Enhanced 1H-X D-HMQC performance through improved 1H homonuclear decoupling
- Ames Lab., Ames, IA (United States)
- Ames Lab. and Iowa State Univ., Ames, IA (United States)
The sensitivity of solid-state NMR experiments that utilize 1H zero-quantum heteronuclear dipolar recoupling, such as D-HMQC, is compromised by poor homonuclear decoupling. This leads to a rapid decay of recoupled magnetization and an inefficient recoupling of long-range dipolar interactions, especially for nuclides with low gyromagnetic ratios. We investigated the use, in symmetry-based 1H heteronuclear recoupling sequences, of a basic R element that was principally designed for efficient homonuclear decoupling. By shortening the time required to suppress the effects of homonuclear dipolar interactions to the duration of a single inversion pulse, spin diffusion was effectively quenched and long-lived recoupled coherence lifetimes could be obtained. Furthermore we show, both theoretically and experimentally, that these modified sequences can yield considerable sensitivity improvements over the current state-of-the-art methods and applied them to the indirect detection of 89Y in a metal-organic framework.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 1494939
- Alternate ID(s):
- OSTI ID: 1547877
- Report Number(s):
- IS-J--9865
- Journal Information:
- Solid State Nuclear Magnetic Resonance, Journal Name: Solid State Nuclear Magnetic Resonance Journal Issue: C Vol. 98; ISSN 0926-2040
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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