Structure and Dynamics of the Solid States of MBBA

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Abstract
When referring to a fast-cooled (or glassy) liquid crystal (GLC), we mean that if a mesophase of a liquid crystal is cooled sufficiently rapidly to below a certain temperature, an amorphous solid state may be produced that retains a structure similar to that of the starting phase. A selective review of the published results on MBBA is given based on the structural and dynamic concept of the Glc state. The structure of the different modifications due to neutron diffraction and small angle scattering measurements is described. Raman scattering and inelastic incoherent neutron scattering results are presented, and intermolecular vibration spectra are analysed to show the role of relaxation and non-crystallinity of the structure in the coherence formation of phonons.

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