Mesogenic properties of single ring compounds: dipentyl derivatives of p-carboranes and bicyclo[2.2.2]octane
- 1 January 1999
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 9 (3) , 683-686
- https://doi.org/10.1039/a807596d
Abstract
The dipentyl derivatives of 10- and 12-vertex p-carboranes and bicyclo[2.2.2]octane have been prepared and studied in the pure state and in binary mixtures with a nematic host. Only 1,4-dipentylbicyclo[2.2.2]octane was found to exhibit a monotropic nematic transition. The extrapolated virtual nematic-isotropic transition temperatures provide the expected order of ring effectiveness in supporting the nematic mesophase: bicyclo[2.2.2]octane>12-vertex p-carborane >10-vertex p-carborane. The results for the single ring derivatives [1]b were compared with clearing temperatures for the two-ring mesogens [2]c.Keywords
This publication has 0 references indexed in Scilit: