Two barbituric acid derivatives of the similar color and fluorescence have been synthesized with aggregation induced emission (AIE) behaviour. Among them, CB-Ph exhibits crystallization-induced emission enhancement (CIEE) induced by ethanol. Molecular dynamics simulations show that the conformation of CB-Ph in the aggregated state is propeller-like, which prevents strong interaction between molecules and is beneficial to produce CIEE effect. Under the stimulation of dichloromethane (DCM), the solid CB-Ph changes from crystalline to amorphous, resultantly, the emission color of CB-Ph changes from yellow (554 nm) to orange (590 nm) and the emission intensity decreases by 91%. Furthermore, it was found that the emission color and intensity of CB-Ph can be restored by fumigation with ethanol. The crystalline state and amorphous state of CB-Ph can be converted into each other by the treatment with DCM and ethanol. CB-Me takes similar molecule structure to CB-Ph and shows the same emission wavelength with CB-Ph. However, it shows no change in emission color or intensity by the treatment with DCM or ethanol. Based on these two compounds, a new data encryption-decryption techniques developed, in which based on CIEE effect of CB-Ph is used as password ink due to CIEE effect and CB-Me is used as camouflage material without CIEE property.

已经合成了具有相似颜色和荧光的两种巴比妥酸衍生物，其具有聚集诱导发射（AIE）行为。其中，CB-Ph表现出乙醇诱导的结晶诱导的发射增强（CIEE）。分子动力学模拟表明，CB-Ph的聚集态呈螺旋桨状，阻止了分子之间的强相互作用，有利于产生CIEE效应。在二氯甲烷（DCM）的刺激下，固体CB-Ph从晶体变为无定形，因此，CB-Ph的发射颜色从黄色（554 nm）变为橙色（590 nm），发射强度降低了91％。此外，发现可以通过用乙醇熏蒸来恢复CB-Ph的发射颜色和强度。通过用DCM和乙醇处理，CB-Ph的结晶态和非晶态可以相互转化。CB-Me具有与CB-Ph相似的分子结构，并显示出与CB-Ph相同的发射波长。然而，通过用DCM或乙醇处理，其显示出发射颜色或强度没有变化。基于这两种化合物，开发了一种新的数据加解密技术，其中基于CB-Ph的CIEE效应由于具有CIEE效果，因此可以用作密码墨水，而具有CIEE特性的CB-Me可以用作迷彩材料。