Standard

Low-temperature thermodynamic properties of dimeric tris(2,2,6,6-tetramethyl-3,5-heptanedionato) europium. / Bespyatov, M. A.; Cherniaikin, I. S.; Stabnikov, P. A. et al.

In: Journal of Chemical Thermodynamics, Vol. 140, 105904, 01.01.2020.

Research output: Contribution to journal › Article › peer-review

Harvard

Bespyatov, MA, Cherniaikin, IS, Stabnikov, PA, Tsygankova, AR, Kuzin, TM & Gelfond, NV 2020, 'Low-temperature thermodynamic properties of dimeric tris(2,2,6,6-tetramethyl-3,5-heptanedionato) europium', Journal of Chemical Thermodynamics, vol. 140, 105904. https://doi.org/10.1016/j.jct.2019.105904

APA

Bespyatov, M. A., Cherniaikin, I. S., Stabnikov, P. A., Tsygankova, A. R., Kuzin, T. M., & Gelfond, N. V. (2020). Low-temperature thermodynamic properties of dimeric tris(2,2,6,6-tetramethyl-3,5-heptanedionato) europium. Journal of Chemical Thermodynamics, 140, [105904]. https://doi.org/10.1016/j.jct.2019.105904

Vancouver

Bespyatov MA, Cherniaikin IS, Stabnikov PA, Tsygankova AR, Kuzin TM, Gelfond NV. Low-temperature thermodynamic properties of dimeric tris(2,2,6,6-tetramethyl-3,5-heptanedionato) europium. Journal of Chemical Thermodynamics. 2020 Jan 1;140:105904. doi: 10.1016/j.jct.2019.105904

Author

Bespyatov, M. A. ; Cherniaikin, I. S. ; Stabnikov, P. A. et al. / Low-temperature thermodynamic properties of dimeric tris(2,2,6,6-tetramethyl-3,5-heptanedionato) europium. In: Journal of Chemical Thermodynamics. 2020 ; Vol. 140.

BibTeX

@article{dc1940717238446ab3dc31bb4f541b45,
title = "Low-temperature thermodynamic properties of dimeric tris(2,2,6,6-tetramethyl-3,5-heptanedionato) europium",
abstract = "A sample of dimeric tris(2,2,6,6-tetramethyl-3,5-heptanedionato) europium ([Eu(C11H19O2)3]2 or dipivaloylmethanate europium) was synthesized. Chemical analysis, elemental analysis and X-ray crystallography were used to characterize composition and structure of the complex. Low-temperature heat capacity of the sample was measured by adiabatic method in a temperature range from 8.63 K to 312.90 K. The Debye temperature at 0 K was calculated. Thermodynamic functions (entropy, enthalpy, reduced Gibbs energy) in a range (0–312) K have been calculated using the obtained experimental heat capacity data. An anomaly in the functional behaviour of heat capacity was detected in a temperature range from 250 K to 270 K, with a maximum at Tc = (262.36 ± 0.01) K. A reversible colour change (thermochromism) of europium dipivaloylmethanate crystals upon cooling below 245 K was detected. Anomalous contributions to entropy and enthalpy have been revealed. The nature of the effects detected is discussed.",
keywords = "Adiabatic calorimetry, Europium (III) beta-diketonates, Low-temperature heat capacity, Thermochromism, Thermodynamic functions, TRANSITION, VIBRATION-SPECTRA, HEAT-CAPACITY, DEPENDENCE",
author = "Bespyatov, {M. A.} and Cherniaikin, {I. S.} and Stabnikov, {P. A.} and Tsygankova, {A. R.} and Kuzin, {T. M.} and Gelfond, {N. V.}",
note = "The reported study was funded by RFBR according to theresearch projectNo19-03-00385 and was supported by the Min-istry of Science and Education of the Russian Federation.",
year = "2020",
month = jan,
day = "1",
doi = "10.1016/j.jct.2019.105904",
language = "English",
volume = "140",
journal = "Journal of Chemical Thermodynamics",
issn = "0021-9614",
publisher = "Academic Press Inc.",

}

RIS

TY - JOUR

T1 - Low-temperature thermodynamic properties of dimeric tris(2,2,6,6-tetramethyl-3,5-heptanedionato) europium

AU - Bespyatov, M. A.

AU - Cherniaikin, I. S.

AU - Stabnikov, P. A.

AU - Tsygankova, A. R.

AU - Kuzin, T. M.

AU - Gelfond, N. V.

N1 - The reported study was funded by RFBR according to theresearch projectNo19-03-00385 and was supported by the Min-istry of Science and Education of the Russian Federation.

PY - 2020/1/1

Y1 - 2020/1/1

N2 - A sample of dimeric tris(2,2,6,6-tetramethyl-3,5-heptanedionato) europium ([Eu(C11H19O2)3]2 or dipivaloylmethanate europium) was synthesized. Chemical analysis, elemental analysis and X-ray crystallography were used to characterize composition and structure of the complex. Low-temperature heat capacity of the sample was measured by adiabatic method in a temperature range from 8.63 K to 312.90 K. The Debye temperature at 0 K was calculated. Thermodynamic functions (entropy, enthalpy, reduced Gibbs energy) in a range (0–312) K have been calculated using the obtained experimental heat capacity data. An anomaly in the functional behaviour of heat capacity was detected in a temperature range from 250 K to 270 K, with a maximum at Tc = (262.36 ± 0.01) K. A reversible colour change (thermochromism) of europium dipivaloylmethanate crystals upon cooling below 245 K was detected. Anomalous contributions to entropy and enthalpy have been revealed. The nature of the effects detected is discussed.

AB - A sample of dimeric tris(2,2,6,6-tetramethyl-3,5-heptanedionato) europium ([Eu(C11H19O2)3]2 or dipivaloylmethanate europium) was synthesized. Chemical analysis, elemental analysis and X-ray crystallography were used to characterize composition and structure of the complex. Low-temperature heat capacity of the sample was measured by adiabatic method in a temperature range from 8.63 K to 312.90 K. The Debye temperature at 0 K was calculated. Thermodynamic functions (entropy, enthalpy, reduced Gibbs energy) in a range (0–312) K have been calculated using the obtained experimental heat capacity data. An anomaly in the functional behaviour of heat capacity was detected in a temperature range from 250 K to 270 K, with a maximum at Tc = (262.36 ± 0.01) K. A reversible colour change (thermochromism) of europium dipivaloylmethanate crystals upon cooling below 245 K was detected. Anomalous contributions to entropy and enthalpy have been revealed. The nature of the effects detected is discussed.

KW - Adiabatic calorimetry

KW - Europium (III) beta-diketonates

KW - Low-temperature heat capacity

KW - Thermochromism

KW - Thermodynamic functions

KW - TRANSITION

KW - VIBRATION-SPECTRA

KW - HEAT-CAPACITY

KW - DEPENDENCE

UR - http://www.scopus.com/inward/record.url?scp=85070934042&partnerID=8YFLogxK

U2 - 10.1016/j.jct.2019.105904

DO - 10.1016/j.jct.2019.105904

M3 - Article

AN - SCOPUS:85070934042

VL - 140

JO - Journal of Chemical Thermodynamics

JF - Journal of Chemical Thermodynamics

SN - 0021-9614

M1 - 105904

ER -

ID: 21345172