Chemical bonding of lead in glasses through isotropic vs anisotropic correlation: PASS shifted echo

被引：45

作者：

Fayon, F ^{[1
]}

Bessada, C ^{[1
]}

Douy, A ^{[1
]}

Massiot, D ^{[1
]}

机构：

[1] CNRS, Ctr Rech Mat Haute Temp, F-45071 Orleans 2, France

来源：

JOURNAL OF MAGNETIC RESONANCE | 1999年 / 137卷 / 01期

关键词：

solid state NMR; MAS; PASS; Pb-207; glass;

D O I：

10.1006/jmre.1998.1641

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

When observing spin I = 1/2 nuclei with important chemical shift anisotropy in disordered materials, the distribution of isotropic shift can become so large that no accessible spinning rate is able to provide a resolved spectrum. This is the case of Pb-207 in,glasses where static and high-speed MAS spectra are nearly identical. It is still possible in such a case to rebuild a spinning sideband free spectrum using a shifted echo modified PASS sequence. This makes it possible to discuss isotropic and anisotropic chemical shifts of lead in phosphate glasses, to characterize its structural role and its chemical bonding state. (C) 1999 Academic Press.

引用

页码：116 / 121

页数：6

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