Optical Microscopy, X-Ray Diffraction, and Dielectric Permittivity Studies in Binary Mixtures of Nematogens Showing Induced Smectic Phase | Zendy

Suchismita Datta Sarkar | Zendy; Basana Choudhury | Zendy

Open Access

Optical Microscopy, X-Ray Diffraction, and Dielectric Permittivity Studies in Binary Mixtures of Nematogens Showing Induced Smectic Phase

Author(s) -

Suchismita Datta Sarkar,

Basana Choudhury

Publication year - 2011

Publication title -

physics research international

Language(s) - English

Resource type - Journals

eISSN - 2090-2239

pISSN - 2090-2220

DOI - 10.1155/2011/786849

Subject(s) - materials science , dielectric , phase (matter) , optical microscope , diffraction , phase diagram , permittivity , liquid crystal , binary system , dielectric permittivity , anisotropy , optics , polarized light microscopy , binary number , analytical chemistry (journal) , scanning electron microscope , composite material , chemistry , chromatography , organic chemistry , optoelectronics , physics , arithmetic , mathematics

The binary mixtures of nematogenic compounds 4-n-pentyl phenyl 4-n′-hexyloxy benzoate (ME6O.5) and 4-cyanophenyl 4-heptyl benzoate (CPHB) show the presence of induced smectic phase. In the present paper we report the phase diagram of the binary system (ME6O.5+CPHB) obtained by polarizing optical microscopy as well as the results of X-ray diffraction and static dielectric permittivity measurements on the system throughout the entire composition range. The observed variation of dielectric anisotropy with molar concentration in the induced smectic phase region is explained by assuming molecular associations in the mixture which is supported by our measurements of layer spacing in the induced smectic phase by X-ray diffraction studies

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