The biaxial smectic (SmAb) phase in nonsymmetric liquid crystal dimers comprising two rodlike anisometric segments: an unusual behavior

Channabasaveshwar V. Yelamaggad; Indudhara Swamy Shashikala; Doddamane S. Shankar Rao; Geetha G. Nair; Subbarao Krishna Prasad

doi:10.1039/B612132B

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The biaxial smectic (SmA_b) phase in nonsymmetric liquid crystal dimers comprising two rodlike anisometric segments: an unusual behavior†

Channabasaveshwar V. Yelamaggad,*^a Indudhara Swamy Shashikala,^a Doddamane S. Shankar Rao,^a Geetha G. Nair^a and Subbarao Krishna Prasad^a

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* Corresponding authors

^a Centre for Liquid Crystal Research, Jalahalli, Bangalore 560013, India
E-mail: Yelamaggad@yahoo.com
Fax: 91-80-28382044
Tel: 91-80-28381119

Abstract

The first nonsymmetric liquid crystal dimers, possessing salicylaldimine and cyanobiphenyl rodlike anisometric segments, exhibiting the biaxial smectic A (McMillan) phase unequivocally evidenced by microscopic, conoscopic, calorimetric and X-ray diffraction studies is reported.

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Supplementary files

Synthetic procedures, structural and physical characterization data. PDF (356K)

Article information

DOI: https://doi.org/10.1039/B612132B
Article type: Communication
Submitted: 23 Aug 2006
Accepted: 18 Sep 2006
First published: 29 Sep 2006

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J. Mater. Chem., 2006,16, 4099-4102

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The biaxial smectic (SmA_b) phase in nonsymmetric liquid crystal dimers comprising two rodlike anisometric segments: an unusual behavior

C. V. Yelamaggad, I. S. Shashikala, D. S. Shankar Rao, G. G. Nair and S. Krishna Prasad, J. Mater. Chem., 2006, 16, 4099 DOI: 10.1039/B612132B

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Journal of Materials Chemistry