Marine fungi are important members of the marine microbiome,which have been paid growing attention by scientists in recent years.The secondary metabolites of marine fungi have been reported to contain rich and diverse...Marine fungi are important members of the marine microbiome,which have been paid growing attention by scientists in recent years.The secondary metabolites of marine fungi have been reported to contain rich and diverse compounds with novel structures(Chen et al.,2019).Aspergillus terreus,the higher level marine fungus of the Aspergillus genus(family of Trichocomaceae,order of Eurotiales,class of Euro・tiomycetes,phylum of Ascomycota).展开更多
The development and enrichment of high-performance organic fluorophores that simultaneously possess thermally activated delayed fluorescence(TADF)and aggregation-induced emission(AIE)properties is going pursued but re...The development and enrichment of high-performance organic fluorophores that simultaneously possess thermally activated delayed fluorescence(TADF)and aggregation-induced emission(AIE)properties is going pursued but remains a great challenge due to severe exciton quenching.Herein,a systematical investigation on imidazole moiety has successfully given rise to a series of highly efficient imidazolebased TADF-AIE luminogens for the first time.The attachment of two cyano functionalities on imidazole moiety can significantly increase the electron-withdrawing ability,so as to realize TADF emissions with small singlet-triplet energy gaps(ΔEST)values.Meanwhile,the installation of a steric hindrance group at N1 position of imidazole moiety can twist the geometry between imidazole and phenyl bridge,thus transforming imidazole derivative from an aggregation-caused quenching emitter into an AIE luminogen.Consequently,the non-doped organic light-emitting diodes(OLEDs)utilizing these TADF-AIE luminogens as emitters exhibit outstanding skyblue and green emissions,with external quantum efficiency(EQE)as high as 20.0%and low efficiency roll-off(EQE at 1000 cd m−2,16.1%).These values represent the state-of-the-art performance for all imidazole-based OLED devices,which illustrates the significant potential of imidazole derivatives in assembling high-performance OLEDs.展开更多
基金This work was supported by the Natural Science Foundation of Guangdong Province(No.2018A030307046)the Basic Research Project of Shenzhen Science and Technology Innovation Commission(No.JCYJ20190813105005619)+2 种基金the Shenzhen Dapeng New District Industrial Development Fund(No.KY20180203)the Shenzhen Dapeng New District Scientific and Technological Research and Development Fund(No.KJYF202001-07)the the Innovation and Development Project about Marine Economy Demostration of Zhanjiang City(No.XM-202008-01B1),China.
文摘Marine fungi are important members of the marine microbiome,which have been paid growing attention by scientists in recent years.The secondary metabolites of marine fungi have been reported to contain rich and diverse compounds with novel structures(Chen et al.,2019).Aspergillus terreus,the higher level marine fungus of the Aspergillus genus(family of Trichocomaceae,order of Eurotiales,class of Euro・tiomycetes,phylum of Ascomycota).
基金National NSF of China,Grant/Award Numbers:22031007,22005204Sichuan Science and Technology Program,Grant/Award Numbers:2020YJ0245,2020YJ0302。
文摘The development and enrichment of high-performance organic fluorophores that simultaneously possess thermally activated delayed fluorescence(TADF)and aggregation-induced emission(AIE)properties is going pursued but remains a great challenge due to severe exciton quenching.Herein,a systematical investigation on imidazole moiety has successfully given rise to a series of highly efficient imidazolebased TADF-AIE luminogens for the first time.The attachment of two cyano functionalities on imidazole moiety can significantly increase the electron-withdrawing ability,so as to realize TADF emissions with small singlet-triplet energy gaps(ΔEST)values.Meanwhile,the installation of a steric hindrance group at N1 position of imidazole moiety can twist the geometry between imidazole and phenyl bridge,thus transforming imidazole derivative from an aggregation-caused quenching emitter into an AIE luminogen.Consequently,the non-doped organic light-emitting diodes(OLEDs)utilizing these TADF-AIE luminogens as emitters exhibit outstanding skyblue and green emissions,with external quantum efficiency(EQE)as high as 20.0%and low efficiency roll-off(EQE at 1000 cd m−2,16.1%).These values represent the state-of-the-art performance for all imidazole-based OLED devices,which illustrates the significant potential of imidazole derivatives in assembling high-performance OLEDs.
