Solid-State NMR Characterization of Paramagnetic Bis(L-valinato)copper(II) Stereoisomers - Effect of Conformational Disorder and Molecular Mobility on13C and2H Fast Magic-Angle Spinning Spectra

2014 ◽  
Vol 2014 (21) ◽  
pp. 3330-3340 ◽  
Author(s):  
Gábor Szalontai ◽  
Jasmina Sabolović ◽  
Marijana Marković ◽  
and Szabolcs Balogh
Keyword(s):  
Solid State ◽  
Molecular Mobility ◽  
Solid State Nmr ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Conformational Disorder ◽  
Nmr Characterization ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning

Characterization of Polymer Compatibility by1H Dipolar Filter Solid-State NMR under Fast Magic Angle Spinning

2007 ◽  
Vol 40 (25) ◽  
pp. 9018-9025 ◽  
Author(s):  
Xiaoliang Wang ◽  
Qiang Gu ◽  
Qing Sun ◽  
Dongshan Zhou ◽  
Pingchuan Sun ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Polymer Compatibility ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning

Solid State NMR Characterization of Crosslinked Brominated Poly(Isobutylene-co-4-Methylstyrene)

1993 ◽  
Vol 66 (1) ◽  
pp. 109-120 ◽  
Author(s):  
R. R. Eckman ◽  
I. J. Gardner ◽  
H-C. Wang
Keyword(s):  
Solid State ◽  
Functional Groups ◽  
Solid State Nmr ◽  
Phenyl Ring ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Crosslinked Polymers ◽  
Nmr Characterization ◽  
Angle Spinning

Abstract The curing of brominated poly(isobutylene-co-4-methylstyrene) was studied using solid-state magic-angle-spinning NMR, a technique which is uniquely suited to investigate cured or crosslinked polymers. This brominated copolymer contains 4-bromomethylstyryl and 4-methylstyryl functional groups and was compression cured with pure ZnO. It was proposed that a precomplex is formed between zinc and the 4-bromomethylstyryl group, which generates a benzylic carbocationic intermediate. Crosslinking predominantly occurs by alkylation of the phenyl ring of another 4-bromomethylstyryl group by the benzylic intermediate. The ZnO brings the two bromides of these groups into proximity. The dependence of the cure chemistry on the concentration of 4-bromomethylstyryl functional groups was studied. Conversion of some 4-bromomethylstyryl groups to oxygenated species upon curing was also observed.

Very fast magic angle spinning 1H-14N 2D solid-state NMR: Sub-micro-liter sample data collection in a few minutes

2011 ◽  
Vol 208 (1) ◽  
pp. 44-48 ◽  
Author(s):  
Yusuke Nishiyama ◽  
Yuki Endo ◽  
Takahiro Nemoto ◽  
Hiroaki Utsumi ◽  
Kazuo Yamauchi ◽  
...  
Keyword(s):  
Solid State ◽  
Data Collection ◽  
Solid State Nmr ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Sample Data ◽  
Angle Spinning ◽  
Fast Magic 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.

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