نتایج جستجو برای: dynamic nuclear polarisation

تعداد نتایج: 641526  

Journal: :Biological chemistry 2001
J Matysik E Schulten Alia P Gast J Raap J Lugtenburg A J Hoff H J de Groot

Photochemically induced dynamic nuclear polarisation (photo-CIDNP) in intact bacterial reaction centres has been observed by 13C-solid state NMR under continuous illumination with white light. Strong intensity enhancement of 13C NMR signals of the aromatic rings allows probing the electronic ground state of the two BChl cofactors of the special pair at the molecular scale with atomic selectivit...

Journal: :Chemical communications 2017
Nick J Brownbill David Gajan Anne Lesage Lyndon Emsley Frédéric Blanc

We report 17O dynamic nuclear polarisation (DNP) enhanced solid-state NMR experiments at 18.8 T. Several formulations were investigated on the Mg(OH)2 compound. A signal enhancement factor of 17 could be obtained when the solid particles were incorporated into a glassy o-terphenyl matrix doped with BDPA using the Overhauser polarisation transfer scheme whilst the cross effect mechanism enabled ...

2008
V. Tripathi A. C. H. Cheung

We propose a new method for dynamic nuclear polarisation in a quasi one-dimensional quantum wire utilising the spin-orbit interaction, the hyperfine interaction, and a finite sourcedrain potential difference. In contrast with current methods, our scheme does not rely on external magnetic or optical sources which makes independent control of closely placed devices much more feasible. Using this ...

Journal: :Chemical Communications 2021

Using a fast-injection system for dissolution dynamic nuclear polarisation, 1 H– H 2D NMR spectra tailored the analysis of mixtures are obtained in single-scan with enhanced sensitivity.

Journal: :Magnetic resonance 2022

Abstract. Polarisation transfer schemes and indirect detection are central to magnetic resonance. Using the trityl radical OX063 a pulse electron paramagnetic resonance spectrometer operating in Q-band (35 GHz, 1.2 T), we show here that it is possible use pulsed dynamic nuclear polarisation (DNP) from electrons protons back. The latter achieved by first saturating then simply using reverse DNP ...

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