In situ temperature-jump dynamic nuclear polarization: enhanced sensitivity in two dimensional 13C-13C correlation spectroscopy in solution.

Autor: Joo CG; Francis Bitter Magnet Laboratory and Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA., Casey A, Turner CJ, Griffin RG
Jazyk: angličtina
Zdroj: Journal of the American Chemical Society [J Am Chem Soc] 2009 Jan 14; Vol. 131 (1), pp. 12-3.
DOI: 10.1021/ja805521y
Abstrakt: Dynamic nuclear polarization is combined with temperature-jump methods to develop a new 2D 13C-13C NMR experiment that yields a factor of 100-170 increase in sensitivity. The polaization step is performed at 100 K, and the sample is subsequently melted with a 10.6 microm laser pulse to yield a sample with highly polarized 13C spins. 13C detected 2D 13C-13C spectroscopy is performed in the usual manner.
Databáze: MEDLINE