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This content will become publicly available on August 12, 2018

Title: Improved strategies for DNP-enhanced 2D 1 H-X heteronuclear correlation spectroscopy of surfaces

We demonstrate that dynamic nuclear polarization (DNP)-enhanced 1H-X heteronuclear correlation (HETCOR) measurements of hydrogen-rich surface species are better accomplished by using proton-free solvents. This approach notably prevents HETCOR spectra from being obfuscated by the solvent-derived signals otherwise present in DNP measurements. Additionally, in the hydrogen-rich materials studied here, which included functionalized mesoporous silica nanoparticles and metal organic frameworks, the use of proton-free solvents afforded higher sensitivity gains than the commonly used solvents containing protons. Here, we also explored the possibility of using a solvent-free sample formulation and the feasibility of indirect detection in DNP-enhanced HETCOR experiments.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [3]
  1. Ames Lab., Ames, IA (United States)
  2. Iowa State Univ., Ames, IA (United States)
  3. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Report Number(s):
IS-J-9361
Journal ID: ISSN 0926-2040; PII: S0926204017300644
Grant/Contract Number:
AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Solid State Nuclear Magnetic Resonance
Additional Journal Information:
Journal Volume: 87; Journal Issue: C; Journal ID: ISSN 0926-2040
Publisher:
Elsevier
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; Dynamic nuclear polarization; Solid-state NMR; Heteronuclear correlation; Catalysis; Surface science
OSTI Identifier:
1399263