Poly(maleic anhydride-alt-vinyl acetate)(PMV)have been found as a kind of non-conjugated photolu-minescent polymer with strong light emission and unique solvatochromic effect,while its photoluminescence orginated from anhydride cluster interacting in a through-space manner.Besides,PMV could also be converted into highly-emissive or dual-emissive PMV salts through alkalization modification with sodium/lithium hydroxide.Yet in this study,self-precipated polymerized PMV microspheres were modified by amidation and imide to break maleic anhydride rings and prepare water-soluble photoluminescent poly(maleamic acid-alt-vinyl acetate)(PMVN)through simple ammonia treatment.PMVN not only exhibited photoluminescent properties in both solution and solid state,but also showed different colors and fluorescence characteristics when dissolved at different temperatures(room temperature,or 85 ℃).Microstructure analysis showed that the structures of PMVN-RT and PMVN-85 were basically the same,yet their fluorescence clusters were significantly different,which might be attributed to their different fluorescence characteristics.In addition,the color of PMVN-RT changed to green after heating,while the fluorescence clusters,solution color and fluorescence characteristics of PMVN-85 showed a trend of transforming into PMVN-RT after being placed at room temperature for 72 h.PMVN was a thermochromic photoluminescent polymer with reversible transformation characteristics.Besides,composite fluorescent hydrogels were prepared and exhibited application prospects in many fields such as temperature sensors,biosensors,disease diagnosis,cell imaging,bionic drive and environmental monitoring.
关键词
马来酸酐-醋酸乙烯酯交替共聚物/荧光水凝胶/自稳定沉淀聚合/发光团簇/蓝/红双发射/聚集诱导发光
Key words
Poly(maleic anhydride-alt-vinyl acetate)(PMV)and its derivatives/Fluorescent hydrogel/Self-stabilized precipitation polymerization/Photoluminescent clusters/Blue and red emission/Aggregation induced emission
维普
万方数据