Investigation of the dipolar dephasing NMR on organic solids

Autor:	W. D. Hoffmann, D. Fenzke, J. Witt
Rok vydání:	1992
Předmět:	Condensed Matter::Quantum Gases Solid-state physics Durene Dephasing chemistry.chemical_element Protonation Atomic and Molecular Physics and Optics Dipole chemistry.chemical_compound Magnetization chemistry Heteronuclear molecule Chemical physics Computational chemistry Carbon
Zdroj:	Applied Magnetic Resonance. 3:151-163
ISSN:	1613-7507 0937-9347
DOI:	10.1007/bf03166786
Popis:	We present a method based on integro-differential equations describing the13C−1H dipolar dephasing behaviour of carbon magnetization which results from monoprotonated carbons, non-protonated carbons as well as rapidly rotating methyl groups. Good agreement with theoretical calculations and experiment is obtained in ammonium tartrate and durene. The frequently applied empirical methods for determination the ratio of protonated and non-protonated carbons are analyzed. The dipolar dephasing time constants of non-protonated carbons vary substantially as a result, of variation in their heteronuclear second moments and thus in structure. Two different methods are performed for determination heteronuclear second moments from dipolar dephasing data.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5412b7ab2282a92d3145653449eabdfd https://doi.org/10.1007/bf03166786 Zobrazit plný text záznamu Full text from SpringerLink