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Motional narrowing of 13C dipolar magic-angle-spinning nuclear magnetic resonance spectra

✍ Scribed by Hiroshi Ohe; Atsushi Kubo; Motomi Katada; Hirotoshi Sano

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 614 KB
Volume: 172
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(90)85404-z

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✦ Synopsis

The effects of molecular motions on the dipolar coupled j3C magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) spectra of alkane-urea inclusion compounds and bis(ethylammonium) hexachlorostannate were investigated. The contact time dependences of "C cross-polarization (CP) MAS NMR spectra were measured for the tridecane-urea inclusion compound at the Hartman-Hahn condition and at the off-Hartman-Hahn condition. Rotational echoes were observed at a multiple of the rotational periods both in the dipolar dephasing experiments and the CP experiments. These rotational echo shapes were analyzed by the presently proposed theory.

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