Chemical Shift Standards in High-Resolution Solid-State NMR (1)13C,29Si, and1H Nuclei
نویسندگان
چکیده
منابع مشابه
Comparison of high-resolution solid-state NMR MQMAS and STMAS methods for half-integer quadrupolar nuclei.
Several different amplitude-modulated two-dimensional high-resolution methods, based on MQMAS and STMAS, are compared. They include 3QMAS, 5QMAS, DQ-STMAS, and DQF-STMAS experiments. A new method, called t1-split-STMAS, is also proposed for spin-3/2 nuclei. The comparison is performed in terms of isotropic resolution and spectral-width, efficiency, and sensitivity to magic-angle offset and spin...
متن کاملResidual dipolar couplings between quadrupolar nuclei in high resolution solid state NMR: Description and observations in the high-field limit
Nonsecular dipolar couplings between spin2 nuclei that are in close proximity to quadrupolar spins have been extensively documented in solid state nuclear magnetic resonance ~NMR!, particularly when involving directly bonded S5C, I5N spin pairs. These couplings arise due to the quadrupole-induced tilting of I’s nuclear spin quantization axes, and their most notable characteristic is that they c...
متن کاملHydrogen-bonding Effect on 15n Nmr Chemical Shifts of the Glycine Residue of Oligopeptides in the Solid State as Studied by High-resolution Solid-state Nmr Spectroscopy
19 HIgh-resolutIOn I5N NMR spectra of a vanety ofsohd ohgopeptIdes (X-Gly-Gly) contammg glycme resIdues have been measured, of whIch the crystal structures had already been determmed by X-ray dIffractIOn The expenmental '5N chemIcal shIfts of the glycme reSIdues were plotted agamst the N"'O hydrogen bond length and the N-H bond length m the :-C=O··· H-N; type hydrogen bond form, respectively It...
متن کاملSolid-State NMR Determination of 13CR Chemical Shift Anisotropies for the Identification of Protein Secondary Structure
A solid-state nuclear magnetic resonance (NMR) method for the site-resolved identification of the secondary structure of solid peptides and proteins is presented. This technique exploits the correlation between the backbone conformation and the CR chemical shift anisotropies (CSA) of proteins. The 13CR CSAs are measured under fast magic-angle-spinning using a new sequence of sixteen 180° pulses...
متن کاملHigh resolution solid-state N.M.R
High resolution solid-state N.M.R. A. Samoson a b c d , E. Lippmaa a b d & A. Pines a b c a Lawrence Berkeley Laboratory, University of California, Berkeley b Estonian Academy of Sciences, Tallinn c Department of Chemistry, University of California, and Materials and Chemical Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California, 94720, U.S.A. d Institute of Chemical Physics and...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1991
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.64.685