A high-resolution 13C-nmr study of collagenlike polypeptides and collagen fibrils in solid state studied by the cross-polarization-magic angle-spinning method. Manifestation of conformation-dependent 13C chemical shifts and application to conformational c

Biopolymers ◽  
1984 ◽  
Vol 23 (11) ◽  
pp. 2279-2297 ◽  
Author(s):  
Hazime Saitô ◽  
Ryoko Tabeta ◽  
Akira Shoji ◽  
Takuo Ozaki ◽  
Isao Ando ◽  
...  
Keyword(s):  
Solid State ◽  
High Resolution ◽  
13C Nmr ◽  
Chemical Shifts ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Polarization ◽  
13C Chemical Shifts ◽  
Nmr Study ◽  
Angle Spinning

scholarly journals 14N, 13C, and 119Sn solid-state NMR characterization of tin(II) carbodiimide Sn(NCN)

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Aleksander Jaworski ◽  
Jędrzej Piątek ◽  
Liuda Mereacre ◽  
Cordula Braun ◽  
Adam Slabon
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Chemical Shifts ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Quadrupolar Coupling ◽  
Nmr Study ◽  
Nmr Characterization ◽  
Angle Spinning ◽  
High Level

Abstract We report the first magic-angle spinning (MAS) nuclear magnetic resonance (NMR) study on Sn(NCN). In this compound the spatially elongated (NCN)2− ion is assumed to develop two distinct forms: either cyanamide (N≡C–N2−) or carbodiimide (−N=C=N−). Our 14N MAS NMR results reveal that in Sn(NCN) the (NCN)2− groups exist exclusively in the form of symmetric carbodiimide ions with two equivalent nitrogen sites, which is in agreement with the X-ray diffraction data. The 14N quadrupolar coupling constant | C Q | $\vert {C}_{\text{Q}}\vert $  ≈ 1.1 MHz for the −N=C=N− ion in Sn(NCN) is low when compared to those observed in molecular compounds that comprise cyano-type N≡C– moieties ( | C Q | $\vert {C}_{\text{Q}}\vert $  > 3.5 MHz). This together with the information from 14N and 13C chemical shifts indicates that solid-state NMR is a powerful tool for providing atomic-level insights into anion species present in these compounds. The experimental NMR results are corroborated by high-level calculations with quantum chemistry methods.

Solid-state bromination of poly(1,6-di-N-carbazolyl-2,4-hexadiyne): a cross polarization-magic angle spinning NMR study

1987 ◽  
Vol 109 (3) ◽  
pp. 761-768 ◽  
Author(s):  
Hellmut Eckert ◽  
James P. Yesinowski ◽  
Daniel J. Sandman ◽  
Christopher S. Velazquez
Keyword(s):  
Solid State ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Polarization ◽  
Nmr Study ◽  
Angle Spinning

scholarly journals Facile Characterization of Polymer-Supported Reagents Using Cross Polarization Magic Angle Spinning Method in Solid State 13C-NMR

2004 ◽  
Vol 52 (7) ◽  
pp. 864-865
Author(s):  
Kazuaki Shikii ◽  
Hiroko Seki ◽  
Kentaro Yamaguchi ◽  
Wannaporn Disadee ◽  
Toshiko Watanabe ◽  
...  
Keyword(s):  
Solid State ◽  
13C Nmr ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Polarization ◽  
Polymer Supported ◽  
Angle Spinning ◽  
Solid State 13C Nmr
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