Force-Induced Turn-On Persistent Room-Temperature Phosphorescence in Purely Organic Luminogen

Research of purely organic room-temperature phosphorescence (RTP) materials has been a hot topic, especially for those with stimulus response character. Herein, an abnormal stimulus-responsive RTP effect is reported, in which, purely organic luminogen of Czs-ph-3F shows turn-on persistent phosphorescence under grinding. Careful analyses of experimental results, coupled with the theoretical calculations, show that the transition of molecular conformation from quasi-axial to quasi-equatorial of the phenothiazine group should be mainly responsible for this exciting result. Furthermore, the applications of stylus printing and thermal printing are both successfully realized, based on the unique RTP effect of Czs-ph-3F.

Automated summary

Research on abnormal stimulus-responsive organic room-temperature phosphorescence effect is conducted, showing persistent phosphorescence of Czs-ph-3F under grinding. Experimental results and theoretical calculations indicate that the transition of molecular conformation of the phenothiazine group is mainly responsible for this result. Furthermore, applications of stylus printing and thermal printing based on the unique RTP effect of Czs-ph-3F are successfully realized.