Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 16, Issue 35, Pages 18781-18787Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cp02451f
Keywords
-
Funding
- DIP program from the German Research Council (DFG)
- Center for Biomolecular Magnetic Resonance (BMRZ), Frankfurt
- European Commission (Bio-NMR)
- COST Action [TD1103]
Ask authors/readers for more resources
Here we show how fast dynamics between radicals and solvent molecules in liquid solutions can be detected by comparison of coupling factors determined by nuclear magnetic relaxation dispersion (NMRD) measurements and dynamic nuclear polarization (DNP) enhancement measurements at high magnetic field (9.2 T). This is important for a theoretical understanding of the Overhauser DNP mechanism at high magnetic fields and thus for optimization of the DNP agent/target system for high resolution liquid state NMR applications. Mixtures of the solution of TEMPOL radicals in water, toluene, acetone and DMSO have been investigated. The results are compared to the classical hard-sphere model and molecular dynamic simulations. Our results clearly indicate that fast sub-ps dynamics, which are not related to classical rotational or translational motion of the molecules, significantly contribute to the Overhauser DNP mechanism at high magnetic fields.
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