Dynamic nuclear polarization of water by a nitroxide radical: rigorous treatment of the electron spin saturation and comparison with experiments at 9.2 Tesla
Dynamic nuclear polarization of water by a nitroxide radical: rigorous treatment of the electron spin saturation and comparison with experiments at 9.2 Tesla
And another great article from 2009 that I missed.
Sezer, D., et al., Dynamic nuclear polarization of water by a nitroxide radical: rigorous treatment of the electron spin saturation and comparison with experiments at 9.2 Tesla. Phys. Chem. Chem. Phys., 2009. 11(31): p. 6638-6653.
The interaction between nuclear and electronic spins is of interest for structural characterization of biomolecules and biomedical imaging based on nuclear magnetic resonance. The polarization of the nuclear spins can be increased significantly if the electron spin polarization is kept out of equilibrium. We employ semiclassical relaxation theory to analyze the electronic polarization of the two-spin system characteristic of nitroxide radicals. Atomistic molecular dynamics simulations of the nitroxide TEMPOL in water are performed to account for the effects of tumbling and spin-rotation coupling on the spin-spin and spin-lattice relaxation times. Concentration effects on the electron saturation are introduced by allowing for Heisenberg spin exchange between two nitroxides. Polarization enhancement profiles, calculated from the computed saturation, are directly compared with liquid-state dynamic nuclear polarization experiments conducted at 260 GHz/400 MHz. The contribution of the separate hyperfine lines to the saturation can be easily disentangled using the developed formalism.
Large Molecular Weight Nitroxide Biradicals Providing Efficient Dynamic Nuclear Polarization at Temperatures up to 200 K
From The DNP-NMR Blog:
Large Molecular Weight Nitroxide Biradicals Providing Efficient Dynamic Nuclear Polarization at Temperatures up to 200 K
Zagdoun, A., et al., Large Molecular Weight Nitroxide Biradicals Providing Efficient Dynamic Nuclear Polarization at Temperatures up to 200 K. J. Am. Chem. Soc., 2013. 135(34): p. 12790-12797.
http://dx.doi.org/10.1021/ja405813t
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09-25-2013 11:34 PM
Large Molecular Weight Nitroxide Biradicals Providing Effi-cient Dynamic Nuclear Polarization at Temperatures up to 200 Kelvin
From The DNP-NMR Blog:
Large Molecular Weight Nitroxide Biradicals Providing Effi-cient Dynamic Nuclear Polarization at Temperatures up to 200 Kelvin
Zagdoun, A., et al., Large Molecular Weight Nitroxide Biradicals Providing Efficient Dynamic Nuclear Polarization at Temperatures up to 200 K. J Am Chem Soc, 2013. 135(34): p. 12790-7.
http://www.ncbi.nlm.nih.gov/pubmed/23961876
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09-05-2013 01:07 PM
High-Field (13)C Dynamic Nuclear Polarization with a Radical Mixture
From the The DNP-NMR Blog:
High-Field (13)C Dynamic Nuclear Polarization with a Radical Mixture
Michaelis, V.K., et al., High-Field (13)C Dynamic Nuclear Polarization with a Radical Mixture. J Am Chem Soc, 2013.
http://www.ncbi.nlm.nih.gov/pubmed/23373472
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04-15-2013 08:52 AM
[NMR paper] Water proton spin saturation affects measured protein backbone 15N spin relaxation rates
From Mendeley Biomolecular NMR group:
Water proton spin saturation affects measured protein backbone 15N spin relaxation rates
Journal of Magnetic Resonance (2011). Volume: 213, Issue: 1. Pages: 151-157. Kang Chen, Nico Tjandra et al.
Published using Mendeley: The library management tool for researchers
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11-22-2012 11:49 AM
[NMR paper] Water proton spin saturation affects measured protein backbone 15N spin relaxation rates
From Mendeley Biomolecular NMR group:
Water proton spin saturation affects measured protein backbone 15N spin relaxation rates
Journal of Magnetic Resonance (2011). Volume: 213, Issue: 1. Pages: 151-157. Kang Chen, Nico Tjandra et al.
Published using Mendeley: The reference manager for researchers
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10-12-2012 09:58 AM
[NMR paper] Water proton spin saturation affects measured protein backbone 15N spin relaxation rates
From Mendeley Biomolecular NMR group:
Water proton spin saturation affects measured protein backbone 15N spin relaxation rates
Journal of Magnetic Resonance (2011). Volume: 213, Issue: 1. Pages: 151-157. Kang Chen, Nico Tjandra et al.
Published using Mendeley: The digital library for researchers
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08-24-2012 08:01 PM
Water proton spin saturation affects measured protein backboneN spin relaxation rates
Water proton spin saturation affects measured protein backboneN spin relaxation rates
Publication year: 2011
Source: Journal of Magnetic Resonance, Available online 1 October 2011</br>
Kang*Chen, Nico*Tjandra</br>
Protein backboneN NMR spin relaxation rates are useful in characterizing the protein dynamics and structures. To observe the protein nuclear-spin resonances a pulse sequence has to include a water suppression scheme. There are two commonly employed methods, saturating or dephasing the water spins with pulse field gradients and keeping them unperturbed with flip-back pulses....