Studies on the Mesophases of OOBPD by X-Ray Diffraction Method

Abstract

X-ray diffraction studies on the mesophases of OOBPD have been reported in this paper. This compound has four smectic phases and a nematic phase along with three crystalline phases. The smectic phases have been identified from texture study and from X-ray diffraction photographs of unoriented and magnetically oriented samples. Orientational distribution function f(β) and order parameters (P ₂), (P ₄) for the nematic phase have been determined. Layer thickness, intermolecular spacings and tilt angles have also been calculated.