| 초록 |
A diphenylpyrimidine molecule (DPP-6C12) was synthesized by covalently attaching two tridodecyl benzoate tails (6C12) at the both sides of the diphenylpyrimidine (DPP) moiety. Peculiar phase transition behaviors of DPP-6C12 and their origins were investigated with the combined techniques of thermal, scattering, spectroscopic, and microscopic analyses. On the basis of the experimental results and analyses, it was realized that a butterfly-shaped DPP-6C12 formed three ordered phases: a plastic crystal phase (PK), a crystal phase (K), and a liquid crystal phase (Φ). By breaking the molecular symmetry and coplanarity of DPP-6C12, peculiar monotropic phase transition behaviors were observed. This work was supported by a grant from the Korea Institute of Science and Technology (KIST) Institutional Program (2Z04320), Basic Science Research Program (2013R1A1A2007238), SW Fusion Components R&D Program (MOTIE-10047806), BK21Plus Program, Korea. |
