Band-selective 1H-13C cross-polarization in fast magic angle spinning solid-state NMR spectroscopy

J Am Chem Soc. 2008 Dec 24;130(51):17216-7. doi: 10.1021/ja805926d.

Abstract

A magic angle spinning (MAS) NMR technique to transfer polarization from protons to a specific set of the (13)C spins is introduced for the study of biomolecular samples in the solid-state. Ultrafast (>60 kHz) MAS and low irradiation rf fields are used to achieve band-selective Hartmann-Hahn cross-polarization (CP) between the whole proton bath and carbons whose resonances are close to the (13)C-transmitter offset. When compared to conventional, broadband (1)H-(13)C CP, the band-selective experiment can be established without any loss of sensitivity when polarizing the aliphatic signals of a protein sample, and with a significant gain when polarizing carbonyls. This scheme can be used as a building block in 2D (13)C-(13)C homonuclear correlation experiments to obtain a faster and more sensitive characterization of biological solids.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carbon / chemistry
  • Carbon Isotopes / chemistry*
  • Magnetic Resonance Spectroscopy / methods*
  • Models, Molecular
  • Molecular Conformation
  • Molecular Structure
  • Protons*
  • Temperature

Substances

  • Carbon Isotopes
  • Protons
  • Carbon