Solid State Nuclear Magnetic Resonance NMR Spectroscopy

Crosslinked polymer networks formed from multifunctional acrylates are completely insoluble. Consequently, solid-state nuclear magnetic resonance (NMR) spectroscopy becomes an attractive method to determine the degree of crosslinking of such polymers (1-4). Solid-state NMR spectroscopy has been used to study the homopolymerization kinetics of various diacrylates and to distinguish between constrained and unconstrained, or unreacted double bonds in polymers (5,6). Solid-state NMR techniques can also be used to determine the domain sizes of different polymer phases and to determine the presence of microgels within a poly multiacrylate sample (7). The results of solid-state NMR experiments have also been correlated to dynamic mechanical analysis measurements of the glass transition (1,8,9) of various polydiacrylates. 

One technique that is becoming increasingly important for the characterization of materials is that of solid-state nuclear magnetic resonance (NMR) spectroscopy, and the application of this methodology to topics of pharmaceutical interest has been amply demonstrated.The NMR spectra of polymorphs or solvatomorphs often contains non-equivalent resonance peaks for analogous nuclei since the intimate details of the molecular environments associated with differing crystal structures can lead to perturbations in nuclear resonance energies. 

Differentiate hydride species present in doped hydride by solid state nuclear magnetic resonance (NMR) spectroscopy. 

Seidel K, Andronesi OC, Krebs J et al (2008) Structural characterization of Ca2-I—ATPase-bound phospholamban in lipid bilayers by solid-state nuclear magnetic resonance (NMR) spectroscopy. Biochemistry (Mosc) 47 4369-4376... 

In the present paper, differences between isotactic PMEPL and the stereocomplex are examined by solid state nuclear magnetic resonance (NMR) spectroscopy. These studies reveal new polymorphic behaviour of the isotactic polymer and differences in crystal structure which depend on tacticity. Crystal structures of the various polymorphs were also determined by electron and x-ray diffraction studies. 

Despite the importance of solid-state nuclear magnetic resonance (NMR) spectroscopy for the characterization of solid catalysts, in situ studies related to photocatalysts are rare. Mills and O Rourke [59] monitored the selective photooxidation of toluene by in situ NMR using an NMR tube as the photoreactor. A Ti02 precursor paste was prepared by hydrolysis of titanium propoxide and following treatment at 228 °C. The obtained anatase-type titania was mixed with poly(vinyl alcohol). The obtained paste was coated on the walls of the NMR tube, rotated over night and calcined. In parallel, batch experiments were carried out. The reaction mixture containing the catalyst was directly placed into the tube, which was irradiated outside the spectrometer and then inserted into the NMR spectrometer. 

Fourier Transform Infrared (FTIR) and solid-state Nuclear Magnetic Resonance (NMR) spectroscopy have been used to complement water uptake or contact angle studies. Both methods give direct structural information about the chemical bonds present in an aerogel sample. The differences in stmcture of hydrophobic and hydrophilic aerogels result in observed differences in their FTIR and NMR spectra. 

Using solid state nuclear magnetic resonance (NMR) spectroscopy, Bao et al. [20] found little evidence for this when two types of wood (Aspen and Southern Pine) were treated with polymerised diphenylmethane diisocyanate. However, evidence for such linkages was obtained by Zhou and Frazier [21], but now using NMR spectroscopy with both and nuclei. 

Compilation of Experimental Reports of Solid-State Nuclear Magnetic Resonance (NMR) Spectroscopy Applied to the Study of Carbon Materials Involving Nuclides Other Than C... 

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