Title

Synthesis, Characterization and Texture Observations of Calamitic Liquid Crystalline Compounds

Authors

Authors

M. A. Qaddoura;K. D. Belfield

Abbreviated Journal Title

Int. J. Mol. Sci.

Keywords

liquid crystalline texture; nematic phase; smectic phase; SIDE-CHAIN; MOLECULAR-STRUCTURE; POLYSILOXANES; SUBSTITUENTS; HYDROGELS; INDUCTION; DIFFUSION; BEHAVIOR; Biochemistry & Molecular Biology; Chemistry, Multidisciplinary

Abstract

Several divinylic mesogenic monomers were synthesized based on coupling the monomer 4-(4-pentenyloxy)benzoic acid with chlorohydroquinone, 2,5-dihydroxyacetophenone, methylhydroquinone or 2-methoxyhydroquinone. This resulted in novel mesogens of phenylene esters with different lateral substituent groups. The effect of the lateral substituent group on the thermotropic phase behavior for these liquid crystalline compounds was investigated using DSC and optical polarized microscopy. All the mesogens proved to have a wide nematic liquid crystalline range. Only the phenylene ester, which has a methoxy lateral substituent, exhibited both nematic and smectic phases. Structural confirmation of all new derivatives was accomplished by H-1- and C-13-NMR spectroscopic analysis, along with CH elemental analysis.

Journal Title

International Journal of Molecular Sciences

Volume

10

Issue/Number

11

Publication Date

1-1-2009

Document Type

Article

Language

English

First Page

4772

Last Page

4788

WOS Identifier

WOS:000272191200009

ISSN

1422-0067

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