Day, Iain J., Mitchell, John C. ORCID: https://orcid.org/0000-0003-2945-3292, Snowden, Martin J. ORCID: https://orcid.org/0000-0002-1087-2692 and Davis, Adrian L. (2007) Applications of DNP-NMR for the measurement of heteronuclear T1 relaxation times. Journal of Magnetic Resonance, 187 (2). pp. 216-224. ISSN 1090-7807 (doi:10.1016/j.jmr.2007.04.015)

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Abstract

Measurement of heteronuclear spin-lattice relaxation times is hampered by both low natural abundance and low detection sensitivity. Combined with typically long relaxation times, this results in extended acquisition times which often renders the experiment impractical. Recently a variant of dynamic nuclear polarisation has been demonstrated in which enhanced nuclear spin polarisation, generated in the cryo-solid state, is transferred to the liquid state for detection. Combining this approach with small flip angle pulse trains, similar to the FLASH-T(1) imaging sequence, allows the rapid determination of spin-lattice relaxation times. In this paper we explore this method and its application to the measurement of T(1) for both carbon-13 and nitrogen-15 at natural abundance. The effects of RF inhomogeneity and the influence of proton decoupling in the context of this experiment are also investigated.

Item Type:	Article
Uncontrolled Keywords:	dynamic nuclear polarisation, spin-lattice relaxation, heteronuclear
Subjects:	Q Science > QC Physics
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > School of Science (SCI)
Related URLs:	Publisher Organisation Organisation
Last Modified:	16 Apr 2020 13:26
URI:	http://gala.gre.ac.uk/id/eprint/2695

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