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Thermal Stability of Ammonium-Based Thiocyanate Protic Ionic Liquids Научная публикация

Журнал Journal of Chemical & Engineering Data
ISSN: 0021-9568 , E-ISSN: 1520-5134
Вых. Данные Год: 2026, Том: 71, Номер: 2, Страницы: 376-389 Страниц : 14 DOI: 10.1021/acs.jced.5c00555
Авторы Magsumov Timur I. 1 , Gainutdinov Bulat R. 1 , Larionov Radik A. 1 , Andreev Ivan A. 2 , Ratmanova Nina K. 2 , Ivanova Olga A. 3 , Trushkov Igor V. 1,2 , Sedov Igor A. 1
Организации
1 Chemical Institute, Kazan Federal University, Kremlevskaya Str., 18, 420008 Kazan, Russian Federation
2 N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky pr. 47, 119991 Moscow, Russian Federation
3 Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, 119991 Moscow, Russian Federation

Реферат: The thermal properties of a series of recently synthesized protic ionic liquids based on the thiocyanate anion [SCN] and mono-, di-, and trialkylammonium cations, namely, methylammonium ([MA]), n-decylammonium ([DecA]), 2-phenylethylammonium ([PhEA]), 2-aminoethylammonium ([EDA]), diethylammonium ([DEA]), di-n-butylammonium ([DBA]), and tri-n-butylammonium ([TBA]), are examined. According to differential scanning calorimetry data, [DEA][SCN] and [EDA][SCN] are room-temperature ionic liquids, [DecA][SCN], [DBA][SCN], [TBA][SCN], and [PhEA][SCN] melt below 323 K, and [MA][SCN] melts below 373 K. Thermogravimetric analysis shows that the thermal stability of the studied ionic liquids under dynamic heating conditions exhibits no general correlation with the number of substituents on the nitrogen atom or with the alkyl chain length. However, primary ammonium thiocyanates have a worse long-term thermal stability. They undergo chemical changes when kept for several hours at temperatures between 353 and 373 K, which is well below the mass loss temperature in dynamic experiments. Secondary and tertiary ammonium salts do not decompose even at the temperature at which they start to lose mass due to evaporation. The operating temperature windows for thiocyanate protic ionic liquids have been determined. Among the studied liquids, [DEA][SCN] can be used within the widest temperature range (from 266 to 480 K) in various applications that require long-term thermal stability.
Библиографическая ссылка: Magsumov T.I. , Gainutdinov B.R. , Larionov R.A. , Andreev I.A. , Ratmanova N.K. , Ivanova O.A. , Trushkov I.V. , Sedov I.A.
Thermal Stability of Ammonium-Based Thiocyanate Protic Ionic Liquids
Journal of Chemical & Engineering Data. 2026. V.71. N2. P.376-389. DOI: 10.1021/acs.jced.5c00555 WOS Scopus OpenAlex
Даты:
Поступила в редакцию: 28 авг. 2025 г.
Опубликована online: 12 февр. 2026 г.
Идентификаторы БД:
Web of science: WOS:001667677900001
Scopus: 2-s2.0-105030259835
OpenAlex: W7125420807
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