Structure Characterization of Solid-State Amorphized Materials by X-Ray and Neutron Diffraction

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

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The Structure of Co(.eta.-C5H5)2+ and NMe4+ Intercalates of MnPS3: An X-ray, Neutron-Diffraction, and Solid-State NMR Study

Journal of the American Chemical Society ◽

10.1021/ja00121a017 ◽

1995 ◽

Vol 117 (16) ◽

pp. 4595-4606 ◽

Cited By ~ 16

Author(s):

J. S. O. Evans ◽

D. O'Hare ◽

R. Clement

Keyword(s):

Solid State ◽

Neutron Diffraction ◽

Solid State Nmr ◽

X Ray ◽

Nmr Study

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Structural characterization of two K2SnX(PO4)3 (X=Fe,Yb) with langbeinite structure

Powder Diffraction ◽

10.1154/1.2246229 ◽

2006 ◽

Vol 21 (3) ◽

pp. 214-219 ◽

Cited By ~ 7

Author(s):

Abderrahim Aatiq ◽

Btissame Haggouch ◽

Rachid Bakri ◽

Youssef Lakhdar ◽

Ismael Saadoune

Keyword(s):

Solid State ◽

Powder Diffraction ◽

Room Temperature ◽

Cell Parameter ◽

Rietveld Analysis ◽

Conventional Solid State Reaction ◽

X Ray ◽

Octahedral Sites ◽

Parameter Values

Structures of two K2SnX(PO4)3(X=Fe,Yb) phosphates, obtained by conventional solid state reaction techniques at 950 °C, were determined at room temperature by X-ray powder diffraction using Rietveld analysis. The two materials exhibit the langbeinite-type structure (P213 space group, Z=4). Cubic unit cell parameter values are: a=9.9217(4) Å and a=10.1583(4) Å for K2SnFe(PO4)3 and K2SnYb(PO4)3, respectively. Structural refinements show that the two crystallographically independent octahedral sites (of symmetry 3) have a mixed Sn∕X (X=Fe,Yb) population although ordering is stronger in the Yb phase than in the Fe phase.

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Synthesis and structural characterization of a magnesium phthalocyanine(3–) anion

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424611004440 ◽

2012 ◽

Vol 16 (01) ◽

pp. 154-162 ◽

Cited By ~ 24

Author(s):

Edwin W.Y. Wong ◽

Daniel B. Leznoff

Keyword(s):

Absorption Spectrum ◽

Solid State ◽

Single Crystal ◽

Structural Characterization ◽

Heterometallic Complex ◽

State Structure ◽

Solid State Structure ◽

X Ray ◽

X Ray Crystallography

The reduction of magnesium phthalocyanine (MgPc) with 2.2 equivalents of potassium graphite in 1,2-dimethoxyethane (DME) gives [K2(DME)4]PcMg(OH)(1) in 67% yield. Compound 1 was structurally characterized using single crystal X-ray crystallography and was found to be a monomeric, heterometallic complex consisting of a μ3-OH ligand that bridges a [MgIIPc3-]- anion to two potassium cations solvated by four DME molecules. An absorption spectrum of 1 confirms the Pc ligand is singly reduced and has a 3–charge. The solid-state structure of 1 does not indicate breaking of the aromaticity of the Pc ligand. Compound 1 is only the second Pc3- complex and the first reduced MgPc to be isolated and structurally characterized.

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