Investigation of thermodynamic and surface characterisation of 4-[4-(2-ethylhexyloxy)benzoyloxy]benzoic acid thermotropic liquid crystal by inverse gas chromatography

Çakar, Fatih; Ocak, Hale; Öztürk, Emine; Mutlu-Yanic, Serap; Kaya, Dila; San, Nevim; Cankurtaran, Özlem; Bilgin‐Eran, Belkız; Karaman, Ferdane

doi:10.1080/02678292.2014.919672

Cited by 20 publications

(8 citation statements)

References 30 publications

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“…According to the theories of Flory–Huggins and the equation of state, interaction parameters can be defined [ 63 – 65 ]: where and are the specific volumes of the liquid crystal, and the specific hard-core volume of the liquid crystal, respectively; and are the molar volumes of the solvent at temperature T , and the molar hard-core volume of the solvent; is the saturated vapour pressure; is the second virial coefficient for the gaseous state; is the specific retention volume.…”

Section: Chromatographic Investigations Of Different Properties Of LImentioning

confidence: 99%

“…The effective exchange energy parameter, , in the equation of solid-state theory is expressed as [ 63 – 65 ]: where , , and are the molar volumes of the liquid at the testing temperature T , the characteristic molar volume, ( and are the reduced volumes of the solvent and liquid crystal, respectively); is the reduced temperature of the solvent; is the characteristic pressure.…”

Section: Chromatographic Investigations Of Different Properties Of LImentioning

confidence: 99%

“…The values of the aforesaid parameters were analysed regarding the influence of the chemical structure of the LCs molecules [ 63 – 65 ].…”

Section: Chromatographic Investigations Of Different Properties Of LImentioning

confidence: 99%

“…Ocak and his coworkers tested chromatographically the acceptor–donor properties of 4-[4-(2-ethylhexyloxy)benzoyloxy]benzoic acid (EBBA), 4-bromo-1,3-phenylene-bis[4-[4′-(10-undecyloxy)-benzyloxy]]benzoate (BPUBB), (S)-4(undec-10-enyloxy)-2-hydroxybenzylidene-4-(2-methylbutoxy)aniline (UMBPIMP), (S)-4-(dodecyloxy)-2-hydroxybenzylidene-4-(2-methylbutoxy)aniline (SALC)—Schiff-base, and (S)-4-(5,5,6,6,7,7,8,8,9,9,10,10,10-tridecafluorodecyloxy-2-hydroxybenzylidene-4-(2-methylbutoxy)aniline (SFSALC) [ 65 , 73 – 75 ].…”

Section: Chromatographic Investigations Of Different Properties Of LImentioning

confidence: 99%

“…The values of the dispersive component of the surface free energy, , the specific free energy of adsorption, , the enthalpy and entropy of adsorption, , , of neutral, acidic, basic, and amphoteric probes on the LC studied at 308.2 and 333.2 K, viz., at its solid [ 65 ]. The values were correlated with the acceptor and the donor numbers of the probes employed to quantify the acidic and the basic parameters of the LC surface.…”

Section: Chromatographic Investigations Of Different Properties Of LImentioning

confidence: 99%

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Liquid Crystals as Stationary Phases in Chromatography

et al. 2016

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The most correct analysis of the compositions of diverse analytes mixtures is significant for analytical studies in different fields; however, many prevalent analytes cannot be identified employing traditional partition gas chromatographic methods. Thus, the increasing requirements on analytes of isomeric compounds and the problems encountered in their separation demand a study of more diverse analytical systems which are characterised by higher selectivity. Therefore, the selectivity and polarities of various liquid crystals (rod-like, banana-shape, biforked, oxygen, sulphur, nitrogen, and metal containing molecules, Schiff-base, and polymeric dendrimers) employed as liquid crystalline stationary phases (LCSPs) have been discussed from both points of views, namely, their analytical applications and thermodynamic characteristics of infinitely diluted probes with different acceptor–donor properties. Extreme particular effort has been paid to the different interdependencies between the bound up chemical structures of liquid crystal molecules with their different acceptor–donor properties and the connected resolution capabilities in the interpretation of the probe—LCSP systems, on the basis of the and dependencies, with regard to the LCSP compositions, which have been controlled by the counterbalancing of the enthalpy and entropy factors. The properties of binary systems composed of liquid crystalline poly(propyleneimine) dendrimers—rod-like molecules of liquid crystals and effects of the dendrimer structure, the chemical nature, and molecular size of the non-mesogens on the ability to dissolve in the liquid crystalline phases, have been interpreted. Practical applications of metallomesogenes and chiral stationary phases for analytical separation of different organic substances have also been taken into consideration.

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Section: Chromatographic Investigations Of Different Properties Of LImentioning

confidence: 99%

Section: Chromatographic Investigations Of Different Properties Of LImentioning

confidence: 99%

“…The values of the aforesaid parameters were analysed regarding the influence of the chemical structure of the LCs molecules [ 63 – 65 ].…”

Section: Chromatographic Investigations Of Different Properties Of LImentioning

confidence: 99%

Section: Chromatographic Investigations Of Different Properties Of LImentioning

confidence: 99%

Section: Chromatographic Investigations Of Different Properties Of LImentioning

confidence: 99%

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Liquid Crystals as Stationary Phases in Chromatography

et al. 2016

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Adsorptive removal of congo red and methylene blue dyes from aqueous solutions by Rumex obtusifolius roots

Isik

2023

Korean J. Chem. Eng.

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Chromatographic determination of the free energy of adsorption and absorption characteristic of 4-(trans-4′-n-alkylcyclohexyl) benzoates

Purchała

Grajek

Witkiewicz

et al. 2020

Journal of Chromatography A

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Investigation of thermodynamic and surface characterisation of 4-[4-(2-ethylhexyloxy)benzoyloxy]benzoic acid thermotropic liquid crystal by inverse gas chromatography

Cited by 20 publications

References 30 publications

Liquid Crystals as Stationary Phases in Chromatography

Liquid Crystals as Stationary Phases in Chromatography

Adsorptive removal of congo red and methylene blue dyes from aqueous solutions by Rumex obtusifolius roots

Chromatographic determination of the free energy of adsorption and absorption characteristic of 4-(trans-4′-n-alkylcyclohexyl) benzoates

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