Polymeric ultralong organic phosphorescence(UOP)with persistent emission is of great importance in practical applications.However,achieving good water-resistance for long-term environmental stability is a formidable c...Polymeric ultralong organic phosphorescence(UOP)with persistent emission is of great importance in practical applications.However,achieving good water-resistance for long-term environmental stability is a formidable challenge.In this contribution,through tailoring the alkyl-chain length of the hardeners and emitters,polymeric UOPs with varying crosslinking density and hydrophobic effect were obtained.Notably,all the polymers show no obvious decrease in UOP emission after high temperature-humidity test(85◦C/85%relative humidity for 7 days).Detailed investigations demonstrate that the rigid covalent crosslinking networks suppress the quenching of triplet excitons while the hydrophobic microenvironment affords good water/moisture-resistance ability.Moreover,the polymers with superior processability are successfully applied as optical coatings,prepreg,and afterglow displays.With this work,we provide a new strategy to promote the long-term stability of polymeric UOP materials in high-temperature-humidity conditions.展开更多
基金Key-Area Research and Development Program of Guangdong Province,Grant/Award Number:2023B0101030002Shenzhen R&D Project,Grant/Award Number:JSGGZD20220822100001002Guangdong Basic and Applied Basic Research Foundation,Grant/Award Number:2022A1515110927。
文摘Polymeric ultralong organic phosphorescence(UOP)with persistent emission is of great importance in practical applications.However,achieving good water-resistance for long-term environmental stability is a formidable challenge.In this contribution,through tailoring the alkyl-chain length of the hardeners and emitters,polymeric UOPs with varying crosslinking density and hydrophobic effect were obtained.Notably,all the polymers show no obvious decrease in UOP emission after high temperature-humidity test(85◦C/85%relative humidity for 7 days).Detailed investigations demonstrate that the rigid covalent crosslinking networks suppress the quenching of triplet excitons while the hydrophobic microenvironment affords good water/moisture-resistance ability.Moreover,the polymers with superior processability are successfully applied as optical coatings,prepreg,and afterglow displays.With this work,we provide a new strategy to promote the long-term stability of polymeric UOP materials in high-temperature-humidity conditions.
