压致变色聚集诱导发光材料

Piezochromic aggregation-induced emission materials

聚集诱导发光化合物分子具有特殊的螺旋桨形扭曲构象结构,导致其很难在结晶状态下进行紧密堆砌,使得其结晶结构容易在外力的作用发生改变,致使其分子能级水平和发光光谱发生变化,产生压致发光变色现象.因此,聚集诱导发光化合物是压致发光变色材料的一个重要来源.压致变色聚集诱导发光材料是一类重要的压致发光变色材料,其既具有压致发光变色的性能,又具有聚集诱导发光的性能.它是一类智能材料,在应力传感、商标防伪和发光器件等领域具有重要的潜在应用,近年来受到人们极大的关注.本文分类介绍了近年来压致变色聚集诱导发光材料的研究进展.

Aggregation-induced emission molecules have a common propeller-like twisted conformation feature, which makes their molecular packings relatively loose. Their crystalline structures are easily destroyed by the planarization of the molecular conformation under external pressure, resulting in increased molecular conjugation, thereby facilitating a red-shift of the photoluminescence spectra, i.e. piezochromic luminescent properties. Aggregation-induced emission compounds can be expected to become an important resource of piezochromic luminescent materials. Piezochromic aggregation-induced emission materials are an important class of smart materials and have many important potential applications in mechanosensors, security inks and optoelectronic devices. This review summarized and discussed the recent advances in piezochromic aggregation-induced emission materials.