Challenges and Advances in the Application of Dynamic Nuclear Polarization to Liquid-State NMR Spectroscopy.

Challenges and Advances in the Application of Dynamic Nuclear Polarization to Liquid-State NMR Spectroscopy.
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DOI:
10.1021/acs.jpcb.0c10937
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发表时间:
2021-05-27
影响因子:
3.3
通讯作者:
Szalai, Veronika
Szalai, Veronika
中科院分区:
化学3区
文献类型:
--
作者:
Abhyankar, Nandita;Szalai, Veronika

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Nuclear magnetic resonance (NMR) spectroscopy is a powerful method to study structure and dynamics of materials. The inherently low sensitivity of NMR spectroscopy is a consequence of low spin polarization. Hyperpolarization of a spin ensemble is defined as a population difference between spin states that far exceeds what is expected from the Boltzmann distribution for a given temperature. Dynamic nuclear polarization (DNP) can overcome the relatively low sensitivity of NMR spectroscopy by using a paramagnetic matrix to hyperpolarize a nuclear spin ensemble. Application of DNP NMR can result in sensitivity gains of up to four orders of magnitude compared to NMR without DNP. Although DNP NMR is now more routinely available for solid-state NMR spectroscopy, it has not been exploited to the same degree for liquid-state samples. This review will consider challenges and advances in the application of DNP NMR to liquid-state samples. The review is organized into four sections: (i) mechanisms of DNP NMR relevant to hyperpolarization of liquid samples; (ii) applications of liquid-state DNP NMR; (iii) available detection schemes for liquid-state samples; and (iv) instrumental challenges and outlook for liquid-state DNP NMR.
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