某些PbO-Al2O3-P2O5玻璃结构的魔角旋转核磁共振研究
Magic-angle spinning nuclear magnetic resonance study of the structure of some PbO-Al2O3-P2O5 glasses.
作者信息
Lockyer M W, Holland D, Howes A P, Dupree R
机构信息
Physics Department, Warwick University, Coventry, UK.
出版信息
Solid State Nucl Magn Reson. 1995 Oct;5(1):23-34. doi: 10.1016/0926-2040(95)00034-n.
Some PbO-Al2O3-P2O5 glasses have been investigated using 31P and 27Al magic-angle spinning nuclear magnetic resonance. The observed spectra could be divided into two groups. In the first, Al(IV), Al(V) and Al(VI) are observed, the 31P linewidths are large and the chemical shift range (-30 to -36 ppm) is typical of network phosphate. In the second group, only Al(VI) is observed, the 31P linewidths are much narrower and the shifts are less negative (-18 to -28 ppm).
一些PbO-Al₂O₃-P₂O₅玻璃已通过³¹P和²⁷Al魔角旋转核磁共振进行了研究。观察到的光谱可分为两组。在第一组中，观察到了Al(IV)、Al(V)和Al(VI)，³¹P线宽较大，化学位移范围（-30至-36 ppm）是网络磷酸盐的典型特征。在第二组中，仅观察到Al(VI)，³¹P线宽窄得多，位移的负值较小（-18至-28 ppm）。
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