207Pb NMR of minium, Pb3O4:: evidence for the [Pb2]4+ ion and possible relativistic effects in the Pb-Pb bond

被引：15

作者：

Gabuda, SP

Kozlova, SG

Terskikh, VV

Dybowski, C ^{[1
]}

Neue, G

Perry, DL

机构：

[1] Univ Delaware, Dept Chem & Biochem, Newark, DE 19716 USA

[2] Inst Inorgan Chem, Novosibirsk 630090, Russia

[3] Boreskov Inst Catalysis, Novosibirsk 630090, Russia

[4] Univ Dortmund, D-44221 Dortmund, Germany

[5] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

来源：

SOLID STATE NUCLEAR MAGNETIC RESONANCE | 1999年 / 15卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

Pb-207; NMR; Pb3O4;

D O I：

10.1016/S0926-2040(99)00038-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Solid Pb3O4 has been studied with Pb-207 nuclear magnetic resonance (NMR) spectroscopy. The Pb-207 NMR chemical-shift tensor of the Pb2+ site has principal values of delta(11) = 1980 +/- 5 ppm, delta(22) = 1540 +/- 5 ppm, and delta(33) = -1108 +/- 10 ppm; delta(iso) = 804 +/- 10 ppm. The chemical-shift tensor of the Pb4+ site is axial, with principal values delta(11) = -1009 +/- 3 ppm and delta(perpendicular to) = 1132 +/- 3 ppm; delta(iso) = -1091 +/- 3 ppm. The Pb4+-Pb2+ scalar coupling constant J(Pb-Pb) = 2.3 +/- 0.1 kHz. The main contribution to the Pb2+ chemical-shift anisotropy is proposed to arise from an exchange interaction in the Pb2+-Pb2+ pairs, conventionally regarded as molecular [Pb-2](4+) ions. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：103 / 107

页数：5

共 14 条

[1] NUCLEAR SPIN EXCHANGE IN SOLIDS - TL-203 AND TL-205 MAGNETIC RESONANCE IN THALLIUM AND THALLIC OXIDE [J].