Racemic crystals of trolox derivatives compared to their chiral counterparts: Structural studies using solid-state NMR, DFT calculations and X-ray diffraction

2018 ◽  
Vol 1156 ◽  
pp. 290-300 ◽  
Author(s):  
P. Wałejko ◽  
K. Paradowska ◽  
Ł. Szeleszczuk ◽  
S. Wojtulewski ◽  
A. Baj
Keyword(s):  
Solid State ◽  
Dft Calculations ◽  
Solid State Nmr ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Racemic Crystals

Structural refinement of the RT LaOF phases by coupling powder X-Ray diffraction, 19F and 139La solid state NMR and DFT calculations of the NMR parameters

2015 ◽  
Vol 44 (47) ◽  
pp. 20675-20684 ◽  
Author(s):  
Jamal Dabachi ◽  
Monique Body ◽  
Jens Dittmer ◽  
Franck Fayon ◽  
Christophe Legein
Keyword(s):  
Solid State ◽  
Dft Calculations ◽  
Solid State Nmr ◽  
Structural Refinement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nmr Parameters

The structures of the RT LaOF phases have been refined by coupling XRPD, multinuclear solid state NMR and DFT calculations.

Revisiting the crystal structure of dickite: X-ray diffraction, solid-state NMR, and DFT calculations study

2018 ◽  
Vol 103 (5) ◽  
pp. 812-818 ◽  
Author(s):  
João Rocha ◽  
Filipe A. Almeida Paz ◽  
Mariana Sardo ◽  
Luís Mafra
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Dft Calculations ◽  
Solid State Nmr ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Combining solid state NMR, powder X-ray diffraction, and DFT calculations for CsSc3F10 structure determination

2019 ◽  
Vol 787 ◽  
pp. 1349-1355 ◽  
Author(s):  
Aydar Rakhmatullin ◽  
Mathieu Allix ◽  
Ilya B. Polovov ◽  
Dmitry Maltsev ◽  
Andrey V. Chukin ◽  
...  
Keyword(s):  
Solid State ◽  
Dft Calculations ◽  
Structure Determination ◽  
Solid State Nmr ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Synthesis, characterization and modeling of self-assembled porphyrin nanorods

2019 ◽  
Vol 23 (11n12) ◽  
pp. 1346-1354 ◽  
Author(s):  
Danielle Laurencin ◽  
Pascal G. Yot ◽  
Christel Gervais ◽  
Yannick Guari ◽  
Sébastien Clément ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Dft Calculations ◽  
Powder Diffraction ◽  
Solid State Nmr ◽  
Molecular Level ◽  
Ion Association ◽  
Free Base ◽  
X Ray ◽  
Solid State Nmr Spectroscopy

Porphyrin nanorods were prepared by ion-association between free-base meso 5,10,15,20-tetrakis-(4-[Formula: see text]-methylpyridinium)porphyrin cations and tetraphenylborate anions. The nanorods have variable lengths (up to a few micrometers long) and diameters ([Formula: see text]50–500 nm). Their structure at the molecular level was elucidated by combining multinuclear solid state NMR spectroscopy, synchrotron X-ray powder diffraction and DFT calculations.

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 Characterization of a brazilian smectite by solid state NMR and X-ray diffraction techniques

1997 ◽  
Vol 8 (6) ◽  
pp. 581-586 ◽  
Author(s):  
Alcides Wagner Serpa Guarino ◽  
Rosane A. S. San Gil ◽  
Helena Polivanov ◽  
Sonia M.C. Menezes
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
X Ray Diffraction ◽  
X Ray

Gallium-containing Heusler phases ScRh2Ga, ScPd2Ga, TmRh2Ga and LuRh2Ga – magnetic and solid state NMR-spectroscopic characterization

2017 ◽  
Vol 72 (8) ◽  
pp. 609-615
Author(s):  
Lukas Heletta ◽  
Stefan Seidel ◽  
Christopher Benndorf ◽  
Hellmut Eckert ◽  
Rainer Pöttgen
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Spectroscopic Characterization ◽  
Structural Disorder ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
Phase Purity ◽  
X Ray ◽  
Arc Melting ◽  
Pauli Paramagnetism

AbstractThe gallium-containing Heusler phases ScRh2Ga, ScPd2Ga, TmRh2Ga and LuRh2Ga have been synthesized by arc-melting of the elements followed by different annealing sequences to improve phase purity. The samples have been studied by powder X-ray diffraction. The structures of Lu0.97Rh2Ga1.03 (Fm3̅m, a=632.94(5) pm, wR2=0.0590, 46 F2 values, seven variables) and Sc0.88Rh2Ga1.12 (a=618.91(4) pm, wR2=0.0284, 44 F2 values, six variables) have been refined from single crystal X-ray diffractometer data. Both gallides show structural disorder through Lu/Ga and Sc/Ga mixing. Temperature dependent magnetic susceptibility measurements showed Pauli paramagnetism for ScRh2Ga, ScPd2Ga, and LuRh2Ga and Curie-Weiss paramagnetism for TmRh2Ga. 45Sc and 71Ga solid state MAS NMR spectroscopic investigations of the Sc containing compounds confirmed the site mixing effects typically observed for Heusler phases. The data indicate that the effect of mixed Sc/Ga occupancy is significantly stronger in ScRh2Ga than in ScPd2Ga.

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