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Phase transformations of iodine-containing dual-layered conductor θ-(ET)4CdI4(PhCl) upon coolingстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или ScopusДата последнего поиска статьи во внешних источниках: 1 июня 2022 г.
- Авторы: Shilov Gennadii V., Zhilyaeva Elena I., Flakina Alexandra M., Aldoshin Sergey M., Konarev Dmitri V., Lyubovskii Rustem B., Lyubovskaya Rimma N.
- Журнал: CrystEngComm
- Том: 22
- Номер: 46
- Год издания: 2020
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 8054
- Последняя страница: 8062
- DOI: 10.1039/d0ce01375g
- Аннотация: A layered organic conductor θ-(ET)4CdI4(PhCl) has been synthesized and characterized (ET isbis(ethylenedithio)tetrathiafulvalene). It belongs to the family of dual-layered conductorsθ-(ET)4MBr4(C6H6−nXn) and for the first time includes the iodine-containing anion [CdI4]2−. It exhibits metallic conductivity within the plane of organic ET molecules down to 206 K, and semiconductor properties in the perpendicular direction. The temperature dependence of in-plane resistivity for the compound shows changes in the conductive properties at 199 K and below 164 K. Structural phase transitions have been revealed at these temperatures. Crystal structures determined at 220, 185, and 100 K are attributed to tetragonal, monoclinic, and triclinic crystal systems, respectively. As a result of thestructural phase transition at 199 K, equivalent ET layers become nonequivalent, the dihedral anglesbetween ET molecules of neighboring stacks change, and ordering of terminal ethylene groups of ETmolecules occurs in a half of radical cation layers. At 100 K, the difference between neighboring radical cation layers increases as compared with the monoclinic phase and the ordering of terminal ethylene groups in all ET molecules has been found. The solvent molecule PhCl remains disordered in all these structures.
- Добавил в систему: Жиляева Елена Ивановна