Stimulus-responsive luminescent materials have attracted considerable attention owing to their intensive applications in diverse fields.However,most of the reported materials are based on short-lived luminescence,whil...Stimulus-responsive luminescent materials have attracted considerable attention owing to their intensive applications in diverse fields.However,most of the reported materials are based on short-lived luminescence,while those based on the switch between two different types of afterglows are still very rare.Herein,we report a one dimensional coordination polymer(1)as the first switch compound with reversible conversion between room temperature phosphorescence(RTP)and delayed fluorescence(DF)trigged by solvent exchange.The as-synthesized 1 shows a blue DF(463 nm)emission with a lifetime of 55.6 ms,which can be converted to a RTP emission(503 nm,3.2 ms)via water vapor fumigation or exposing to wet air.Detailed studies reveal that fumigation can make part of the DMSO molecules of 1 be exchanged by H_(2)O molecules,which changes the singlet–triplet energy difference(ΔE_(st)),thereby realizing the conversion from DF to RTP.Remarkably,the initial luminescence can be restored by DMSO vapor fumigation and this reversible switch property can be used for advanced data encryption and decryption.The work provides fresh opportunities for the development of long-lived luminescence switches.展开更多
Several phenylselenyl esters were selected as precursors of acyl radicals and synthesised by our established method. Treatment of these phenylselenyl esters with tributyltinhydride and AIBN ge...Several phenylselenyl esters were selected as precursors of acyl radicals and synthesised by our established method. Treatment of these phenylselenyl esters with tributyltinhydride and AIBN generated the corresponding acyl radicals, which were found to proceed in 5 exo trig or 6 endo trig cyclisations to afford high yields of cyclopentanones and cyclohexanones, The substitution groups on the substrates have played an important role on the regioselectivity of cyclisations.展开更多
基金supported by the National Natural Science Foundation of China(21871038)the instrumental analysis fund of DUT.
文摘Stimulus-responsive luminescent materials have attracted considerable attention owing to their intensive applications in diverse fields.However,most of the reported materials are based on short-lived luminescence,while those based on the switch between two different types of afterglows are still very rare.Herein,we report a one dimensional coordination polymer(1)as the first switch compound with reversible conversion between room temperature phosphorescence(RTP)and delayed fluorescence(DF)trigged by solvent exchange.The as-synthesized 1 shows a blue DF(463 nm)emission with a lifetime of 55.6 ms,which can be converted to a RTP emission(503 nm,3.2 ms)via water vapor fumigation or exposing to wet air.Detailed studies reveal that fumigation can make part of the DMSO molecules of 1 be exchanged by H_(2)O molecules,which changes the singlet–triplet energy difference(ΔE_(st)),thereby realizing the conversion from DF to RTP.Remarkably,the initial luminescence can be restored by DMSO vapor fumigation and this reversible switch property can be used for advanced data encryption and decryption.The work provides fresh opportunities for the development of long-lived luminescence switches.
文摘Several phenylselenyl esters were selected as precursors of acyl radicals and synthesised by our established method. Treatment of these phenylselenyl esters with tributyltinhydride and AIBN generated the corresponding acyl radicals, which were found to proceed in 5 exo trig or 6 endo trig cyclisations to afford high yields of cyclopentanones and cyclohexanones, The substitution groups on the substrates have played an important role on the regioselectivity of cyclisations.
