Proton chemical shift anisotropy: detection of cross correlation with dipole-dipole interactions by double-quantum filtered two-dimensional NMR exchange spectroscopy
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Cross-correlated fluctuations of isotropic chem. shifts can provide evidence for slow motions in biomols. Slow side-chain dynamics have been investigated in 15N and 13C enriched ubiquitin by monitoring the relaxation of Ca-Cb two-spin coherences (Frueh et ...
Cross-correlated fluctuations of isotropic chem. shifts can provide evidence for slow motions in biomols. Slow side-chain dynamics have been investigated in 15N and 13C enriched ubiquitin by monitoring the relaxation of Ca-Cb two-spin coherences (Frueh et ...
The experimental lineshapes of the carboxyl and methyl carbon resonances of fully C-13 enriched L-Alanine are studied in detail at different MAS frequencies and decoupling field strengths. Complex lineshapes at intermediate spinning speeds were explained b ...
A new sequence is described to measure the cross-correlation rates between the chem. shift anisotropy of the carbonyl carbon-13 nucleus and the dipole-dipole interaction between this carbonyl and the alpha-proton in proteins. The sequence is based on the s ...
We show how high-resolution NMR spectra can be obtained for solids for which the spectra are normally broadened due to structural disorder. The method relies on correlations in the chemical shifts between pairs of coupled spins. It is found experimentally ...
The reaction of [Ta(=CHtBu)(CH(2)tBu)(3)] or [CpTa(CH3)(4)] with a silica partially dehydroxylated at 700 degreesC gives the corresponding monosiloxy surface complexes [(=SIO)Ta(=CHtBu)(CH(2)tBu)(2)] and [(=SiO)Ta(CH3)(3)Cp] by eliminating a a-bonded lig ...
In this paper some effects of dynamical coupling between two interaction-carrying vectors on the internal auto- and cross-correlation functions are investigated in the limit of small amplitude motions. A linearized Langevin approach allows the derivation o ...
Exchange transferred effects in soln.-state NMR expts. allow one to det. the conformation of ligands that are weakly bound to macromols. Exchange-transferred nuclear Overhauser effect spectroscopy (TR-NOESY) provides information about internuclear distance ...
A new two-dimensional solid-state NMR experiment, which correlates slow and fast chemical shift anisotropy sideband patterns is proposed. The experiment, dubbed ROSES, is performed under fast magic-angle spinning and leads to an isotropic spectrum in the d ...
Two sets of cross-correlated relaxation rates involving chem. shift anisotropy and dipolar interactions have been measured in an RNA kissing complex. In one case, both the CSA and dipolar interaction tensors are located on the same nucleotide base and are ...
