期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 11, 期 42, 页码 9861-9870出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b909914j
关键词
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资金
- National Science Fund [20425415]
- 20425415), National Science Foundation of China (NSFC) [20490220, 20573022, 20774022]
- Leading Scientist Project of Shanghai [07XD14002]
- National Basic Research Program of China [2005CB623800]
- MOE [20050246010]
Two-dimensional correlation infrared spectroscopy (2DIR) and a newly developed perturbation correlation moving window (PCMW) technique was employed to study the precise supramolecular self-assembly nature of poly[di(butyl)vinyl terephthalate] (PDBVT), a novel thermotropic liquid crystalline polymer which can self-assemble into a two-dimensional hexagonal columnar (2D Phi(H)) phase without conventional mesogens. PCMW had found the weak phase transition temperature to be about 85 degrees C, and further divided the S or anti-S shaped spectral variations into three evolving stages. 2DIR results indicated that carbonyl groups acted as the starting point of molecular motions upon heating, and had a significant influence on the formation of the 2D Phi(H) phase. Based on the additional motion sequence of symmetric and asymmetric C-H stretching vibrations, the whole self-assembly process of PDBVT on the mesoscale, whose backbones experienced extension-distortion-slight extension consecutive motions was elucidated.
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