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Frequency-Swept Integrated and Stretched Solid Effect Dynamic Nuclear Polarization
- Source :
- J Phys Chem Lett
- Publication Year :
- 2018
-
Abstract
- We investigate a new time domain approach to dynamic nuclear polarization (DNP), the frequency-swept integrated solid effect (FS-ISE), utilizing a high power, broadband 94 GHz (3.35 T) pulse EPR spectrometer. The bandwidth of the spectrometer enabled measurement of the DNP Zeeman frequency/field profile that revealed two dominant polarization mechanisms, the expected ISE, and a recently observed mechanism, the stretched solid effect (S(2)E). At 94 GHz, despite the limitations in the microwave chirp pulse length (10 μs) and the repetition rate (2 kHz), we obtained signal enhancements up to ~70 for the S(2)E and ~50 for the ISE. The results successfully demonstrate the viability of the FS-ISE and S(2)E DNP at a frequency 10 times higher than previous studies. Our results also suggest that these approaches are candidates for implementation at higher magnetic fields.
- Subjects :
- Zeeman effect
Materials science
Spectrometer
010405 organic chemistry
Pulsed EPR
business.industry
Bandwidth (signal processing)
010402 general chemistry
Polarization (waves)
01 natural sciences
Article
0104 chemical sciences
Magnetic field
symbols.namesake
symbols
Optoelectronics
General Materials Science
Time domain
Physical and Theoretical Chemistry
business
Microwave
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- J Phys Chem Lett
- Accession number :
- edsair.doi.dedup.....5027ce1d81cd6b5a2503e838ef6ad0f7