Tetracene Crystals: Growth from Solutions, Solubility, and Thermal Properties

Kulishov, A.A.; Yurasik, G.A.; Grebenev, V.V.; Postnikov, V.A.

Авторы: Kulishov A.A., Yurasik G.A., Grebenev V.V., Postnikov V.A.
Журнал: Crystallography Reports
Том: 67
Номер: 6
Год издания: 2022
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 1001
Последняя страница: 1012
DOI: 10.1134/s1063774522060153
Аннотация: The solubility of tetracene crystals has been investigated experimentally and theoretically within the approximation of regular-solution model. The grown crystals had a shape of thin elongated plates. The largest tetracene crystal (8 mm × 50 μm in size) was grown from a benzene solution by precipitant vapor diffusion into solution. The X-ray diffraction pattern from a developed crystal face is the result of the X-ray beam reflection from the (001) plane of a set of monolayers with a thickness d001 = 1.21 nm. An analysis of the surface morphology of the (001) face of tetracene crystal by atomic force microscopy (AFM) revealed the presence of elementary growth steps, whose height coincides (within the measurement error) with the monolayer thickness d001. The parameters of melting (Tm = 343.0°C, ΔHm = 35.6 kJ/mol) and polymorphic transition (Ttr =310.0°C, ΔHtr = 0.9 kJ/mol) of tetracene were refined using differential scanning calorimetry (DSC). A comparison of the optical absorption and luminescence spectra of solutions of a pure tetracene sample and a processed (previously molten in a hermetic crucible in an inert atmosphere) sample in toluene confirms degradation of the material subjected to overheating above the melting temperature.
Добавил в систему: Постников Валерий Анатольевич

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Tetracene Crystals: Growth from Solutions, Solubility, and Thermal Propertiesстатья