β Scribed by Claudio Rossi; Nadia Marchettini; Simone Bastianoni; Alessandro Dongti
No coin nor oath required. For personal study only.
Selective, non-selective and biselective carbon spin-lattice relaxation measurements were determined in methyl-salicylate DMSO-d, solution. Tbe frequency dependence of biselective relaxation measurements of protonated aromiitic carbons showed the effects of J-scalar modulation. The dipolar contribution induced by asymmetric selective proton inversion of the spin population of a single satellite peak could be useful for investigating of the Shimizu-Fujiwara-Machor-Maclean relaxation rate. Analysis of the ratios is also proposed for the calculation of dipolar relaxation mechanism effidiency.
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## Abstract Protonβobserved carbonβedited (POCE) NMR spectroscopy is commonly used to measure ^13^C labeling with higher sensitivity compared to direct ^13^C NMR spectroscopy, at the expense of spectral resolution. For weakly coupled firstβorder spin systems, the multiplet signal at a specific prot