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Applications of DNP-NMR for the measurement of heteronuclear T1 relaxation times

journal contribution
posted on 2023-06-08, 07:42 authored by Iain Day, John C Mitchell, Martin J Snowden, Adrian L Davis
Measurement of heteronuclear spinlattice 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-T1 imaging sequence, allows the rapid determination of spinlattice relaxation times. In this paper we explore this method and its application to the measurement of T1 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.

History

Publication status

  • Published

Journal

Journal of Magnetic Resonance

ISSN

1090-7807

Publisher

Elsevier

Issue

2

Volume

187

Page range

216-224

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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