Indirect Coupling and Connectivity
作者： Anne Lesage
DOI: 10.1002/9780470034590.EMRSTM1012
关键词: J-coupling 、 Dipole 、 Magic angle spinning 、 Chemical coupling 、 Heteronuclear molecule 、 Chemical physics 、 Coherence (physics) 、 Coupling 、 Nuclear magnetic resonance 、 Homonuclear molecule 、 Chemistry
摘要: Solid-state NMR of rare nuclei such as carbon-13 has developed through the widespread use cross polarization (CP) and magic angle spinning (MAS), well introduction homo- or heteronuclear multidimensional correlation techniques based on dominant through-space dipolar interactions. Indirect scalar couplings, although smaller magnitude, are valuable probes direct proximities, their recently an essential component in assignment characterization process powdered solids. Homonuclear experiments which coherence transfers exclusively mediated by JCC couplings reviewed. Their applicability both crystalline disordered materials is discussed, along with possibility measuring homonuclear Correlation involving protons provide additional useful sources information. Through-bond JCH implemented for rigid solid compounds presented discussed terms sensitivity selectivity. Keywords: scalar couplings; INADEQUATE; INEPT; proton decoupling; through-bond connectivities; linewidths solids; indirect coupling; J coupling; heteronuclear coupling; homonuclear coupling; connectivities
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