| 초록 |
Molecular packing structures, and photophysical properties of organic materials, a butterfly shaped diphenylpyrimidine molecule was newly synthesized. The chemical structure of DPP-6C12 was determined by 1H nuclear magnetic resonance spectroscopes (NMR), and its thermal transition behavior was also monitored by differential scanning calorimetry and solid-state 13C NMR. Morphological properties were studied by tow-dimensional (2D) wide angle X-ray diffraction and computer simulation. From the combined the experimental results, it was realized that the peculiar phase transition behaviors of a butterfly-shaped diphenylpyrimidine molecule were originated from the nonplanarity of the DPP-6C12 aromatic mesogen. Additionally, 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, MOTIE/KDRC 10051334, and the BK21 Plus program. |
