Estimation of thermodynamic and Beyer's parameter (B/A) in liquid crystalline 5.m, 5O.m, 5.Om, 5O.Om compounds with m=5 and 16

The thermodynamic parameters such as Sharma parameter (S sub(o), Huggins parameter (F), reduced volume ([inline image][inline image]), reduced compressibility ([inline image][inline image]), etc. are studied using the volume expansion coefficient ( alpha ), which is estimated from density for N-(p-n...

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Veröffentlicht in:Physica. B, Condensed matter Condensed matter, 2011-10, Vol.406 (20), p.3821-3824
Hauptverfasser: MADHAVI LATHA, D, PISIPATI, V. G. K. M, RAMAKRISHNA NANCHARA RAO, M, DATTA PRASAD, P. V
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container_issue 20
container_start_page 3821
container_title Physica. B, Condensed matter
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creator MADHAVI LATHA, D
PISIPATI, V. G. K. M
RAMAKRISHNA NANCHARA RAO, M
DATTA PRASAD, P. V
description The thermodynamic parameters such as Sharma parameter (S sub(o), Huggins parameter (F), reduced volume ([inline image][inline image]), reduced compressibility ([inline image][inline image]), etc. are studied using the volume expansion coefficient ( alpha ), which is estimated from density for N-(p-n-pentyl benzylidene)-p-n-pentyl aniline (5.5), N-(p-n-pentyloxy benzylidene)-p-n-pentyl aniline (5O.5), N-(p-n-pentyl benzylidene)-p-n-pentyloxy aniline (5.O5), N-(p-n-pentyloxy benzylidene)-p-n-pentyloxy aniline (5O.O5), N-(p-n-pentyl benzylidene)-p-n-hexadecyl aniline (5.16), N-(p-n-pentyloxy benzylidene)-p-n-hexadecyl aniline (5O.16), N-(p-n-pentyl benzylidene)-p-n-hexadecyloxy aniline (5.O16) and N-(p-n-pentyloxy benzylidene)-p-n-hexadecyloxy aniline (5O.O16) compounds in isotropic and liquid crystalline phases. The parameters like intermolecular free length (L) sub(f)), molecular radius (m sub(r) and Beyer's non-linearity parameter (B/A) are also computed from density data for the above compounds. The results are discussed in the light of these parameters variation with temperature in a particular phase in a liquid crystal molecule and with the position of oxygen atom. The thermodynamic parameter S) sub(o) exhibits a constant characteristic value 1.11+/-0.01 in all the compounds like other reported liquid crystalline compounds, liquids and polymers. The variation of other thermodynamic parameters in LC phases of these compounds with temperature is discussed in the light of the body of the data available.
doi_str_mv 10.1016/j.physb.2011.06.079
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B, Condensed matter</title><description>The thermodynamic parameters such as Sharma parameter (S sub(o), Huggins parameter (F), reduced volume ([inline image][inline image]), reduced compressibility ([inline image][inline image]), etc. are studied using the volume expansion coefficient ( alpha ), which is estimated from density for N-(p-n-pentyl benzylidene)-p-n-pentyl aniline (5.5), N-(p-n-pentyloxy benzylidene)-p-n-pentyl aniline (5O.5), N-(p-n-pentyl benzylidene)-p-n-pentyloxy aniline (5.O5), N-(p-n-pentyloxy benzylidene)-p-n-pentyloxy aniline (5O.O5), N-(p-n-pentyl benzylidene)-p-n-hexadecyl aniline (5.16), N-(p-n-pentyloxy benzylidene)-p-n-hexadecyl aniline (5O.16), N-(p-n-pentyl benzylidene)-p-n-hexadecyloxy aniline (5.O16) and N-(p-n-pentyloxy benzylidene)-p-n-hexadecyloxy aniline (5O.O16) compounds in isotropic and liquid crystalline phases. 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B, Condensed matter</jtitle><date>2011-10-15</date><risdate>2011</risdate><volume>406</volume><issue>20</issue><spage>3821</spage><epage>3824</epage><pages>3821-3824</pages><issn>0921-4526</issn><eissn>1873-2135</eissn><abstract>The thermodynamic parameters such as Sharma parameter (S sub(o), Huggins parameter (F), reduced volume ([inline image][inline image]), reduced compressibility ([inline image][inline image]), etc. are studied using the volume expansion coefficient ( alpha ), which is estimated from density for N-(p-n-pentyl benzylidene)-p-n-pentyl aniline (5.5), N-(p-n-pentyloxy benzylidene)-p-n-pentyl aniline (5O.5), N-(p-n-pentyl benzylidene)-p-n-pentyloxy aniline (5.O5), N-(p-n-pentyloxy benzylidene)-p-n-pentyloxy aniline (5O.O5), N-(p-n-pentyl benzylidene)-p-n-hexadecyl aniline (5.16), N-(p-n-pentyloxy benzylidene)-p-n-hexadecyl aniline (5O.16), N-(p-n-pentyl benzylidene)-p-n-hexadecyloxy aniline (5.O16) and N-(p-n-pentyloxy benzylidene)-p-n-hexadecyloxy aniline (5O.O16) compounds in isotropic and liquid crystalline phases. The parameters like intermolecular free length (L) sub(f)), molecular radius (m sub(r) and Beyer's non-linearity parameter (B/A) are also computed from density data for the above compounds. The results are discussed in the light of these parameters variation with temperature in a particular phase in a liquid crystal molecule and with the position of oxygen atom. The thermodynamic parameter S) sub(o) exhibits a constant characteristic value 1.11+/-0.01 in all the compounds like other reported liquid crystalline compounds, liquids and polymers. The variation of other thermodynamic parameters in LC phases of these compounds with temperature is discussed in the light of the body of the data available.</abstract><cop>Kidlington</cop><pub>Elsevier</pub><doi>10.1016/j.physb.2011.06.079</doi><tpages>4</tpages></addata></record>
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subjects Aniline
Condensed matter
Condensed matter: structure, mechanical and thermal properties
Density
Exact sciences and technology
Lattice dynamics
Liquid crystals
Liquids
Phases
Physics
Thermal properties of condensed matter
Thermal properties of liquids: heat capacity, thermal expansion
Thermodynamics
Vibrational states in disordered systems
title Estimation of thermodynamic and Beyer's parameter (B/A) in liquid crystalline 5.m, 5O.m, 5.Om, 5O.Om compounds with m=5 and 16
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