Thermodynamic Parameters of Cholesteric/Smectic A Transition in Cholesteric Myristate and Its Binary Mixture CM/PCPB

Date

2018-06-01

Author

Yurtseven, Hasan Hamit

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

177
views

0
downloads

Thermodynamic properties of the cholesteryl myristate (CM) and its binary mixture CM/PCPB (p-pentylphenyl-2-chloro-4(p-pentylbenzoyl)-benzoate) are studied at the concentrations of x (PCPB) = 0.052 and 0.219 as a function of temperature near the cholosteric/smectic A transition. By analyzing the observed molar volume from the literature, the temperature dependences of the thermal expansion, isothermal compressibility and the difference in the specific heat are calculated and, the Pippard relations are established for those compounds close to the cholesteric/smectic A transition. Predictions of the thermodynamic quantities and the Pippard relations can be examined by the experimental measurements of the CM and its binary mixture of CM/PCPB close to the cholesteric/smectic A transition.

Subject Keywords

Physical and Theoretical Chemistry

URI

https://hdl.handle.net/11511/39327

Journal

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A

DOI

https://doi.org/10.1134/s0036024418060250

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

TOPOTACTIC ORGANOMETALLIC CHEMISTRY - INTRAZEOLITE CPCO(CO)2-M56Y, WHERE M=H, LI, NA, K, RB, AND CS LI, XP; OZIN, GA; Özkar, Saim (American Chemical Society (ACS), 1991-05-01) The vibrational and electronic spectroscopy of precursor CpCo(CO)2-M56Y, where M = H, Li, Na, K, Rb, and Cs and Y refers to zeolite Y, is compared with that known for CpCo(CO)2 in the gas, solution, and matrix phases. In this way considerable insight is obtained concerning the subtle interplay of supercage topology, framework oxygen charge density, and extraframework cation local field effects on the geometric and electronic properties, as well as the type(s) of anchoring site(s) (cation versus oxygen fram...
RAMAN-STUDY NH4C1 NEAR THE TRICRITICAL POINT Yurtseven, Hasan Hamit (1982-01-01) The Raman spectrum of NH4Cl has been studied as a function of temperature and pressure close to the multicritical point at which the λ-transition changes from first to second order. Variations in the intensities of appropriate bands have been used to calculate the critical exponents for the order parameter. By varying the temperature at fixed pressures of zero, 3.0 k bar and 1.5 k bar, exponent values of β = 0.154 ± 0.012, β = 0.33 ± 0.06 and β = 0.26 ± 0.06 have been obtained for the first-order, second-or...
Excitation Localization/Delocalization Isomerism in a Strongly Coupled Covalent Dimer of 1,3-Diphenylisobenzofuran Schrauben, Joel N.; Akdağ, Akın; Wen, Jin; Havlas, Zdenek; Ryerson, Joseph L.; Smith, Millie B.; Michl, Josef; Johnson, Justin C. (American Chemical Society (ACS), 2016-05-26) Two isomers of both the lowest excited singlet (S-1) and triplet (T-1) states of the directly para, para'-connected covalent dimer of the singlet-fission chromophore 1,3-diphenylisobenzofuran have been observed. In one isomer, excitation is delocalized over both halves of the dimer, and in the other, it is localized on one or the other half. For a covalent dimer in solution, such "excitation isomerism" is extremely rare. The vibrationally relaxed isomers do not interconvert, and their photophysical properti...
ELECTRONIC ABSORPTION AND MAGNETIC CIRCULAR-DICHROISM SPECTRA FOR BINUCLEAR PT2(SO4)4X2N- AND PT2(HPO4)4X2N- IONS IN AQUEOUS-SOLUTION GOKAGAC, G; ISCI, H; MASON, WR (American Chemical Society (ACS), 1992-05-27) Electronic absorption and 7-T magnetic circular dichroism (MCD) spectra in the UV-visible region are reported for the binuclear diplatinum(III) ions: Pt2(SO4)4X2n-, n = 2, X = H2O, NH3; n = 4, X = Cl-, Br-, OH-. Pt2(HPO4)4X2n-, n = 2, X = H2O, Me2S; n = 4, X = Cl-, Br-. Both the absorption spectra and the MCD spectra for complexes with the same axial ligand X are similar for oxo-bridging SO42- or HPO42-. However, the MCD spectra show marked differences depending upon the nature of the X ligand. The mos...
Dielectric Properties of Ethanol and Gasoline Mixtures by Terahertz Spectroscopy and an Effective Method for Determination of Ethanol Content of Gasoline ARIK, Enis; Altan, Hakan; Esentürk, Okan (American Chemical Society (ACS), 2014-05-01) Investigation of frequency dependent permittivity of mixture solutions provides information on the role of intermolecular interactions on relaxation processes of solvent and solute molecules. In this study the dielectric properties of ethanol/gasoline mixtures in the terahertz spectral region are investigated. Frequency dependent absorption coefficients, refractive indices, and complex permittivities of pure ethanol and gasoline, and their mixtures at varying ethanol volume percentages (v/v %) are reported....

Citation Formats

H. H. Yurtseven, “Thermodynamic Parameters of Cholesteric/Smectic A Transition in Cholesteric Myristate and Its Binary Mixture CM/PCPB,” RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A, pp. 1208–1212, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39327.