Herein, we report a new dibenzo[a,c]phenazine-phenothiazine dyad (BNPTZ) bridged by a C–N single bond, which realizes AIEE, polymorphism, mechanochromsim and high sensitivity to hydrostatic pressure, due to the twisted D-A structure. BNPTZ exhibits AIEE activity in THF/H₂O system, owing to aggregation-inhibited non-radiative relaxation channels of the excited states. Fortunately, two types of single crystals of BNPTZ with distinctive luminescence were cultivated and the effect of different conformation and complicated intermolecular interactions on luminescent property was analysed. BNPTZ demonstrates responses to both shearing force and hydrostatic pressure. Interestingly, two different crystalline phases are involved in the color-changing process upon shearing and fuming. Upon shearing, the crystal powder suffers the luminescence color change from orange-yellow (565 nm) to redness (604 nm), because of the phase transition from OY-phase to amorphous triggered by external force. When fuming, the amorphous phase would recover to YG-phase unexpectedly. When subjecting two single crystals to hydrostatic pressure, the OY-phase single crystal underwent a clear color switch from yellow to orange and eventually to red. The YG-phase single crystal displayed a different color alteration from yellow-green to orange and further to red. Both of the two single crystals exhibited relatively high sensitivity to pressure with a wide spectral shift over 100 nm. Up to now, BNPTZ is a rare dyad that achieves polymorphs with high sensitivity to pressure.

在本文中，我们报道了一个新的通过C–N单键桥接的二苯并[ a，c ]吩嗪-吩噻嗪二聚体（BNPTZ），由于DA结构扭曲，实现了AIEE，多态性，机械色谱和对静水压力的高敏感性。BNPTZ在THF / H _2中表现出AIEE活性O系统，由于受激发态的聚集抑制的非辐射弛豫通道。幸运的是，培养了两种类型的具有独特发光的BNPTZ单晶，并分析了不同构象和复杂的分子间相互作用对发光性能的影响。BNPTZ展示了对剪切力和静水压力的响应。有趣的是，在剪切和发烟时，两种不同的结晶相参与了变色过程。剪切后，由于外力触发从OY相到非晶相的相变，晶体粉末的发光颜色从橙黄色（565 nm）变为红色（604 nm）。冒烟时，非晶相会意外地恢复为YG相。当两个单晶受到静水压力时，OY相单晶的颜色从黄色变为橙色，最终变为红色。YG相单晶显示出不同的颜色变化，从黄绿色到橙色，再到红色。这两个单晶都显示出对压力的相对较高的灵敏度，并且在100 nm范围内具有宽光谱位移。到目前为止，BNPTZ是一种稀有的二元组，可实现对压力高度敏感的多晶型物。