J Z Hu, A M Orendt, D W Alderman, R J Pugmire, C Ye, D M Grant
Index: Solid State Nucl. Magn. Reson. 3(4) , 181-97, (1994)
Full Text: HTML
The magic-angle turning (MAT) experiment introduced by Gan is developed into a powerful and routine method for measuring the principal values of 13C chemical shift tensors in powdered solids. A large-volume MAT probe with stable rotation frequencies down to 22 Hz is described. A triple-echo MAT pulse sequence is introduced to improve the quality of the two-dimensional baseplane. It is shown that measurements of the principal values of chemical shift tensors in complex compounds can be enhanced by using either short contact times or dipolar dephasing pulse sequences to isolate the powder patterns from protonated or non-protonated carbons, respectively. A model compound, 1,2,3-trimethoxybenzene, is used to demonstrate these techniques, and the 13C principal values in 2,3-dimethylnaphthalene and Pocahontas coal are reported as typical examples.
Structure | Name/CAS No. | Molecular Formula | Articles |
---|---|---|---|
![]() |
dimethoxyanisole
CAS:634-36-6 |
C9H12O3 |
2,4-diamino-5-benzylpyrimidines and analogues as antibacteri...
1983-05-01 [J. Med. Chem. 26(5) , 667-73, (1983)] |
Quantitative 2D HSQC NMR determination of polymer structures...
2007-01-01 [Magn. Reson. Chem. 45(1) , 37-45, (2007)] |
An Au-catalyzed cyclialkylation of electron-rich arenes with...
2004-05-19 [J. Am. Chem. Soc. 126(19) , 5964-5, (2004)] |
Synthesis of cyclophanetetrayne complexes from bis(propargyl...
2002-07-21 [Chem. Commun. (Camb.) (14) , 1550-1, (2002)] |
Selective saturation and inversion of multiple resonances in...
1992-11-01 [Solid State Nucl. Magn. Reson. 1(4) , 185-95, (1992)] |
Home | MSDS/SDS Database Search | Journals | Product Classification | Biologically Active Compounds | Selling Leads | About Us | Disclaimer
Copyright © 2024 ChemSrc All Rights Reserved