scholarly journals Solid state linear-dichroic infrared (IR-LD) spectroscopic characterization of α-and β-glycine polymorphs

2006 ◽  
Vol 4 (1) ◽  
pp. 111-117 ◽  
Author(s):  
Bojidarka Ivanova
Keyword(s):  
Liquid Crystal ◽  
Solid State ◽  
Structural Analysis ◽  
Nematic Liquid Crystal ◽  
Spectroscopic Analysis ◽  
Spectroscopic Characterization ◽  
State Orientation ◽  
Orientation Technique

AbstractIR-LD spectroscopic analysis using nematic liquid crystal suspension as a solid-state orientation technique and the reducing-difference procedure for polarized spectra interpretation are applied to the α-and β-polymorphs of glycine. Both structural analysis and detailed IR band assignments were carried out.

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

Solid-State Spectroscopic Characterization of α-Chitins Deacetylated in Homogeneous Solutions

2012 ◽  
Vol 116 (15) ◽  
pp. 4584-4592 ◽  
Author(s):  
Kai Zhang ◽  
Andreas Geissler ◽  
Steffen Fischer ◽  
Erica Brendler ◽  
Ernst Bäucker
Keyword(s):  
Solid State ◽  
Spectroscopic Characterization ◽  
Homogeneous Solutions
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