| 초록 |
To understand the relationships between chemical structures, molecular packing structures, and photophysical properties of organic materials, a butterfly shaped diphenylpyrimidine molecule (abbreviated as DPP-6C12) was newly designed synthesized. By breaking the molecular symmetry and coplanarity of DPP-6C12, peculiar monotropic phase transitions were observed. The structure identification of DPP-6C12 and the molecular packing symmetry in the unit cell were supported by two-dimensional wide-angle X-ray diffraction (2D XRD) and selected area electron diffraction (SAED) experiments, which were further confirmed by the computer simulations in the real and reciprocal spaces. Finally, we demonstrated that the photophysical properties of DPP-6C12 can be tuned by controlling the molecular packing structures with simple thermal treatments. This work was supported by the BRL 2015042417, LHRT 2016H1D5A910159, Mid-Career Researcher Program 2016R1A2B2011041 and the BK21 Plus program. |
