Difluoroboronβ-diketonate(BF2bdk)compounds represent an important class of luminescent materials,whereas their synthesis requires multiple steps,which restrict their application in diverse fields.Here we report a cas...Difluoroboronβ-diketonate(BF2bdk)compounds represent an important class of luminescent materials,whereas their synthesis requires multiple steps,which restrict their application in diverse fields.Here we report a cascade reaction to prepare BF2bdk from aromatic ketones,carboxylic acids,trifluoroacetic anhydride and boron trifluoride diethyl etherate.The cascade reaction is very simple and straightforward to produce BF2bdk with desired functional groups in reasonable isolation yields.Further,when some specific BF2bdk compounds are used as luminescent dopants,organic room-temperature phosphorescence with lifetimes>1.0 s and intense afterglow under ambient conditions can be achieved with the assistance by suitable organic matrices.The dopant-matrix materials exhibit excellent processability into desired patterns and large-area panels,and function as efficient donors of excited state energy transfer for the fabrication of red afterglow materials.展开更多
基金supports from theNational Natural Science Foundation of China(22175194)Shanghai Scientific and Technological Innovation Project(20QA1411600,20ZR1469200)Hundred Talents Program from Shanghai Institute of Organic Chemistry(Y121078).
文摘Difluoroboronβ-diketonate(BF2bdk)compounds represent an important class of luminescent materials,whereas their synthesis requires multiple steps,which restrict their application in diverse fields.Here we report a cascade reaction to prepare BF2bdk from aromatic ketones,carboxylic acids,trifluoroacetic anhydride and boron trifluoride diethyl etherate.The cascade reaction is very simple and straightforward to produce BF2bdk with desired functional groups in reasonable isolation yields.Further,when some specific BF2bdk compounds are used as luminescent dopants,organic room-temperature phosphorescence with lifetimes>1.0 s and intense afterglow under ambient conditions can be achieved with the assistance by suitable organic matrices.The dopant-matrix materials exhibit excellent processability into desired patterns and large-area panels,and function as efficient donors of excited state energy transfer for the fabrication of red afterglow materials.
