Phase transitions and transport properties in tetra-n-butylammonium iodide | Sciact

Phase transitions and transport properties in tetra-n-butylammonium iodide Научная публикация

Журнал

Solid State Ionics
ISSN: 0167-2738

Вых. Данные

Год: 2019, Том: 336, Страницы: 26-30 Страниц : 5 DOI: 10.1016/j.ssi.2019.02.024

Авторы

Iskakova A.A. ¹ , Asanbaeva N.B. ¹ , Gerasimov K.B. ¹ , Uvarov N.F. ^1,2,3 , Slobodyuk A.B. ⁴ , Kavun V.Ya. ⁴

Организации

1	Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences
2	Федеральное государственное автономное образовательное учреждение высшего образования «Новосибирский национальный исследовательский государственный университет»
3	Федеральное государственное бюджетное образовательное учреждение высшего образования «Новосибирский государственный технический университет»
4	Institute of Chemistry of the Far-Eastern Division of the Russian Academy of Sciences

A remarkable feature of organic salts is easy reorientation of organic groups, especially in high-temperature phases. It would be expected that the reorientational motion of organic groups promotes also ion transport processes within the crystal structure. In this work thermal and transport properties of solid organic salt (nC4H9)4NI were investigated by methods of DSC, dilatometry, conductivity measurements and NMR spectroscopy. It was proposed that three low-temperature phases, II, III and IV, along to the high-temperature phase I appear in this salt after heat treatment. The conductivity and temperature stability range of the low-temperature phases depend on conditions of the heat treatment of the salt. Temperature intervals of stability of phases II and III considerably increases after prolonged heating in the melt. In parallel, the conductivity of all low-temperature phases increases in contrast to the conductivity of the phase I. These facts may be explained by the formation of extrinsic iodine vacancies as a result of the dissolution of tributylanine formed at partial thermal decomposition of the salt. According to 1 H NMR data, in high-temperature phase TBA cations are mobile. No information on anionic diffusion in this phase was obtained due to a low intensity of 127I NMR spectra. The most mobile defects in low-temperature phases of (n-C4H9)4NI seem to be iodine vacancies.

Iskakova A.A. , Asanbaeva N.B. , Gerasimov K.B. , Uvarov N.F. , Slobodyuk A.B. , Kavun V.Y.
Phase transitions and transport properties in tetra-n-butylammonium iodide
Solid State Ionics. 2019. V.336. P.26-30. DOI: 10.1016/j.ssi.2019.02.024 WOS Scopus РИНЦ OpenAlex

Поступила в редакцию:	30 сент. 2018 г.
Опубликована online:	26 февр. 2019 г.

Web of science:	WOS:000470951300004
Scopus:	2-s2.0-85063077165
РИНЦ:	38671149
OpenAlex:	W2922882737

БД	Цитирований
OpenAlex	8
Web of science	6
Scopus	6