF properties.
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