期刊
SOFT MATTER
卷 6, 期 11, 页码 2413-2420出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c003310c
关键词
-
类别
资金
- NSF [DMR-9971143]
- MIUR
- ESRF
- Universita Politecnica delle Marche
We present X-ray diffraction evidence for clusters exhibiting a skewed cybotactic supramolecular structure in the nematic phase of the butyloxy-phenyl diester, ODBP-Ph-OC(4), a bent core mesogenic diester of the nonlinear diol 2,5-bis-(p-hydroxyphenyl)-1,3,4-oxadiazole (ODBP). The temperature dependence of the off-meridional four-spot pattern shows that the tilt angle in the cybotactic clusters changes with temperature. The correlation lengths exhibit no evidence of critical behavior but there is no underlying smectic C phase in ODBP-Ph-OC(4). The tilted cybotactic clusters persist throughout the 85 degrees C wide nematic phase, and even remain evident in the supercooled nematic. This inherently biaxial supramolecular structure-clusters of stratified and tilted mesogens-embedded in an otherwise translationally disordered nematic host medium may account for the NMR biaxiality observed in nematic phases of ODBP mesogens.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据