Thermodynamic, optical and dielectric studies of the homologous members of columnar discotic compound Rufigallol hexa-n-alkoxylates

Dhar, R.; Kumar, Sandeep; Gupta, Meenal; Agrawal, V.K.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3881

Full metadata record

DC Field	Value	Language
dc.contributor.author	Dhar, R.	-
dc.contributor.author	Kumar, Sandeep	-
dc.contributor.author	Gupta, Meenal	-
dc.contributor.author	Agrawal, V.K.	-
dc.date.accessioned	2009-10-08T10:19:02Z	-
dc.date.available	2009-10-08T10:19:02Z	-
dc.date.issued	2008-05	-
dc.identifier.citation	Journal of Molecular Liquids, 2008, Vol.141, p19	en
dc.identifier.issn	0167-7322	-
dc.identifier.uri	http://hdl.handle.net/2289/3881	-
dc.description	Restricted Access.	en
dc.description.abstract	Thermodynamic, optical texture and frequency dependent dielectric studies of re-synthesized discotic compounds Rufigallol hexa-n-alkoxylates (for n = 6, 7, 8, 9) having wide temperature range hexagonal columnar (colh) mesophase have been carried out. The mesophase and their transition temperatures have been determined by using polarizing microscope and differential scanning calorimetry. Dielectric permittivity parallel (ε\|\|′) and perpendicular (εperpendicular′) to column axis have been determined. Using these two sets of data, dielectric anisotropy (Δε′ = ε\|\|′ − εperpendicular′) has been obtained which has been found to be positive throughout the entire range of the colh mesophase for all of the four compounds of this series. No relaxation phenomenon has been observed in the frequency range of measurement i.e. 10 Hz to 10 MHz. The DC conductivity of these compounds has been found to be rather low (~ 10− 10 to 10− 11 S m− 1). All the dielectric parameters show odd-even effect with the variation of n.	en
dc.language.iso	en	en
dc.publisher	Elsevier B.V.	en
dc.relation.uri	http://dx.doi.org/10.1016/j.molliq.2008.02.010	en
dc.rights	2008 Elsevier B.V.	en
dc.subject	Hexagonal columnar phase	en
dc.subject	Dielectric permittivity and loss	en
dc.subject	Anisotropy	en
dc.subject	Conductivity	en
dc.title	Thermodynamic, optical and dielectric studies of the homologous members of columnar discotic compound Rufigallol hexa-n-alkoxylates	en
dc.type	Article	en
Appears in Collections:	Research Papers (SCM)

Files in This Item:

File	Description	Size	Format
2008 JML V141 p19.pdf Restricted Access		486.52 kB	Adobe PDF	View/Open Request a copy

Show simple item record