## Abstract A pulse sequence is presented which allows measurement of short __T__~1~ values (< 1 s) in solids, avoiding probe damage by the use of saturating sequences of 90° pulses. The use of the sequence is illustrated for a cross‐linked polymeric system which contains composite peaks having bot
Comparison of the Woessner and the ‘model-free’ approaches for the analysis of carbon-13 spin–lattice relaxation data for methyl groups
✍ Scribed by Duncan G. Gillies; Stephen J. Matthews; Leslie H. Sutcliffe
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 270 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
Carbon‐13 NMR relaxation data obtained for methyl groups in two dicyclohexane compounds were used to compare the Woessner and ‘model‐free’ approaches. It is shown that the extra flexibility offered by the latter leads to a more successful analysis of the data.
📜 SIMILAR VOLUMES
## Abstract ^13^C spin–lattice relaxation times (__T__~1~'s) are reported for C‐3 of 2‐methylindole (methyl,3‐^13^C~2~) as a function of the concentration of added 1,3,5‐trinitrobenzene at 35°C in 1,2‐dichloroethane. The observed decreases in __T__~1~, with increasing concentrations of 1,3,5‐trinit