Work

High-Field Dynamic Nuclear Polarization with High-Spin Transition Metal Ions

Year: 2011

Type: article

Abstract: We report the dynamic nuclear polarization of (1)H spins in magic-angle-spinning spectra recorded at 5 T and 84 K via the solid effect using Mn(2+) and Gd(3+) complexes as polarizing agents. We show that the magnitude of the enhancements can be directly related to the effective line width of the central (m(S) = -1/2 → +1/2) EPR transition. Using a Gd(3+) complex with a narrow central transition EPR line width of 29 MHz, we observed a maximum enhancement of ∼13, which is comparable to previous results on the narrow-line-width trityl radical.

Source: Journal of the American Chemical Society

DOI: 10.1021/ja1109002

Authors: Björn Corzilius, Albert A. Smith, Alexander B. Barnes, Claudio Luchinat, Ivano Bertini, Robert G. Griffin

Institutions: Massachusetts Institute of Technology, University of Florence

Language: English

Topic: Advanced NMR Techniques and Applications

Subfield: Spectroscopy

Field: Chemistry

Domain: Physical Sciences

Open Access status: green

Funder: National Institute of Biomedical Imaging and Bioengineering

Awards: G1721210722, G3597886368, MIT/ Harvard Center for Magnetic Resonance, High Field DNP and EPR in Biological Systems