scholarly journals Characterization of a Mixed Convection Cell Designed for Phase Transition Studies in Moist Air

2021 ◽  
pp. 483-493
Author(s):  
Konstantin A. Niehaus ◽  
Andreas Westhoff ◽  
Claus Wagner
Keyword(s):  
Phase Transition ◽  
Mixed Convection ◽  
Convection Cell ◽  
Moist Air ◽  
Transition Studies

Synthesis, Characterization and Phase Transition Studies on Some N-(4-Butyloxy Benzylidene)-4-Alkoxy Anilines, 4O.Om Compounds - A Dilatometric Study

2013 ◽  
Vol 2 (1) ◽  
pp. 38-47
Author(s):  
Venkata Pisipati ◽  
M. Saraswathi ◽  
D. Madhavi Latha ◽  
P. Pardhasaradhi ◽  
P. V. Datta Prasad
Keyword(s):  
Phase Transition ◽  
Differential Scanning Calorimeter ◽  
Nematic Phase ◽  
The Body ◽  
Transition Temperatures ◽  
First Order ◽  
Dilatometric Study ◽  
Dilatometric Studies ◽  
Transition Studies

Dilatometric studies are carried out on the synthesized N-(4-butyloxy benzylidene)-4-alkoxy anilines, 4O.Om compounds with the m = 3 to 7 and 9. Characterization of these compounds is done using the polarizing microscope attached with a hot stage. The differential scanning calorimeter is employed to find out the transition temperatures as well as the heats of transitions. All the compounds exhibit nematic phase with varying thermal ranges with the clearing temperatures are above 100 OC as unlike the case of the well known N-(4-butyloxy benzylidene)-4-alkyl anilines, 4O.m compounds which exhibit rich poymorphysim and the clearing temperatures are well below 100 OC. As expected the isotropic to nematic transition exhibited first order nature and the results are discussed with the body of the data available in literature.

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

scholarly journals Jahn—Teller Phase Transition in Cu0.50TiO(PO4): Powder Structural Characterization of the β-Variety and Thermal Study.

ChemInform ◽  
2007 ◽  
Vol 38 (31) ◽  
Author(s):  
Pierre Gravereau ◽  
Said Benmokhtar ◽  
Jean-Pierre Chaminade ◽  
Abdelaziz El Jazouli ◽  
Eric Lebraud ◽  
...  
Keyword(s):  
Phase Transition ◽  
Structural Characterization ◽  
Thermal Study ◽  
Jahn Teller

Temperature-dependent isomorphous phase transition studies in molecular crystals of 2,4,4′-trimethoxybenzophenone

2010 ◽  
Vol 964 (1-3) ◽  
pp. 31-38 ◽  
Author(s):  
Hoong-Kun Fun ◽  
Ching Kheng Quah ◽  
Samuel Robinson Jebas ◽  
Lye-Hock Ong
Keyword(s):  
Phase Transition ◽  
Molecular Crystals ◽  
Temperature Dependent ◽  
Transition Studies

Synthesis and order–disorder transition in a novel metal formate framework of [(CH3)2NH2]Na0.5Fe0.5(HCOO)3]

2014 ◽  
Vol 43 (45) ◽  
pp. 17075-17084 ◽  
Author(s):  
Mirosław Mączka ◽  
Adam Pietraszko ◽  
Lucyna Macalik ◽  
Adam Sieradzki ◽  
Justyna Trzmiel ◽  
...  
Keyword(s):  
Phase Transition ◽  
Synthesis And Characterization ◽  
Disorder Transition ◽  
Metal Formate

We report the synthesis and characterization of a novel metal formate templated by dimethylammonium cations, [(CH3)2NH2][Na0.5Fe0.5(HCOO)3], exhibiting phase transition at 167 K.

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