Tensor correlation

Tensor correlation methods refer to the selection of two anisotropic interactions so that the pattern of the 2D correlation spectrum can reveal the magnitudes and relative orientation of the two tensorial interactions. Below we will discuss many different SSNMR techniques suggested for the determination of peptide backbone... 

A direct determination of the backbone angle can be obtained by the tensor correlation of the and C -N +i) vectors. One possibility is to excite the... 

Tensor correlating the frictional force, F, opposing the motion of a particle in a viscous fluid and the velocity u of this particle relative to the fluid. 

An important application of spin diffusion in solid-state NMR is its use as a correlation mechanism in two-dimensional NMR spectra [13, 59]. The description of a two-dimensional tensor-correlation experiment using spin diffusion as a transport mechanism follows the general scheme for two-dimensional experiments (see Fig. 4.1) [7]. During the evolution time (tf), the polarization is labeled with the resonance frequency of spin k (fi ), during... 

Most recently, a double-quantum solid-state NMR technique has been reported [47]. This gives detailed structural information such as torsion angles for unoriented amorphous polymers including unoriented polypeptides with NMR tensor correlation in the labeled segments. This new solid-... 

Additional study of the influence of tensor correlations [34] shows that without tensor effects only a total of 10.5% depletion is obtained which should be regarded as resulting from pure short-range correlations. This is consistent with CBF calculations of the momentum distribution which show additional depletions of a similar size due to tensor correlations [46,31,47]. 

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