We report on radical polarization and optically-driven liquid DNP using nitroxide radicals functionalized by photoexcitable fullerene derivatives. Pulse laser excitation of the fullerene moiety leads to transient nitroxide radical polarization that is one order of magnitude larger than that at the Boltzmann equilibrium. The life time of the radical polarization increases with the size of the fullerene derivative and is correlated 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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Photo-induced radical polarization and liquid-state dynamic nuclear polarization with fullerene nitroxide derivatives
From The DNP-NMR Blog:
Photo-induced radical polarization and liquid-state dynamic nuclear polarization with fullerene nitroxide derivatives
DNP without microwave radiation? A very interesting approach.
Liu, G., et al., Photo-induced radical polarization and liquid-state dynamic nuclear polarization with fullerene nitroxide derivatives. Phys. Chem. Chem. Phys., 2017.
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12-04-2017 03:35 PM
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
Dynamic Nuclear Polarization/Solid-State NMR Spectroscopy of Membrane Polypeptides: Free-Radical Optimization for Matrix-Free Lipid Bilayer Samples #DNPNMR
From The DNP-NMR Blog:
Dynamic Nuclear Polarization/Solid-State NMR Spectroscopy of Membrane Polypeptides: Free-Radical Optimization for Matrix-Free Lipid Bilayer Samples #DNPNMR
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Salnikov, E.S., et al., Dynamic Nuclear Polarization/Solid-State NMR Spectroscopy of Membrane Polypeptides: Free-Radical Optimization for Matrix-Free Lipid Bilayer Samples. ChemPhysChem, 2017. 18(15): p. 2103-2113.
https://www.ncbi.nlm.nih.gov/pubmed/28574169
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09-25-2017 08:42 PM
Free Radical Imaging Using In Vivo Dynamic Nuclear Polarization-MRI #DNPNMR #ODNP
From The DNP-NMR Blog:
Free Radical Imaging Using In Vivo Dynamic Nuclear Polarization-MRI #DNPNMR #ODNP
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Utsumi, H. and F. Hyodo, Free Radical Imaging Using In Vivo Dynamic Nuclear Polarization-MRI. Methods Enzymol, 2015. 564: p. 553-71.
https://www.ncbi.nlm.nih.gov/pubmed/26477265
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08-18-2017 04:59 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
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01-09-2017 04:21 PM
Impact of Ho3+-doping on 13C dynamic nuclear polarization using trityl OX063 free radical #DNPNMR
From The DNP-NMR Blog:
Impact of Ho3+-doping on 13C dynamic nuclear polarization using trityl OX063 free radical #DNPNMR
Kiswandhi, A., et al., Impact of Ho3+-doping on 13C dynamic nuclear polarization using trityl OX063 free radical. Phys. Chem. Chem. Phys., 2016. 18(31): p. 21351-21359.
http://dx.doi.org/10.1039/C6CP03954E
Photo-induced radical polarization and liquid-state dynamic nuclear polarization using fullerene nitroxide derivatives #DNPNMR
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