Phys. Rev. E 72, 021702 (2005) - Effect of flexible bimesogen dopant on the stability of the anticlinic liquid-crystal phase

Effect of flexible bimesogen dopant on the stability of the anticlinic liquid-crystal phase

Min Hua Zhu, Rolfe G. Petschek, Charles Rosenblatt, Lachezar Komitov, Nils Olsson, Bertil Helgee, Julie M. Kim, and Mary E. Neubert

Phys. Rev. E 72, 021702 – Published 8 August 2005

Abstract

Small quantities of the floppy bimesogen di(4PPB5)3Si were dissolved in an anticlinic liquid crystal consisting of a mixture of left-handed and right-handed TFMHPOBC, with enantiomer excess $X = 0.2$ . The bimesogen dopant was found to promote anticlinic order with an anticlinic interaction coefficient per molecule $u_{dopant}$ smaller than, but of the same order as, that of the rigid bent-core dopant P-7PIMB. For both dopants $u_{dopant}$ was found to be much larger than that due to a pair of TFMHPOBC molecules in adjacent layers. The results are examined in terms of both the flexibility of the group linking the two legs of each dopant, as well as their chemical structure.

Received 8 April 2005

DOI:https://doi.org/10.1103/PhysRevE.72.021702

©2005 American Physical Society

Authors & Affiliations

Min Hua Zhu, Rolfe G. Petschek, and Charles Rosenblatt^*

Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106, USA

Lachezar Komitov

Liquid Crystal Group, Department of Physics, Gothenburg University, SE-412 96 Göteborg, Sweden

Nils Olsson and Bertil Helgee

Department of Materials and Surface Chemistry, Chalmers University of Technology, S-412 96 Göteborg, Sweden

Julie M. Kim and Mary E. Neubert

Liquid Crystal Institute, Kent State University, Kent, Ohio 44242, USA

^*Author to whom correspondence should be addressed. Email address: rosenblatt@case.edu

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Issue

Vol. 72, Iss. 2 — August 2005

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