Filtering of Spinning Sidebands in 1D MAS NMR Spectra
โ Scribed by A.K. Khitrin; Cecile Canlet; B.M. Fung
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 149 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0926-2040
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โฆ Synopsis
Spinning sidebands (SSBs) in the MAS NMR spectrum of a polycrystalline solid are related to the principal values of the chemical shift or quadrupole coupling tensors. At present, 2D methods are widely used to sort out the SSBs for each isotropic peak. Here a simple and efficient method for separating the SSBs in 1D MAS NMR spectra is described. It is based on finding the optimal spinning rate with a mathematical algorithm and subsequently treating the spectra with filtering functions.
๐ SIMILAR VOLUMES
Complex spinning sidebands are observed in magic-angle-spinning (MAS) NMR spectra arising from isolated tightly J-coupled spin pairs under slow spinning conditions. Such spinning sidebands are sensitive to the magnitude and relative orientation of the chemical-shift tensors, the dipolar-coupling ten
The presence of spinning sidebands can severely compromise pression will not be used, the first criterion is satisfied. the detection of low molarity analytes. Spinning sidebands have Modern NMR spectrometers, appropriately configured, traditionally been minimized by improving the magnetic field hoh
An analytical approach based on the average Hamiltonian theory is proposed for efficient calculation of the MAS NMR spectra of a dipolar-coupled homonuclear spin-(1/2) pair. For this purpose a superoperator formalism is developed which allows one to describe the spectra over a broad span of sample s
A pulse scheme for phase sensitive detection of two-dimensional (2D) homonuclear correlation magic angle spinning (MAS) NMR spectra is proposed. This scheme combines the time proportional phase increment phase cycling scheme and the time reversal 2D MAS experiment. This approach enables the direct d
Possibilities and limitations of iterative lineshape fitting procedures of MAS NMR spectra of isolated homonuclear spin pairs, aiming at determination of magnitudes and orientations of the various interaction tensors, are explored. Requirements regarding experimental MAS NMR spectra as well as simul