期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 9, 期 18, 页码 5539-5547出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.8b01695
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资金
- NIH [DP2-GM119131]
- NSF-IDBR [CAREER DBI-1553577]
- Camille Dreyfus Teacher-Scholar Awards Program
Magic angle spinning (MAS) dynamic nuclear polarization (DNP) is widely used to increase nuclear magnetic resonance (NMR) signal intensity. Frequency-chirped microwaves yield superior control of electron spins and are expected to play a central role in the development of DNP MAS experiments. Time domain electron control with MAS has considerable promise to improve DNP performance at higher fields and temperatures. We have recently demonstrated that pulsed electron decoupling using frequency-chirped microwaves improves MAS DNP experiments by partially attenuating detrimental hyperfine interactions. The continued development of pulsed electron decoupling will enable a new suite of MAS DNP experiments that transfer polarization directly to observed spins. Time domain DNP transfers to nuclear spins in conjunction with pulsed electron decoupling is described as a viable avenue toward DNP-enhanced, high-resolution NMR spectroscopy over a range of temperatures from <6 to 320 K.
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