Temperature-dependent chemical shifts in 13C CP/MAS spectra of paramagnetic solids
✍ Scribed by James F Haw; Gordon C Campbell
- Publisher
- Elsevier Science
- Year
- 1986
- Weight
- 245 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0022-2364
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A method for temperature calibration of CP/MAS NMR probes and their temperature controllers is described that relies upon known phase changes in the compounds adamantane, d-camphor, pivalic acid and DABCO. The method appears to give a convenient and reliable calibration over the temperature range cu
## Abstract The solid‐state CP/MAS ^13^C‐NMR spectra (cross‐polarization/magic‐angle spinning ^13^C‐NMR) of eight lower cyclic and one linear oligomers and several polymers of (__R__)‐3‐hydroxybutanoic acid (3‐HB) are reported. The polymeric samples of different origin and molecular weight give rem