We report on radical polarization and optically-driven liquid DNP with nitroxide radicals functionalized by photoexcitable fullerene derivatives. Pulse laser excitation of the fullerene moiety leads to a transient nitroxide radical polarization that is one order of magnitude larger than at Boltzmann equilibrium. Life time of radical polarization increases with size of the fullerene derivative and correlates with the electronic spin lattice relaxation time T1e. Overhauser NMR signal enhancements of toluene solvent protons were observed under steady-state illumination, which replaced microwave irradiation.
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13C Dynamic Nuclear Polarization Using Derivatives of TEMPO Free Radical #DNPNMR
From The DNP-NMR Blog:
13C Dynamic Nuclear Polarization Using Derivatives of TEMPO Free Radical #DNPNMR
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Niedbalski, P., et al., 13C Dynamic Nuclear Polarization Using Derivatives of TEMPO Free Radical. Appl. Magn. Reson., 2017. 48(9): p. 933-942.
https://doi.org/10.1007/s00723-017-0916-7
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11-06-2017 05:23 PM
Thermal annihilation of photo-induced radicals following dynamic nuclear polarization to produce transportable frozen hyperpolarized 13C-substrates
From The DNP-NMR Blog:
Thermal annihilation of photo-induced radicals following dynamic nuclear polarization to produce transportable frozen hyperpolarized 13C-substrates
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Capozzi, A., et al., Thermal annihilation of photo-induced radicals following dynamic nuclear polarization to produce transportable frozen hyperpolarized 13C-substrates. 2017. 8: p. 15757.
http://dx.doi.org/10.1038/ncomms15757
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07-28-2017 10:21 PM
19F Dynamic Nuclear Polarization and SEM in Suspensions Consisting of Fluorobenzene Derivatives and Asphaltene Extracted from MC-800 Liquid Asphalt #DNPNMR
From The DNP-NMR Blog:
19F Dynamic Nuclear Polarization and SEM in Suspensions Consisting of Fluorobenzene Derivatives and Asphaltene Extracted from MC-800 Liquid Asphalt #DNPNMR
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Kirimli, H.E. and H. Ovalioglu, 19F Dynamic Nuclear Polarization and SEM in Suspensions Consisting of Fluorobenzene Derivatives and Asphaltene Extracted from MC-800 Liquid Asphalt. Journal of Dispersion Science and Technology, 2014. 35(2): p. 255-264.
https://doi.org/10.1080/01932691.2013.767208
Liquid state dynamic nuclear polarization of ethanol at 3.4 T (95 GHz)
From The DNP-NMR Blog:
Liquid state dynamic nuclear polarization of ethanol at 3.4 T (95 GHz)
van der Heijden, G.H., A.P. Kentgens, and P.J. van Bentum, Liquid state dynamic nuclear polarization of ethanol at 3.4 T (95 GHz). Phys Chem Chem Phys, 2014. 16(18): p. 8493-502.
http://www.ncbi.nlm.nih.gov/pubmed/24668422
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06-27-2014 11:12 PM
Synthesis and evaluation of nitroxide-based oligoradicals for low-temperature dynamic nuclear polarization in solid state NMR
From The DNP-NMR Blog:
Synthesis and evaluation of nitroxide-based oligoradicals for low-temperature dynamic nuclear polarization in solid state NMR
Yau, W.-M., K.R. Thurber, and R. Tycko, Synthesis and evaluation of nitroxide-based oligoradicals for low-temperature dynamic nuclear polarization in solid state NMR. J. Magn. Reson., 2014(0).
http://www.sciencedirect.com/science/article/pii/S1090780714001372
Photo-induced radical polarization and liquid-state dynamic nuclear polarization with fullerene nitroxide derivatives
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