the fluorophore is encased in the macrocage frame. Therefore, they are called molecular gyrotops. The rotational dynamics of the fluorophore in the crystalline state were observed by temperature-dependent dielectric relaxation, and the fluorophore was found to be static in C14TTO2, while restricted and facile rotation was observed for C18TTO2 and C22TTO2, respectively. The solid-state fluorescence quantum
使用
噻吩并
噻吩-二氧化物桥连的巨笼化合物C14
TTO2、C18
TTO2和C22
TTO2 的晶体实现了在结晶状态下显示固态荧光和介电弛豫的荧光介电材料,其中第一个数字表示笼中烷基链的长度。在这些分子中,荧光团即使在结晶状态下也可以旋转,因为荧光团被包裹在巨笼框架中。因此,它们被称为分子陀螺。通过温度依赖的介电弛豫观察了结晶态荧光团的旋转动力学,发现荧光团在C14
TTO2 中是静态的,而在C14
TTO2中观察到受限且容易旋转分别为C18
TTO2和C22
TTO2。固态荧光量子产率随着烷基链长度的增加而降低,表明荧光强度明显取决于荧光团的动力学。