Solid-state NMR investigation of phosphorus in aluminoborosilicate glasses
โ Scribed by C. Rong; K.C. Wong-Moon; H. Li; P. Hrma; H. Cho
- Book ID
- 117148566
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 799 KB
- Volume
- 223
- Category
- Article
- ISSN
- 0022-3093
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The purpose of this study was to investigate the impact of annealing on molecular mobility in lyophilized glasses, composed of a saccharide excipient and a small concentration of aspartame as a model ''drug.'' Changes in molecular dynamics during annealing were monitored through carbon ( 13 C) T 1 a
## Abstract Solidโstate CP/MAS ^31^P NMR spectra were measured for the following unsaturated phosphorusโnitrogenโsulfur ring systems: 1,5โR~4~P~2~N~4~S~2~ (R = Me, Et, Ph), 1,5โPh~4~P~2~N~4~S~2~Ph~2~, Ph~2~PN~4~S~3~NPPh~3~ and Ph~2~PN~3~S~2~. The isotropic solidโstate shifts correlate well with the