Dynamic Nuclear Polarization of17O: Direct Polarization
نویسندگان
چکیده
منابع مشابه
Dynamic Nuclear Polarization of [superscript 17] O: Direct Polarization
Dynamic nuclear polarization of 17O was studied using four different polarizing agents – the biradical TOTAPOL, and the monoradicals trityl and SA-BDPA, as well as a mixture of the latter two. Field profiles, DNP mechanisms and enhancements were measured to better understand and optimize directly polarizing this low-gamma quadrupolar nucleus using both monoand bi-radical polarizing agents. Enha...
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Dynamic nuclear polarization (DNP) in combination with subsequent dissolution of the sample allows the detection of low-γ nuclei in the solution state with a signal gain of up to tens of thousand times compared to experiments starting from Boltzmann conditions. The long polarization build-up times of typically more than one hour are a drawback of this technique. The combination of dissolution D...
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The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. In a dynamic nuclear polarization (DNP) experiment, the large Boltzmann polarization of a paramagnetic polarizing agent is transferred to surrounding nuclei by microwave irradiation at the electron paramagnetic resonance (EPR) frequency.[1] The initial DNP experiments were perf...
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N M R emission and e n h a n c e d absorpt i on o f p roduc t s o f radical react ions ( C I D N P ) is e x p l a i n e d b y nuc lear spin d e p e n d e n t ad iabat i c transit ions be tween singlet a n d tr iplet states o f transient radical pairs. I n m a g n e t i c fields larger than a b o u t 1 k G o n l y S — To-transit ions c ont r ibute t o nuc lear polar izat ion. F r o m a k inet i ...
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ژورنال
عنوان ژورنال: The Journal of Physical Chemistry B
سال: 2013
ISSN: 1520-6106,1520-5207
DOI: 10.1021/jp408440z