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001-es BibID:	BIBFORM006197
Első szerző:	Jin, Lan
Cím:	H-1-Detected IPAP DEPT-INADEQUATE and IPAP RINEPT-INADEQUATE for the measurement of long-range carbon-carbon coupling constants / Jin, L., Kover, K. E., Lenoir, M. R., Uhrin, D.
Dátum:	2008
Megjegyzések:	The sensitivity of cryoprobes, which are rapidly becoming available, have brought about the possibility of measurement of C-13, C-13 coupling constants at the natural abundance of C-13 using tens rather than hundreds of milligrams of compounds. This relatively recent development lays the foundation for a more routine use of the C-13, C-13 long-range coupling constants in the conformational analysis of molecules. We have designed novel H-1-detected INADEQUATE experiments optimized for long-range C-13, C-13 correlations and the measurement of long-range coupling constants. These experiments incorporate refocusing Of (1)J(CH) coupling constants prior to the formation of DQ coherences and H-1-decoupling during the long carbon-carbon evolution intervals. Such modifications significantly enhance their performance over H-1-detected INADEQUATE experiments currently in use for mapping the one-bond C-13, C-13 correlations. H-1 or C-13 polarization is used a starting point in long-range correlation H-1-detected IPAP DEPT-INADEQUATE or RINEPT-INADEQUATE experiments. These correlation experiments were modified yielding in-phase (IP) or antiphase (AP) C-13, C-13 doublets in F-1. Procedures were developed for their editing yielding accurate values of small C-13, C-13 coupling constants. The methods are illustrated using mono- and disaccharide samples and compared with related 13 C-detected experiments by means of the measurement of interglycosidic C-13, C-13 coupling constants of a disaccharide.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Journal of Magnetic Resonance. - 190 : 2 (2008), p. 171-182. -
További szerzők:	Kövér Katalin, E. (1956-2023) (vegyész) Lenoir, Marc R. Uhrín, Dušan
Internet cím:	elektronikus változat elektronikus változat
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