Calorimetric study of the cubic mesogen, ACBC(16)

Sorai, Michio; Saito, Kazuya; Nakamoto, Taishi; Ikeda, Mayumi; Galyametdinov, Yuri G.; Galyametdinova, I. V.; Eidenschink, Rudolf; Haase, Wolfgang

doi:10.1080/0267829031000121206

Cited by 8 publications

(2 citation statements)

References 32 publications

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“…That is, the dynamical disorder above T g is frozen-in below T g . Plastic crystals, , liquid crystals, , and some crystals with structural disorder − show glass transitions. It is still an open problem to what extent the universal properties observed in LQG's are common to these glasses in this broader sense …”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Study on a Chiral Glass Former, 4-(1-Methylheptyloxy)-4‘-cyanobiphenyl

et al. 2004

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The heat capacities were measured by adiabatic calorimetry down to 6 K on both the right-handed isomer and a racemic mixture of 4-(1-methylheptyloxy)-4‘-cyanobiphenyl. A thermodynamic relationship between two crystalline phases has been established and inversion between the stable and the metastable crystals has been found for the isomer. The contradiction between a previous calorimetric study and the results of inelastic neutron scattering and infrared spectroscopy has been resolved. No crystallization was detected for the racemic mixture. The behavior around the glass transition has been analyzed.

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Section: Introductionmentioning

confidence: 99%

Thermodynamic Study on a Chiral Glass Former, 4-(1-Methylheptyloxy)-4‘-cyanobiphenyl

et al. 2004

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“…As for the phase transition between two cubic phases, the difference in heat capacity is also negative. In other compounds in the ANBC series, the heat capacity of a cubic phase, irrespective of the symmetry, is smaller than that of the SmC phase located on the low-temperature side [22,23,25]. In lyotropic liquid crystals formed in binary systems between a non-ionic surfactant and water [26,27], the cubic phase shows smaller heat capacity than the neighboring liquid-crystalline phases.…”

Section: Multicontinuous Structuresmentioning

confidence: 99%

Microphase-separated multicontinuous phase in low-molecular-mass thermotropic liquid crystals

Saito

2009

Pure and Applied Chemistry

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Extensive application of chemical thermodynamics to exotic aggregation formed in thermotropic liquid crystals is briefly described. Through thermodynamic analyses and considerations of experimental results on liquid crystals, the unexpected sharing of common properties by thermo-and lyotropic liquid crystals is demonstrated. In some thermo tropic liquid crystals, the terminal alkyl chain attached to the molecular core is highly disordered, as indicated by the magnitude of configurational entropy. The molten chain serves as intramolecular solvent (self-solvent), as evidenced by the close similarity between phase diagrams against chain length and composition in the binary system with n-alkane. These facts lead to the quasi-binary picture of thermotropic liquid crystals. Consideration of the thermodynamic potential expanded in terms of density fluctuation gives a new insight into the multicontinuous phases formed in simple systems consisting of anisotropic, rodlike particles.

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Thermodynamic symptom of coexistence of two aggregation modes in the Im3m cubic phase formed in thermotropic mesogen, ANBC(n)

Saito¹,

Nakamoto²,

Sorai³

et al. 2009

Chemical Physics Letters

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Calorimetric study of the cubic mesogen, ACBC(16)

Cited by 8 publications

References 32 publications

Thermodynamic Study on a Chiral Glass Former, 4-(1-Methylheptyloxy)-4‘-cyanobiphenyl

Thermodynamic Study on a Chiral Glass Former, 4-(1-Methylheptyloxy)-4‘-cyanobiphenyl

Microphase-separated multicontinuous phase in low-molecular-mass thermotropic liquid crystals

Thermodynamic symptom of coexistence of two aggregation modes in the Im3m cubic phase formed in thermotropic mesogen, ANBC(n)

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