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Solid-State 77 Se NMR of Organoselenium Compounds through Cross Polarization Magic Angle Spinning (CPMAS) Method
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Solid-State 77 Se NMR of Organoselenium Compounds through Cross Polarization Magic Angle Spinning (CPMAS) Method
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Journal Article
Solid-State 77 Se NMR of Organoselenium Compounds through Cross Polarization Magic Angle Spinning (CPMAS) Method
2017
Overview
Characterization of selenium states by
Se NMR is quite important to provide vital information for mechanism studies in organoselenium-catalyzed reactions. With the development of heterogeneous polymer-supported organoselenium catalysts, the solid state
Se NMR comes to the spotlight. It is necessary to figure out an advanced protocol that provides good quality spectra within limited time because solid state
Se NMR measurements are always time consuming due to the long relaxation time and the relatively low sensitivity. Studies on small molecules and several novel polymer-supported organoselenium materials in this article showed that cross polarization (CP) method with the assistance of magic angle spinning (MAS) was more efficient to get high quality spectra than the methods by using single pulse (SP) or high power
H decoupling (HPHD) combined with MAS. These results lead to a good understanding of the effect of the molecular structure, the heteronuclear coupling, the long-range ordering of the solid (crystal or amorphous), and the symmetry of
Se on quality of their spectra.
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