Frequency-Swept Integrated and Stretched Solid Effect Dynamic Nuclear Polarization

Overview

Journal J Phys Chem Lett

Publisher American Chemical Society

Specialty Chemistry

Date 2018 May 15

PMID 29756781

Citations 12

Authors

T V Can

J E McKay

R T Weber

C Yang

T Dubroca

J van Tol

S Hill

R G Griffin

Affiliations

Soon will be listed here.

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 (SE). 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 SE and ∼50 for the ISE. The results successfully demonstrate the viability of the FS-ISE and SE 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.

Citing Articles

Characterization of dielectric properties and their impact on MAS-DNP NMR applications.

Scott F, Dubroca T, Schurko R, Hill S, Long J, Mentink-Vigier F J Magn Reson. 2024; 365:107742.

PMID: 39116460 PMC: 11822944. DOI: 10.1016/j.jmr.2024.107742.

Large cross-effect dynamic nuclear polarisation enhancements with kilowatt inverting chirped pulses at 94 GHz.

Zhao Y, El Mkami H, Hunter R, Casano G, Ouari O, Smith G Commun Chem. 2023; 6(1):171.

PMID: 37607991 PMC: 10444895. DOI: 10.1038/s42004-023-00963-w.

Diamond rotors.

Golota N, Fredin Z, Banks D, Preiss D, Bahri S, Patil P J Magn Reson. 2023; 352:107475.

PMID: 37224586 PMC: 10504678. DOI: 10.1016/j.jmr.2023.107475.

Large Room Temperature Bulk DNP of C via P1 Centers in Diamond.

Shimon D, Cantwell K, Joseph L, Williams E, Peng Z, Takahashi S J Phys Chem C Nanomater Interfaces. 2022; 126(41):17777-17787.

PMID: 36304670 PMC: 9589901. DOI: 10.1021/acs.jpcc.2c06145.

Integrated, Stretched, and Adiabatic Solid Effects.

Quan Y, Steiner J, Ouyang Y, Tan K, Wenckebach W, Hautle P J Phys Chem Lett. 2022; 13(25):5751-5757.

PMID: 35714050 PMC: 9938721. DOI: 10.1021/acs.jpclett.2c01147.

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