X‐ray diffraction from the uniaxial and biaxial nematic phases of bent‐core mesogens
X‐ray diffraction from the uniaxial and biaxial nematic phases of bent‐core mesogens
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弯曲核介晶单轴和双轴向列相的 X 射线衍射
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
Satyendra Kumar
中科院分区：
文献类型：
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作者：
B. Acharya;Shin;Satyendra Kumar
刚性弯芯介晶所表现出的单轴和双轴取向相的X射线衍射图案使用分子形状因子的简单模型和修改的洛伦兹结构因子来计算。X射线衍射图强烈依赖于分子轴的排列程度以及分子平面的取向。X射线衍射可以明确地用于识别双轴晶相，研究单轴-双轴相变，并估计晶相的序参数。
X‐ray diffraction patterns for the uniaxial and biaxial nematic phases exhibited by rigid bent‐core mesogens were calculated using a simple model for the molecular form factor and a modified Lorentzian structure factor. The X‐ray diffraction patterns depend strongly on the extent of the alignment of the molecular axes as well as the orientation of molecular planes. The X‐ray diffraction can be unequivocally used to identify the biaxial nematic phase, study the uniaxial–biaxial phase transition, and estimate the order parameters of the nematic phase.