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A cryogen-free, semi-automated apparatus for bullet-dynamic nuclear polarization with improved resolution

Kouřil, Karel; Gramberg, Michel; Jurkutat, Michael; Kouřilová, Hana; Meier, Benno ORCID iD icon


In dissolution-dynamic nuclear polarization, a hyperpolarized solid is dissolved with a jet of hot solvent. The solution is then transferred to a secondary magnet, where spectra can be recorded with improved sensitivity. In bullet-dynamic nuclear polarization this order is reversed. Pressurized gas is used to rapidly transfer the hyperpolarized solid to the secondary magnet, and the hyperpolarized solid is dissolved only upon arrival. A potential advantage of this approach is that it may avoid excessive dilution and the associated signal loss, in particular for small sample quantities. Previously, we have shown that liquid-state NMR spectra with polarization levels of up to 30 % may be recorded within less than 1 s after the departure of the hyperpolarized solid from the polarizing magnet. The resolution of the recorded spectra however was limited. The system consumed significant amounts of liquid helium, and substantial manual work was required in between experiments to prepare for the next shot. Here, we present a new bullet-DNP (dynamic nuclear polarization) system that addresses these limitations.

Verlagsausgabe §
DOI: 10.5445/IR/1000141428
Veröffentlicht am 21.12.2021
DOI: 10.5194/mr-2-815-2021
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Biologische Grenzflächen (IBG)
Institut für Organische Chemie (IOC)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2699-0016
KITopen-ID: 1000141428
HGF-Programm 43.35.01 (POF IV, LK 01) Platform for Correlative, In Situ & Operando Charakterizat.
Erschienen in Magnetic resonance
Verlag Copernicus Publications
Band 2
Heft 2
Seiten 815–825
Vorab online veröffentlicht am 11.11.2021
Nachgewiesen in Dimensions
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