Self-Diffusion, Overall Rotation of Molecules, and Ring Motions in the Three Solid Phases of Formylferrocene, Fe(C5H5) (C5H4CHO), as Studied by 1H NMR and Differential Thermal Analysis

1986 ◽  
Vol 90 (5) ◽  
pp. 479-485 ◽  
Author(s):  
Atsushi Kubo ◽  
Ryuichi Ikeda ◽  
Daiyu Nakamura
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
1H Nmr ◽  
Self Diffusion ◽  
Solid Phases

Structural Phase Transitions in Solid tert-Butylammonium Nitrate as Studied by Differential Thermal Analysis and 1H-NMR

1989 ◽  
Vol 44 (1) ◽  
pp. 71-74
Author(s):  
Hiroyuki Ishida ◽  
Tadashi Iwachido ◽  
Naomi Hayama ◽  
Ryuichi Ikeda ◽  
Miyuki Hashimoto ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Solid Phase ◽  
Structural Phase ◽  
Structural Phase Transitions ◽  
Self Diffusion ◽  
H Nmr ◽  
Nmr Techniques ◽  
Plastic Phase ◽  
Solid Phases

Abstract Seven solid phases including three metastable phases of (CH3)3CNH3NO3 were revealed by differential thermal analysis in the temperature range between 80 K and the melting point (418 K), and cationic dynamics in each phase was studied by use of 1H-NMR techniques. The highesttemperature solid phase obtainable above 412 K was found to be an ionic plastic phase, where the cations perform rapid translational self-diffusion and overall rotation about their center of gravity.

Solid phase precipitates in (Zr,Th)-OH-(oxalate, malonate) ternary aqueous system

2009 ◽  
Vol 97 (4-5) ◽  
Author(s):  
Taishi Kobayashi ◽  
Takayuki Sasaki ◽  
I. Takagi ◽  
Hirotake Moriyama
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Solid Phase ◽  
Aqueous System ◽  
Carboxylate Ligand ◽  
X Ray Diffraction ◽  
Large Excess ◽  
X Ray ◽  
Acidic Conditions ◽  
Solid Phases

AbstractThe solubility-limiting solid phases in the ternary aqueous systems of Zr(IV)/OH/oxalate, Zr(IV)/OH/malonate, Th(IV)/OH/oxalate and Th(IV)/OH/malonate were characterized by elemental analysis, X-ray diffraction, thermogravimetric analysis and differential thermal analysis. The ternary solid phase of M(IV)/OH/carboxylate was observed to form, even under acidic conditions, depending on the pH and the concentration of carboxylate ligand. In the presence of a large excess of carboxylic acid, however; the binary M(IV)-carboxylate solid phase formed.

Cationic Self-Diffusion in the Highest-Temperature Solid Phases of Ammonium Chloride and Bromide Studied by 1H NMR

1992 ◽  
Vol 96 (4) ◽  
pp. 550-553 ◽  
Author(s):  
Masataka Tansho ◽  
Yoshihiro Furukawa ◽  
Daiyu Nakamura ◽  
Ryuichi Ikeda
Keyword(s):  
Ammonium Chloride ◽  
1H Nmr ◽  
Self Diffusion ◽  
Solid Phases

1H NMR and Thermal Studies of CH3NH3Br in a Metastable Solid Phase Newly Found above 483 K

1989 ◽  
Vol 44 (8) ◽  
pp. 738-740 ◽  
Author(s):  
Masataka Tansho ◽  
Daiyu Nakamura ◽  
Ryuichi Ikeda
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Solid Phase ◽  
Thermal Studies ◽  
Stable Phase ◽  
Self Diffusion ◽  
H Nmr ◽  
Plastic Phase ◽  
Metastable Solid Phase ◽  
Absorption Measurements

Abstract By differential thermal analysis a new high-temperature solid phase of methylammonium bromide was found between 483 K and its “melting point” (510 K). 1H NMR absorption measurements revealed the presence of rapid 3D translational self-diffusion and overall rotation of methylammonium cations in this phase. These cationic motions are quite analogous to those of methylammonium iodide in its ionic plastic phase. Surprisingly, this plastic-like phase is metastable, the stable phase in the same temperature range being liquid.

PVT and DTA Measurements on trans-4-n-Hexyl- (4'-Cyanophenyl)-Cyclohexane (6PCH) up to 300 MPa

1999 ◽  
Vol 54 (5) ◽  
pp. 281-286 ◽  
Author(s):  
M. Sandmann ◽  
F. Hamann ◽  
A. Würflinger
Keyword(s):  
Thermal Analysis ◽  
Phase Diagram ◽  
High Pressure ◽  
Differential Thermal Analysis ◽  
Phase Transitions ◽  
Melting Curve ◽  
Enthalpy Changes ◽  
Volume Entropy ◽  
Solid Phases ◽  
Specific Volumes

The phase diagram of trans-4-n-hexyl-(4'-cyanophenyl)-cyclohexane, (6PCH) has been established by high-pressure differential thermal analysis. Specific volumes are presented for temperatures between 300 and 370 K up to 300 MPa. The p,Vm ,T data have been determined for the nematic, isotropic, and (partly, in the neighbourhood to the melting curve) solid phases. Volume and enthalpy changes along the phase transitions have also been calculated. As previously, the p,Vm,T data were used to calculate the volume entropy for the nematic-isotropic transition. The molar volumes along the clearing line TNI (p) enabled us to calculate the molecular field parameter γ = ∂ln TNI/∂In VNI , being 4.1.

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