Spectroscopic characterization of the polycrystalline copper(I) di-n-butyldithiophosphate cluster – Cu8[S2P(O-n-Bu)2]6(μ8-S): Solid-state 31P CP/MAS and static 65Cu NMR studies

2006 ◽  
Vol 359 (12) ◽  
pp. 3903-3910 ◽  
Author(s):  
Daniela Rusanova ◽  
Kevin J. Pike ◽  
Ray Dupree ◽  
John V. Hanna ◽  
Oleg N. Antzutkin ◽  
...  
Keyword(s):  
Solid State ◽  
Spectroscopic Characterization ◽  
Polycrystalline Copper ◽  
Nmr Studies

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

Characterization of metallurgical-grade aluminas and their precursors by 27Al NMR and XRD

2007 ◽  
Vol 85 (10) ◽  
pp. 889-897 ◽  
Author(s):  
Linus M Perander ◽  
Zoran D Zujovic ◽  
Tania Groutso ◽  
Margaret M Hyland ◽  
Mark E Smith ◽  
...  
Keyword(s):  
Solid State ◽  
High Field ◽  
Structural Complexity ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Nmr Studies ◽  
Transition Alumina ◽  
Angle Spinning ◽  
Alpha Alumina

The structure of metallurgical- or smelter-grade aluminas (MGAs) is complex and poorly understood. Ultra-high-field solid-state 27Al NMR results on industrial as well as on laboratory-prepared aluminas are discussed in relation to XRD results. It is demonstrated that high-field NMR can effectively be used to quantify the proportion of the thermodynamically stable alpha-alumina phase in these materials. The results demonstrate that 27Al NMR is a vital adjunct to XRD methods to quantify the transition alumina phases that invariably dominate the MGAs. The nature of the disorder in these materials, determined by 27Al NMR, is also compared with literature data, such as XANES and EXAFS studies, on typical laboratory-prepared materials. The utility of 27Al NMR studies to provide new insight into the structural complexity of metallurgical aluminas is shown.Key words: solid-state magic-angle-spinning NMR, metallurgical-grade alumina, transition alumina, gamma-alumina, coordination number.

Overexpression, purification, and characterization of recombinant Ca-ATPase regulators for high-resolution solution and solid-state NMR studies

2003 ◽  
Vol 30 (2) ◽  
pp. 253-261 ◽  
Author(s):  
Bethany Buck ◽  
Jamillah Zamoon ◽  
Tara L Kirby ◽  
Tara M DeSilva ◽  
Christine Karim ◽  
...  
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Solid State Nmr ◽  
Purification And Characterization ◽  
Nmr Studies

Synthesis and characterization of periodic porous benzene-silica hybrid powders with cubic and hexagonal symmetries

2002 ◽  
Vol 726 ◽  
Author(s):  
Valérie Goletto ◽  
Anne-Claire Bled ◽  
Gregor Trimmel ◽  
Michel Wong Chi Man ◽  
Hee-Gweon Woo ◽  
...  
Keyword(s):  
Solid State ◽  
Solvent Extraction ◽  
Mas Nmr ◽  
Synthesis And Characterization ◽  
Nmr Studies ◽  
Acidic Conditions ◽  
Silica Hybrid

AbstractOrganosilica powders with uniformly distributed bridging benzene groups have been synthesized from the condensation of bis- or tris-(triethoxysilyl)benzene in the presence of cetyltrimethylammoniumbromide. The syntheses were performed under strong acidic conditions and the organic groups were always incorporated without cleavage of the Si-C bonds as indicated by solid state MAS NMR studies. Depending on the nature of the precursors, materials with different ordering were obtained: a 2D-hexagonal (p6m) phase was formed from the 1,3-bis(triethoxysilyl)benzene, whereas the 1,4-bis(triethoxysilyl)benzene lead to a cubic Pm3n phase. The surfactant was removed either by solvent extraction or by controlled calcination, which did not affect the mesostructure of the materials.

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