The development of tunable molecule separation membranes requires materials with remote controllability and ultra-high separation capability. In this paper, a novel photoswitchable metal organic framework (MOF) thin film (Cu2(AzoBPDC)2) was prepared by liquid phase epitaxial layer-by-layer assembly to realize the reversible remote-controlled switching. The azobenzene side groups in the Cu2(AzoBPDC)2 thin film showed excellent reversible photoswitching performance under UV (365 nm) and Vis (450 nm) irradiation, achieving the remote-controlled mode of the diffusion flux of polar gas molecules in the MOF thin film.
可调控分子分离膜的开发需要具有远程可控性和超高分离能力的材料。本文通过液相外延逐层组装法制备了新型光开关金属有机框架(MOF)薄膜(Cu2(AzoBPDC)2),实现了可逆遥控开关。Cu2(AzoBPDC)2薄膜中的偶氮苯侧基在紫外(365 nm)和可见光(450 nm)照射下表现出优异的可逆光开关性能,实现了极性气体分子在MOF薄膜中扩散通量的遥控模式。