共结晶法制备具有多级增强光致发光的双羟萘酸分子晶体驱动器

Constructing a molecular crystal actuator from pamoic acid with multilevel enhanced photoluminescence by cocrystallization

高效的光致发光性能促进了晶体材料的发展.在本文中,我们通过引入溶剂分子报道了两例新的双羟萘酸多组分晶体.通过聚集诱导发射和共结晶诱导发射增强,双羟萘酸多组分晶体的绝对量子产率逐步增强,最高达52.99%,据我们所知,这是目前报道的最大值.此外,随着溶剂分子逃逸,该系统表现出温度依赖的荧光响应和热诱导的机械运动,包括跳跃、摆动、翻转、移动和旋转.本工作提出的引入共结晶组分实现材料发光性能逐级提高的方法对设计刺激响应型光学功能材料具有指导意义.

Over the last two decades,aggregate science[1]focused on photoluminescence properties has achieved tremendous progress on both the theoretical[2,3]and application[4–8]levels.Great efforts have been made on the conversion between the discrete and aggregate states of the molecules[9],on enabling single functions from scratch,and on switching between multifunctions[10–13].Researchers gradually recognized that aggregated structure is crucial to aggregated material properties[14–18].The packing mode of molecules in the aggregate state also affects their luminescence behavior[19–22].However,stepwise enhancement of photoluminescence efficiency by switching between different aggregate states has rarely been investigated.