Title:	Pressure studies on two discotic liquid crystals.
Authors:	Raja, V.N. Shashidhar, R. Chandrasekhar, S. Boehm, R.E. Martire, D.E.
Keywords:	Discotic Liquid crystals Columnar mesophase Pressure studies Phase diagrams
Issue Date:	Jul-1985
Publisher:	Indian Academy of Sciences, Bangalore, India.
Citation:	Pramana, 1985, Vol. 25, pL119-L-122.
Abstract:	Pressure-temperature diagrams have becn studied for two discotic compounds, hexa-n-octyloxy triphenylene and hexa-n-decanoyloxytriphenylenc, both of which exhibit the columnar (D) phase at atmospheric pressure. Two interesting results, common to both compbunds, have been obtained: (a) in contrast to what is usually observed in liquid crystals of rod-like molecules, the columnar-isotropic (D-I) transition, which is enantiotropic at atmospheric pressure, becomes monotropic at high pressures; (b) dT/dP = 0 for the D-I transition, implying that despite the drastic change in the molecular order at this transition, the associated volume change is extremely small.
URI:	http://hdl.handle.net/2289/1079
ISSN:	0304-4289
Copyright:	Indian Academy of Sciences, Bangalore, India.
Appears in Collections:	Research Papers (SCM)

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