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2. Crystal structures and dielectric properties of 4,4′-dimethyl-6,6′-dichlorothioindigo (Pigment Red 181)

Author

Sakthidharan, C. P., primary, Niewa, R., additional, Zherebtsov, D. A., additional, Podgornov, F. V., additional, Matveychuk, Y. V., additional, Bartashevich, E. V., additional, Nayfert, S. A., additional, Adonin, S. A., additional, Gavrilyak, M. V., additional, Boronin, V. A., additional, Polozov, M. A., additional, Karthikeyan, S., additional, Sarojadevi, M., additional, Rajakumar, K., additional, and Prabunathan, P., additional

Published
2020
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4. Crystal structures and dielectric properties of 4,4′‐dimethyl‐6,6′‐dichlorothioindigo (Pigment Red 181).

Author

Sakthidharan, C. P., Niewa, R., Zherebtsov, D. A., Podgornov, F. V., Matveychuk, Y. V., Bartashevich, E. V., Nayfert, S. A., Adonin, S. A., Gavrilyak, M. V., Boronin, V. A., Polozov, M. A., Karthikeyan, S., Sarojadevi, M., Rajakumar, K., and Prabunathan, P.

Subjects
DIELECTRIC properties, CRYSTAL structure, ELECTRIC conductivity, RED, PIGMENTS, POLYMORPHISM (Crystallography)
Abstract

The structures of the red polymorph (space group P1) and the black polymorph (space group P21/c) of 4,4′‐dimethyl‐6,6′‐dichlorothioindigo were solved from single‐crystal samples. For both polymorphs, the spatial stacking of the flat molecules is driven by π‐stacking and noncovalent interactions within the layers. Spectroscopic (UV–vis, IR and photoluminescence) and thermal properties of the red polymorph were investigated experimentally. The bandgap of this polymorph was estimated as 2.08 eV at room temperature. It is demonstrated that the electric conductivity of the red polymorph follows the hopping mechanism. [ABSTRACT FROM AUTHOR]

Published
2021
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