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Title

Optimized polarization build-up times in dissolution DNP-NMR using a benzyl amino derivative of BDPA

AuthorsMuñoz Gómez, José L ; Monteagudo, Eva; Lloveras, Vega ; Parella, Teodor; Veciana, Jaume ; Vidal Gancedo, José
KeywordsDynamic nuclear-polarization
Magnetic-resonance
Enhanced NMR
Spectroscopy
Issue Date22-Feb-2016
PublisherRoyal Society of Chemistry (UK)
CitationRSC Advances 6(32): 27077-27082 (2016)
AbstractThe synthesis of two novel BDPA-like radicals, a benzyl amino (BAm-BDPA, 7) and a cyano (CN-BDPA, 5) derivative, is reported and their behaviour as polarizing agents for fast dissolution Dynamic Nuclear Polarization (DNP) is evaluated. The radical 7 is a promising candidate for DNP studies since it is soluble in neat [1-13C]pyruvic acid (PA), and therefore the use of an additional glassing agent for sample homogeneity is avoided. In addition, a 60 mM sample of 7 offers optimum 13C NMR signal enhancements using fairly short polarization times (about 1800 s). It is shown that DNP-NMR measurements using 7 can be performed much more efficiently in terms of the signal enhancement per polarization build-up time unit than when using the reference OX63 or BDPA radicals. These enhanced features are translated to a substantial reduction of polarization times that represents an optimum temporary use of the DNP polarizer and allow economized liquid helium consumption.
Publisher version (URL)http://dx.doi.org/10.1039/C6RA00635C
URIhttp://hdl.handle.net/10261/148936
DOI10.1039/C6RA00635C
ISSN2046-2069
Appears in Collections:(ICMAB) Artículos
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