Analysis of carbon-13 longitudinal relaxation times and nuclear overhauser enhancements in alkyl chains

✍ Scribed by D. Canet; J. Brondeau; H. Nery; J.P. Marchal

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 431 KB
• Volume: 72
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(80)80270-3

✦ Synopsis

A slmplc procedure IS proposed \h hlch yields. from carbon-l 3 longltudmal relavatlon times and nuclear Overhauser enhanccmcnts. Information concernmg the local moblllty of a gwzn CH vector III an alhyl cham. Tb~s method is based on the defimt:on of an eifcctlre rotatlon 3x1s related to internal motions and mahes use of Wocssner's equations. It yields a correlatmn tlmc TR characterlstlc of rhc overall rcorwntatlon. In addmon, for each carbon C, a correlation time rC , associated aith the fast motion of the C, H vector, and an angle 0, bctwccn Cl H and an efiectwe rotation axis, are dctermukd. The effect of cross-corrclat1on spectral dcnsltles IS ducussed This model 1s used for analysmg relaxation data of decylammomurn chloride muzelles It 1s further cheched by mtcrprctmp experImenta results at two different observation frequencies