Dynamic Crosslinked Phosphorescent Poly(vinyl alcohol)-Terpyridine Films with Enhanced Mechanical Properties and Tunable Shape Memory  

作　　者：Meng Wei Wei-Hao Feng Chen Yu Zhen-Yi Jiang Guang-Qiang Yin Wei Lu Tao Chen 

机构地区：[1]Key Laboratory of Advanced Marine Materials,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo,315201,China [2]School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing,100049,China [3]School of Materials Science and Chemical Engineering,Ningbo University,Ningbo,315211,China

出　　处：《Chinese Journal of Polymer Science》2024年第10期1595-1601,I0015,共8页高分子科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.22205249);the Sino-German Mobility Program(No.M-0424);Ningbo International Cooperation Project(No.2023H019)。

摘　　要：Achieving versatile room temperature phosphorescence(RTP)materials,especially with tunable mechanical properties and shape memory is attractive and essential but rarely reported.Here,a strategy was reported to realize multi-functional RTP films with multicolor fluorescence,ultralong afterglow,adjustable mechanical properties,and shape memory through the synergistic dynamic interaction of lanthanide(Ln~Ⅲ)-terpyridine coordination,borate ester bonds,and hydrogen bondings in a poly(vinyl alcohol)(PVA)matrix.By varying the amount of borax,the mechanical properties of the films could be finely controlled due to the change of crosslinking degree of dynamic borate ester bonds in PVA.The assembly and disassembly of borate ester bonds upon the trigger of borax and acid were applied as reversible linkage to achieve programmable shape memory behavior.In addition,the films displayed both fascinating multicolor fluorescence and ultralong afterglow characteristics due to the presence of Ln III doping and confinement of terpyridine in PVA.This study provides a new avenue to impart modulable mechanical strength and shape memory to RTP materials.

关 键 词：Room temperature phosphorescence materials Dynamic bonds Multicolor fluorescent Tunable mechanical properties Shape memory 

分 类 号：TB383.2[一般工业技术—材料科学与工程]