Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Phase transition thermodynamics of 1,3,5-tris-(α-naphthyl)benzene: theory and experiment

Version 1 : Received: 2 April 2024 / Approved: 2 April 2024 / Online: 3 April 2024 (11:14:16 CEST)

How to cite: Yagofarov, M.I.; Bolmatenkov, D.N.; Notfullin, A.A.; Sokolov, A.A.; Balakhontsev, I.S.; Mukhametzyanov, T.A.; Solomonov, B.N. Phase transition thermodynamics of 1,3,5-tris-(α-naphthyl)benzene: theory and experiment. Preprints 2024, 2024040240. https://doi.org/10.20944/preprints202404.0240.v1 Yagofarov, M.I.; Bolmatenkov, D.N.; Notfullin, A.A.; Sokolov, A.A.; Balakhontsev, I.S.; Mukhametzyanov, T.A.; Solomonov, B.N. Phase transition thermodynamics of 1,3,5-tris-(α-naphthyl)benzene: theory and experiment. Preprints 2024, 2024040240. https://doi.org/10.20944/preprints202404.0240.v1

Abstract

1,3,5-Tris-(α-naphthyl)benzene is an organic non-electrolyte with notable stability of an amorphous phase. Its glassy and supercooled liquid states were previously studied by spectroscopic and calorimetric methods. However, the thermodynamic parameters of phase transitions available from the literature are inconsistent. In this work, the heat capacities of crystalline and liquid phases, the temperature dependence of the saturated vapor pressures, fusion and vaporization enthalpies were determined using differential and fast scanning calorimetry and verified using the estimates based on solution calorimetry. The structural features of 1,3,5-tris-(α-naphthyl)benzene are discussed based on the computations performed and the data on the molecular refractivity. The consistency between the values obtained by independent techniques was demonstrated. The deviations in the previously published data were attributed to possible polymorphism.

Keywords

vapor pressure; vaporization enthalpy; fusion enthalpy; solution calorimetry; heat capacity; polyaromatic hydrocarbons; fast scanning calorimetry; differential scanning calorimetry

Subject

Chemistry and Materials Science, Physical Chemistry

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