Sciact
  • EN
  • RU

Anomalous Behavior of Heat Capacity in Ni2(bdc)2(dabco). Schottky Anomaly and Spin–Phonon Interaction Научная публикация

Журнал Journal of Physical Chemistry C
ISSN: 1932-7455 , E-ISSN: 1932-7447
Вых. Данные Год: 2020, Том: 124, Номер: 37, Страницы: 20222-20227 Страниц : 6 DOI: 10.1021/acs.jpcc.0c05999
Авторы Kozlova Svetlana G. 1,2 , Pishchur Denis P. 1 , Kompankov Nikolay B. 1 , Shayapov Vladimir R. 1 , Samsonenko Denis G. 1,3
Организации
1 Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Science, Lavrenteva Av., 3, RU-630090 Novosibirsk, Russian Federation
2 Belgorod State Technological University named after V.G. Shukhov, Kostukov Av., 46, RU-308012 Belgorod, Russian Federation
3 Novosibirsk State University, Pirogova Street, 2, RU-630090 Novosibirsk, Russian Federation

Реферат: Temperature dependence of molar heat capacity of Ni2(bdc)2(dabco) was first measured by the method of vacuum adiabatic calorimetry in the temperature region of 5–295 K. A heat capacity anomaly was discovered above 60 K. The analysis of the electronic structure of a dimeric complex Ni2(O2C-)4 testifies that the observed anomaly is the Schottky anomaly caused by thermal excitation of d electrons of Ni2+(3d8) ions. The experimental heat capacity values in the vicinity of the maximum of the Schottky anomaly exceed its calculated values by ∼10%. This fact is explained by the spin–lattice interaction between d electrons of Ni2+ ions and lattice vibrations of Ni-DMOF (Ni2(bdc)2(dabco)). The obtained experimental Cp values were used to calculate standard thermodynamic functions (heat capacity, enthalpy, and entropy) of the studied compound.
Библиографическая ссылка: Kozlova S.G. , Pishchur D.P. , Kompankov N.B. , Shayapov V.R. , Samsonenko D.G.
Anomalous Behavior of Heat Capacity in Ni2(bdc)2(dabco). Schottky Anomaly and Spin–Phonon Interaction
Journal of Physical Chemistry C. 2020. V.124. N37. P.20222-20227. DOI: 10.1021/acs.jpcc.0c05999 WOS Scopus РИНЦ OpenAlex
Даты:
Поступила в редакцию: 1 июл. 2020 г.
Опубликована online: 28 авг. 2020 г.
Идентификаторы БД:
Web of science: WOS:000574908200036
Scopus: 2-s2.0-85095791712
РИНЦ: 45185487
OpenAlex: W3081824130
Цитирование в БД:
БД Цитирований
OpenAlex 3
Scopus 3
Web of science 4
РИНЦ 3
Альметрики: