Kloess, P and McComb, J and Coles, HJ and Zentel, R (1996) Synthesis and properties of a new series of low-molar-mass organo-siloxane derivatives. Ferroelectrics, 180. pp. 233-243. ISSN 0015-0193Full text not available from this repository.
Two series of ferroelectric liquid crystalline organo-siloxanes containing a laterally attached halogen on the phenyl ring have been synthesised and characterised to determine the impact of the siloxane group and the halogen on the mesomorphism and electro-optic switching properties. Both monomesogenic and bimesogenic compounds have been studied. The monomesogenic derivatives were found to be ferroelectric with high tilt and Ps. The tilt angle of 45° and the Ps of 95nC/cm2 are almost temperature independent. The bimesogenic bromo substituted derivatives showed mainly ferroelectric phases about 60°C wide. Maximum values for the spontaneous polarisation and the tilt angle were only slightly influenced by the length of the siloxane spacer. Altering the halogen to a fluorine shifted the liquid cystalline phase slightly to higher temperatures whilst maintaining the mesophase range of 60°C.
|Divisions:||Div B > Photonics|
|Depositing User:||Cron job|
|Date Deposited:||16 Jul 2015 13:37|
|Last Modified:||25 Nov 2015 10:51|