向列型液晶的Raman光谱研究

Investigation of Raman scattering in nematic liquid crystal

报道了国产向列型液晶MBBA和EBBA的Raman谱与温度的关系。提出了一种适用于取向的向列型液晶分子振动相关函数和转动相关函数的分离理论。此理论应用于MBBA液晶相和液相的分子振动和转动弛豫的实验研究表明这种分离方法是可行的。

Temperure dependence of Eaman spectra of nematic liquid crystals MBBA and EBBA made in China is reported. The spectral behaviours of these two types of liquid crystals are quite similar. Separation theory of vibrational and rotational correlation function which could only be applied in isotropic liquid phase is extended to anisotropieally oriented nematic liquid crystals. The experimental results of applying the extended theory to study vibrational and rotational relaxation of molecules in nematic and liquid phases of MBBA show the feasibility of the extended theory.