Division of Applied Chemistry & Frontier Chemistry Center, Faculty of Engineering, Hokkaido University , Sapporo, Hokkaido 060-8628, Japan.
J Am Chem Soc. 2017 Jun 7;139(22):7452-7455. doi: 10.1021/jacs.7b04073. Epub 2017 May 26.
Herein, a novel mechano-responsive luminescent (MRL) material based on crystal-to-crystal phase transitions between crystals of a chiral and those of a centrosymmetric space group, accompanied by a change of emission properties, is described. Initially, a gold complex containing a biphenyl moiety, which exhibits an achiral structure in solution, afforded an orange-emitting amorphous phase together with a viscous isotropic oil after evaporation of the solvent. Upon pricking, the orange-emitting oil spontaneously crystallized either in a centrosymmetric or in a chiral space group while simultaneously changing the emission properties. Remarkably, grinding the chiral crystals induced a solid-state phase transition to the achiral crystals under concomitant changes of the emission properties.
本文描述了一种基于手性晶体和中心对称空间群晶体之间的晶型转变，并伴有发光性质变化的新型机械响应发光（MRL）材料。最初，含有联苯部分的金配合物在溶液中表现出非手性结构，在溶剂蒸发后得到橙色发射的无定形相和粘性各向同性油。在针刺时，橙色发射油自发结晶为中心对称或手性空间群，同时发光性质也发生变化。值得注意的是，研磨手性晶体在发光性质变化的同时，诱导固态相转变为非手性晶体。
