Thermodynamic properties and molecular dynamics of (NH4)2Zn(SO4)2•6H2O studied by single-crystal NMR and MAS NMR

被引：1

作者：

Lim, Ae Ran ^{[1
]}

机构：

[1] Jeonju Univ, Dept Sci Educ, Jeonju 560759, South Korea

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2013年 / 114卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

Tutton salts; (NH4)(2)Zn(SO4)(2); 6H(2)O; Thermodynamic property; Rotational motion; NMR relaxation; Phase transition; PHASE-TRANSITIONS; TEMPERATURE-DEPENDENCE; X-RAY; EPR; ZN(NH4)2(SO4)2.6H2O; IONS;

D O I：

10.1007/s10973-013-3068-5

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The thermodynamic properties and molecular dynamics of (NH4)(2)Zn(SO4)(2)center dot 6H(2)O were investigated using thermogravimetric analysis, differential scanning calorimetry, and nuclear magnetic resonance observations. The first mass loss occurs near 350 K (= T (d)) and is interpreted as the onset of partial thermal decomposition. The temperature dependences of the spin-lattice relaxation time in laboratory frame T (1) and in rotating frame T (1 rho) for H nuclei were studied near T (d) and T (C1). The increase in T (1) near T (d) seems to be related to the ammonium protons, and the abrupt decrease in T (1 rho) near T (d) can be explained due to the loss of H2O.

引用

页码：699 / 703

页数：5

共 17 条

[1] Thermal and optical properties of Cu(II)-doped magnesium rubidium sulfate hexahydrate crystals
Anandalakshmi, H.
Parthiban, S.
Parvathi, V.
Thanikachalam, V.
Mojumdar, S. C.
[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2011, 104 (03) : 963 - 967
[2] HEXAAQUA DIPOSITIVE IONS OF THE 1ST TRANSITION SERIES - NEW AND ACCURATE STRUCTURES - EXPECTED AND UNEXPECTED TRENDS
COTTON, FA
DANIELS, LM
MURILLO, CA
QUESADA, JF
[J]. INORGANIC CHEMISTRY, 1993, 32 (22) : 4861 - 4867
[3] THERMODYNAMIC PROPERTIES AND PHASE-TRANSITIONS OF SALT HYDRATES BETWEEN 270 AND 400-K .1. NH4AL(SO4)2.12H2O, KAL(SO4)2.12H2O, AL2(SO4)3.17H2O, ZNSO4.7H2O, NA2SO4.10H2O, AND NA2S2O3.5H2O
GRONVOLD, F
MEISINGSET, KK
[J]. JOURNAL OF CHEMICAL THERMODYNAMICS, 1982, 14 (11) : 1083 - 1098
[4] TEMPERATURE-DEPENDENCE OF THE STRUCTURE AND BONDING IN DEUTERATED CU(II) TUTTON SALT
HATHAWAY, BJ
HEWAT, AW
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 1984, 51 (03) : 364 - 375
[5] Cooperative Jahn-Teller interactions in dynamic copper(II) complexes. Temperature dependence of the crystal structure and EPR spectrum of deuterated ammonium copper(II) sulfate hexahydrate
Hitchman, MA
Maaskant, W
van der Plas, J
Simmons, CJ
Stratemeier, H
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1999, 121 (07) : 1488 - 1501
[6] Complex motions of X-ray induced NH3+ radicals in Tutton salt (NH4)2Zn(SO4)2•6H2O single crystals observed by EPR and ESEEM spectroscopy
Hoffmann, S. K.
Radczyk, T.
[J]. MOLECULAR PHYSICS, 2006, 104 (15) : 2423 - 2432
[7] EPR OF MN2+ IN HYDRATED DOUBLE SULFATES
JAIN, VK
VENKATESWARLU, P
[J]. JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1979, 12 (05): : 865 - 872
[8] The crystal structure of Tutton's salt type K2[Co(H2O)6](SO4)2.: A combined X-ray and neutron study
Kirfel, A
Klapper, H
Schafer, W
Schwabenlander, F
[J]. ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 1998, 213 (09): : 456 - 460
[9] Temperature evolution of the thermal expansion tensors of ammonium Tutton salts
Kockelmann, W
Meents, A
Kirfel, A
[J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2002, 74 (Suppl 1): : S1329 - S1332
[10] Thermodynamic properties and phase transitions of Tutton salt (NH4)2Co(SO4)2•6H2O crystals
Lim, Ae Ran
[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2012, 109 (03) : 1619 - 1623

← 1 2 →