Line-splitting and broadening effects from F-19 in the C-13 NMR of liquid crystals and solids

Antonioli, G.; McMillan, D.E.; Hodgkinson, P.

Abstract

The NMR resonances of C-13 spins in proximity to F-19 are often unusually broad, degrading resolution and limiting the ability to quantify the C-F interactions. We observe line-splittings and selective broadenings in a liquid crystal sample that strongly depend on the H-1 decoupling. We propose a simple rationalisation that successfully reproduces the experimental behaviour, and find that suitably adapted decoupling sequences effectively eliminate the line-broadenings. Experiments on solid samples show similar variations with decoupling sequence, and the same effects may be general to H-X-Y systems. (C) 2001 Elsevier Science B.V. All rights reserved.

Citation

Antonioli, G., McMillan, D., & Hodgkinson, P. (2001). Line-splitting and broadening effects from F-19 in the C-13 NMR of liquid crystals and solids. Chemical Physics Letters, 344(1-2), 68-74

• Journal Article Type: Article
• Publication Date: 2001-08
• Journal: Chemical Physics Letters
• Print ISSN: 0009-2614
• Electronic ISSN: 1873-4448
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 344
• Issue: 1-2
• Pages: 68-74
• Public URL: https://durham-repository.worktribe.com/output/1580456
• Publisher URL: <Go to ISI>://000170619200011