Construction and 13 C hyperpolarization efficiency of a 180 GHz dissolution dynamic nuclear polarization system
نویسندگان
چکیده
منابع مشابه
Hyperpolarization of nitrogen-15 nuclei by cross polarization and dissolution dynamic nuclear polarization.
Dynamic Nuclear Polarization (DNP) is often achieved by the direct transfer of polarization from electrons to nuclei such as 13C, induced by microwave saturation of the wings of narrow EPR lines of radicals like trityl. In the indirect approach on the other hand, DNP is used to transfer the polarization from the electrons of radicals such as nitroxides that have broad EPR lines to nuclear spins...
متن کاملOptimizing dissolution dynamic nuclear polarization.
This article is a short review of some of our recent developments in dissolution dynamic nuclear polarization (d-DNP). We present the basic principles of d-DNP, and motivate our choice to step away from conventional approaches. We then introduce a modified d-DNP recipe that can be summed up as follows. (i) Using broad line polarizing agents to efficiently polarize 1H spins. (ii) Increasing the ...
متن کاملCross-polarization for dissolution dynamic nuclear polarization.
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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چکیده ندارد.
15 صفحه اولA 250 GHz gyrotron with a 3 GHz tuning bandwidth for dynamic nuclear polarization.
We describe the design and implementation of a novel tunable 250 GHz gyrotron oscillator with >10 W output power over most of a 3 GHz band and >35 W peak power. The tuning bandwidth and power are sufficient to generate a >1 MHz nutation frequency across the entire nitroxide EPR lineshape for cross effect DNP, as well as to excite solid effect transitions utilizing other radicals, without the ne...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Chemistry
سال: 2017
ISSN: 0749-1581,1097-458X
DOI: 10.1002/mrc.4597