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Liquid Crystals Volume 31, 2004 - Issue 2
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Original Articles

The effect of replacing a benzene ring with a saturated six-membered ring on the mesomorphic properties of 4,4′-disubstituted diphenyldiacetylenes

Mary E. Neubert Corresponding author Glenn H. Brown Liquid Crystal Institute, Kent State University, Kent, Ohio 44242-2001, USA
,
Sandra S. Keast Glenn H. Brown Liquid Crystal Institute, Kent State University, Kent, Ohio 44242-2001, USA
,
Julie M. Kim Glenn H. Brown Liquid Crystal Institute, Kent State University, Kent, Ohio 44242-2001, USA
,
Kyle J. Miller Glenn H. Brown Liquid Crystal Institute, Kent State University, Kent, Ohio 44242-2001, USA
,
Rachel M. Murray Glenn H. Brown Liquid Crystal Institute, Kent State University, Kent, Ohio 44242-2001, USA
,
Aaron G. Norton Glenn H. Brown Liquid Crystal Institute, Kent State University, Kent, Ohio 44242-2001, USA
,
Raj A. Shenoy Glenn H. Brown Liquid Crystal Institute, Kent State University, Kent, Ohio 44242-2001, USA
,
Margaret E. Walsh Glenn H. Brown Liquid Crystal Institute, Kent State University, Kent, Ohio 44242-2001, USA
&
Rolfe G. Petschek Physics Department, Case Western Reserve University, Cleveland, Ohio 44106-7079, USA
 show all
Pages 175-184 | Received 24 Jul 2003, Accepted 20 Aug 2003, Published online: 19 May 2010
 
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Abstract

A limited selection of ring modified diphenyldiacetylenes of the type where A=, Y=C n H2n+1, CF3, F, COMe, NH2, and NMe2, and A=, trans and cis with Y=F and trans with Y=C3H7, were synthesized. Mesomorphic properties were determined by hot stage polarizing microscopy and DSC. These properties were generally poorer than those found in the parent benzene compounds. This was also true of some pyrimidine analogues reported earlier. Birefringence values also decreased as expected.

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