Phase transition ofL-Ser monohydrate crystal studied by13C solid-state NMR

2006 ◽  
Vol 44 (3) ◽  
pp. 318-324 ◽  
Author(s):  
Tsunenori Kameda ◽  
Hidetoshi Teramoto
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Solid State Nmr

Characterization of some mesogenic alkyl 1-thioglycosides

2002 ◽  
Vol 80 (8) ◽  
pp. 1162-1165 ◽  
Author(s):  
B Henrissat ◽  
G K Hamer ◽  
M G Taylor ◽  
R H Marchessault
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Solid State ◽  
Solid State Nmr ◽  
Liquid Crystalline ◽  
Liquid Crystal Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Liquid Crystalline Phases

A series of dodecyl 1-thio-β-D-glycosides has been synthesized and characterized (DSC, NMR, CP MAS, X-ray diffraction) as possible new marking materials with liquid-crystalline properties. These compounds undergo solid to liquid crystal phase transitions at various temperatures, which depend on the nature of the carbohydrate part of the structure. Their liquid-crystalline phases show extreme shear thinning behaviour.Key words: liquid crystal, powder X-ray diffraction, phase transition, thioglycoside, solid-state NMR, marking material

Investigations of the Phase Transition and Proton Dynamics in Rubidium Methane Phosphonate Studied by Solid-State NMR

2008 ◽  
Vol 112 (13) ◽  
pp. 5221-5231 ◽  
Author(s):  
M. Vijayakumar ◽  
Jason W. Traer ◽  
James F. Britten ◽  
Gillian R. Goward
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Solid State Nmr ◽  
Proton Dynamics

207Pb NMR of PbZrO3 and PbZr1-xTixO3 Solid Solutions

2000 ◽  
Vol 658 ◽  
Author(s):  
Paolo Rossi ◽  
Matthew R. Dvorak ◽  
Gerard S. Harbison
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Solid Solutions ◽  
Solid State Nmr ◽  
Structural Changes ◽  
High Symmetry ◽  
Axially Symmetric ◽  
Line Characteristic ◽  
Shielding Tensor ◽  
Cell Changes

ABSTRACTPbZrO3 undergoes a phase transition to a paraelectric phase at 230°C. During this phase transition the unit cell changes from orthorhombic to cubic. Structural changes of PbZrO3 have been monitored using solid state NMR by measuring the variation in the 207Pb chemical shielding tensor as a function of temperature. The two distinct lead sites show rather different behavior as a function of temperature. The less shielded lead maintains an almost constant asymmetry parameter η = 0.2 from 0°C to 200°C while the more shielded lead resonance becomes more axially symmetric as the temperature is raised going from η = 0.24 at 0°C to [.eta] = 0.08 at 200°C. Powder pattern singularities become less distinct near the phase transitions, but the temperature dependence of the chemical shift tensor principal values remains continuous, and there is no evidence of an intervening higher-symmetry phase. At the phase transition, both resonances collapse into a single narrow line characteristic of a nucleus at a high-symmetry site. Results of a preliminary study of the PbZr1−xTixO3 solid solutions by 207Pb solid state NMR are also presented.

scholarly journals Structural characterization of an amorphous VS4 and its lithiation/delithiation behavior studied by solid-state NMR spectroscopy

RSC Advances ◽  
2019 ◽  
Vol 9 (41) ◽  
pp. 23979-23985 ◽  
Author(s):  
Keiji Shimoda ◽  
Kazuto Koganei ◽  
Tomonari Takeuchi ◽  
Toshiyuki Matsunaga ◽  
Miwa Murakami ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Amorphous Phase ◽  
Structural Characterization ◽  
Solid State Nmr ◽  
Solid State Nmr Spectroscopy

Amorphous VS4 (a-VS4) is prepared from the crystalline one (c-VS4). Li insertion into a-VS4 involves the amorphous–amorphous phase transition from Peierls-distorted chain-like structure to [VS4]3− tetrahedra-based structure.

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