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Issue 35, 2015
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PRESTO polarization transfer to quadrupolar nuclei: implications for dynamic nuclear polarization

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Abstract

We show both experimentally and numerically on a series of model systems that in experiments involving transfer of magnetization from 1H to the quadrupolar nuclei under magic-angle-spinning (MAS), the PRESTO technique consistently outperforms traditionally used cross polarization (CP), affording more quantitative intensities, improved lineshapes, better overall sensitivity, and straightforward optimization. This advantage derives from the fact that PRESTO circumvents the convoluted and uncooperative spin dynamics during the CP transfer under MAS, by replacing the spin-locking of quadrupolar nuclei with a single central transition selective 90° pulse and using a symmetry-based recoupling sequence in the 1H channel. This is of particular importance in the context of dynamic nuclear polarization (DNP) NMR of quadrupolar nuclei, where the efficient transfer of enhanced 1H polarization is desired to obtain the highest sensitivity.

Graphical abstract: PRESTO polarization transfer to quadrupolar nuclei: implications for dynamic nuclear polarization

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Publication details

The article was received on 15 Jul 2015, accepted on 04 Aug 2015 and first published on 04 Aug 2015


Article type: Paper
DOI: 10.1039/C5CP04145G
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Citation: Phys. Chem. Chem. Phys., 2015,17, 22616-22622

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    PRESTO polarization transfer to quadrupolar nuclei: implications for dynamic nuclear polarization

    F. A. Perras, T. Kobayashi and M. Pruski, Phys. Chem. Chem. Phys., 2015, 17, 22616
    DOI: 10.1039/C5CP04145G

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