| 초록 |
A series of diketopyrrolopyrrole (DPP) luminogen amphiphiles were newly designed and synthesized by a single-step anionic exchange reaction to control the photoluminescence properties in both solution and solid states. In response to thermal, mechanical, and chemical stimuli, multicolor emission was successfully demonstrated by engineering well-defined supramolecular structures. Phase transition from the metastable amorphous solid to the stable orthorhombic crystal of [DP-Im][Br] enabled reversibly patternable light emission. Because of the smectic crystalline phase of [DP-Im][TFSI], the linearly polarized light emission is also apparent by shear coating. Finally, we demonstrated the development of smart sensors for food or vaccine packaging that can detect thermal attack by combining [DP-Im][Br] and [DP-Im][TFSI]. This work was supported by BK21 FOUR, Mid-Career Researcher Program (2021R1A2C200942), and NATO Science for Peace and Security Program (G5759). |
