Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 9, Issue 9, Pages 2175-2180Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.8b00751
Keywords
-
Categories
Funding
- National Science Foundation (NSF) [1505038, CHE-1665256]
- National Institute of Health (NIH) (NIBIB) [1R21EB022731]
- National Institute of Health (NIH) (NIGMS) [R01GM124310-01]
- Division Of Chemistry [1505038] Funding Source: National Science Foundation
- NATIONAL INSTITUTE OF BIOMEDICAL IMAGING AND BIOENGINEERING [R21EB022731] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM124310] Funding Source: NIH RePORTER
Ask authors/readers for more resources
The discovery of a truncated cross-effect (CE) in dynamic nuclear polarization (DNP) NMR that has the features of an Overhauser-effect DNP (OE-DNP) is reported here. The apparent OE-DNP, where minimal mu w power achieved optimum enhancement, was observed when doping Trityl-OX063 with a pyrroline nitroxide radical that possesses electron-withdrawing tetracarboxylate substituents (tetracarboxylate-ester-pyrroline or TCP) in vitrified water/glycerol at 6.9 T and at 3.3 to 85 K, in apparent contradiction to expectations. While the observations are fully consistent with OE-DNP, we discover that a truncated cross-effect (tCE) is the underlying mechanism, owing to TCP's shortened Tie. We take this observation as a guideline and demonstrate that a crossover from CE to tCE can be replicated by simulating the CE of a narrow-line (Trityl-OX063) and a broad-line (TCP) radical pair, with a significantly shortened Tie of the broad-line radical.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available