Order-disorder phase transitions in Zn2(C8H4O4)2
                        .C6H12N2 in atmospheres of noble gases

D. P. Pishchur; N. B. Kompankov; A. A. Lysova; S. G. Kozlova

doi:10.1016/j.jct.2018.10.004

Order-disorder phase transitions in Zn₂(C₈H₄O₄)₂ ^.C₆H₁₂N₂ in atmospheres of noble gases

D. P. Pishchur, N. B. Kompankov, A. A. Lysova, S. G. Kozlova

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

4 Цитирования (Scopus)

Аннотация

The molar heat capacity of Zn₂(C₈H₄O₄)₂ ^.C₆H₁₂N₂ (Zn-DMOF) was measured for the first time at 4.8–302 K in atmospheres of noble gases ³He, ⁴He, and ⁴⁰Ar under pressures P up to 1.52·10⁵ Pa. It is shown that phase transitions reported earlier at T_c = 13, 58.9, and 131.2 K are second-order phase transitions associated with the ordering/disordering of organic ligands in Zn-DMOF. The transition entropy (ΔS_m) in the temperature range of phase transitions associated with the ordering/disordering of C₆H₁₂N₂ molecules decreases at T_c = 13 K and increases at T_c = 58.9 K as P increases from 0.51·10⁵ to 1.52·10⁵ Pa. The values of ΔS_m do not depend on P in the region of the phase transition at T_c = 131.2 K associated with the ordering/disordering of C₈H₄O₄ ²⁻ anions.

Язык оригинала	английский
Страницы (с-по)	147-153
Число страниц	7
Журнал	Journal of Chemical Thermodynamics
Том	130
DOI	https://doi.org/10.1016/j.jct.2018.10.004
Состояние	Опубликовано - 1 янв 2019

Доступ к документу

10.1016/j.jct.2018.10.004

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title = "Order-disorder phase transitions in Zn2(C8H4O4)2 .C6H12N2 in atmospheres of noble gases",

abstract = "The molar heat capacity of Zn2(C8H4O4)2 .C6H12N2 (Zn-DMOF) was measured for the first time at 4.8–302 K in atmospheres of noble gases 3He, 4He, and 40Ar under pressures P up to 1.52·105 Pa. It is shown that phase transitions reported earlier at Tc = 13, 58.9, and 131.2 K are second-order phase transitions associated with the ordering/disordering of organic ligands in Zn-DMOF. The transition entropy (ΔSm) in the temperature range of phase transitions associated with the ordering/disordering of C6H12N2 molecules decreases at Tc = 13 K and increases at Tc = 58.9 K as P increases from 0.51·105 to 1.52·105 Pa. The values of ΔSm do not depend on P in the region of the phase transition at Tc = 131.2 K associated with the ordering/disordering of C8H4O4 2− anions.",

keywords = "Adiabatic calorimetry, Heat capacity, Noble gases loading, Phase transition, Zn-DMOF, STORAGE, METAL-ORGANIC FRAMEWORKS, BEHAVIOR, FLEXIBILITY, HEAT-CAPACITY, MOLECULES",

author = "Pishchur, {D. P.} and Kompankov, {N. B.} and Lysova, {A. A.} and Kozlova, {S. G.}",

year = "2019",

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doi = "10.1016/j.jct.2018.10.004",

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Order-disorder phase transitions in Zn₂(C₈H₄O₄)₂ ^.C₆H₁₂N₂ in atmospheres of noble gases. / Pishchur, D. P.; Kompankov, N. B.; Lysova, A. A.; Kozlova, S. G.

В: Journal of Chemical Thermodynamics, Том 130, 01.01.2019, стр. 147-153.

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

TY - JOUR

T1 - Order-disorder phase transitions in Zn2(C8H4O4)2 .C6H12N2 in atmospheres of noble gases

AU - Pishchur, D. P.

AU - Kompankov, N. B.

AU - Lysova, A. A.

AU - Kozlova, S. G.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The molar heat capacity of Zn2(C8H4O4)2 .C6H12N2 (Zn-DMOF) was measured for the first time at 4.8–302 K in atmospheres of noble gases 3He, 4He, and 40Ar under pressures P up to 1.52·105 Pa. It is shown that phase transitions reported earlier at Tc = 13, 58.9, and 131.2 K are second-order phase transitions associated with the ordering/disordering of organic ligands in Zn-DMOF. The transition entropy (ΔSm) in the temperature range of phase transitions associated with the ordering/disordering of C6H12N2 molecules decreases at Tc = 13 K and increases at Tc = 58.9 K as P increases from 0.51·105 to 1.52·105 Pa. The values of ΔSm do not depend on P in the region of the phase transition at Tc = 131.2 K associated with the ordering/disordering of C8H4O4 2− anions.

AB - The molar heat capacity of Zn2(C8H4O4)2 .C6H12N2 (Zn-DMOF) was measured for the first time at 4.8–302 K in atmospheres of noble gases 3He, 4He, and 40Ar under pressures P up to 1.52·105 Pa. It is shown that phase transitions reported earlier at Tc = 13, 58.9, and 131.2 K are second-order phase transitions associated with the ordering/disordering of organic ligands in Zn-DMOF. The transition entropy (ΔSm) in the temperature range of phase transitions associated with the ordering/disordering of C6H12N2 molecules decreases at Tc = 13 K and increases at Tc = 58.9 K as P increases from 0.51·105 to 1.52·105 Pa. The values of ΔSm do not depend on P in the region of the phase transition at Tc = 131.2 K associated with the ordering/disordering of C8H4O4 2− anions.

KW - Adiabatic calorimetry

KW - Heat capacity

KW - Noble gases loading

KW - Phase transition

KW - Zn-DMOF

KW - STORAGE

KW - METAL-ORGANIC FRAMEWORKS

KW - BEHAVIOR

KW - FLEXIBILITY

KW - HEAT-CAPACITY

KW - MOLECULES

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U2 - 10.1016/j.jct.2018.10.004

DO - 10.1016/j.jct.2018.10.004

M3 - Article

AN - SCOPUS:85054719433

VL - 130

SP - 147

EP - 153

JO - Journal of Chemical Thermodynamics

JF - Journal of Chemical Thermodynamics

SN - 0021-9614

ER -