Aggregation-induced circularly polarized luminescence and delayed fluorescence enabled by activating high-level reverse intersystem crossing - 文章详情页

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Circularly　polarized　luminescence　(CPL)　materials　with　delayed　fluorescence　have　attracted　much　attention　due　to　their　ability　to　efficiently　trap　triplet　state　excitons,　thereby　improving　the　photoluminescence　quantum　yields　of　CPL　materials.　However,　much　effort　has　been　normally　focused　on　the　utilization　of　T1　excitons　but　seldom　on　the　utilization　of　higher　excited　triplet　state　Tn　(n ＞ 1)　excitons.　Rational　manipulation　of　higher　excited　triplet　state　Tn　(n ＞ 1)　excitons　and　suppression　of　Kasha＇s　rule　of　CPL　materials　remains　a　major　challenge.　Herein,　two　gold　complex　enantiomers　((R/S)-BPAuBC)　based　on　axially　chiral　binaphthyls　and　3,6-Di-tert-butylcarbazole　groups　are　synthesized　and　systematically　investigated.　These　materials　exhibit　aggregation-induced　circularly　polarized　delayed　fluorescence.　Circularly　polarized　delayed　fluorescence　was　found　to　be　enabled　by　activating　high-level　reverse　intersystem　crossing　(hRISC).　The　anti-Kasha　phosphorescence　at　77　K　proves　that　the　exciton　has　a　large　population　in　the　high-lying　triplet　state　T2,　which　allows　the　effective　hRISC　process　to　cross　back　to　the　singlet　state　S1　and　emit　delayed　fluorescence. In　addition,　CPL　“on–off”　switching　is　further　achieved　in　nanoparticles　by　acid–base　stimulus,　showing　its　potential　as　an　acid–base　responsive　material.　©　2024　The　Author(s).　Aggregate　published　by　SCUT,　AIEI　and　John　Wiley　&　Sons　Australia,　Ltd.

关键词：

high-level reverse intersystem crossing delayed fluorescence aggregation-induced emission circularly polarized luminescence anti-Kasha

作者机构：

[ 1 ] [Wang K.]Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry, College of Chemistry and Life Science, Beijing University of Technology, Beijing, China
[ 2 ] [Ou X.]Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
[ 3 ] [Niu X.]Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry, College of Chemistry and Life Science, Beijing University of Technology, Beijing, China
[ 4 ] [Wang Z.]Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
[ 5 ] [Song F.]Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry, College of Chemistry and Life Science, Beijing University of Technology, Beijing, China
[ 6 ] [Dong X.]State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, China
[ 7 ] [Guo W.-J.]State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China
[ 8 ] [Peng H.-Q.]State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China
[ 9 ] [Zhao Z.]State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, China
[ 10 ] [Lam J.W.Y.]Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
[ 11 ] [Sun J.]Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
[ 12 ] [Wu H.]Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
[ 13 ] [Yu S.-Y.]Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry, College of Chemistry and Life Science, Beijing University of Technology, Beijing, China
[ 14 ] [Li F.]State Key Laboratory of Natural Medicines, College of Engineering, China Pharmaceutical University, Nanjing, China
[ 15 ] [Tang B.Z.]School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Guangdong, Shenzhen, China

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