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https://doi.org/10.1002/anie.202200343
Title: | Synergistic Generation and Accumulation of Triplet Excitons for Efficient Ultralong Organic Phosphorescence | Authors: | Chen, Junru Chen, Xiaojie Cao, Lei Deng, Huangjun Chi, Zhenguo Liu, Bin |
Keywords: | Science & Technology Physical Sciences Chemistry, Multidisciplinary Chemistry Delayed Fluorescence Monomeric Phosphorescence Synergistic Effect Triplet Excitons Ultralong Organic Phosphorescence ROOM-TEMPERATURE PHOSPHORESCENCE CRYSTALLIZATION-INDUCED PHOSPHORESCENCE PERSISTENT EMISSION CRYSTAL COLOR |
Issue Date: | 13-Jun-2022 | Publisher: | WILEY-V C H VERLAG GMBH | Citation: | Chen, Junru, Chen, Xiaojie, Cao, Lei, Deng, Huangjun, Chi, Zhenguo, Liu, Bin (2022-06-13). Synergistic Generation and Accumulation of Triplet Excitons for Efficient Ultralong Organic Phosphorescence. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 61 (24). ScholarBank@NUS Repository. https://doi.org/10.1002/anie.202200343 | Abstract: | The traditional method to achieve ultralong organic phosphorescence (UOP) is to hybrid nπ* and ππ* configurations in appropriate proportion, which are contradictory to each other for improving efficiency and lifetime of phosphorescence. In this work, through replacing the electron-donating aromatic group with a methoxy group and combining intramolecular halogen bond to promote intersystem crossing and suppress non-radiative transition, an efficient UOP molecule (2Br-OSPh) has been synthesized with the longest lifetime and brightest UOP among its isomers. As compared to CzS2Br, which has a similar substituted position of bromine atom and a larger kisc (the rate of intersystem crossing), the smaller ΔETT* (the energy gap between monomeric phosphorescence and aggregated state phosphorescence) in 2Br-OSPh could accelerate the transition from T1 to T1*. This research indicates that both generation and accumulation of triplet excitons play an important role in realizing efficient UOP materials. | Source Title: | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | URI: | https://scholarbank.nus.edu.sg/handle/10635/246057 | ISSN: | 1433-7851 1521-3773 |
DOI: | 10.1002/anie.202200343 |
Appears in Collections: | Elements Staff Publications |
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