207Pb NMR in minium, Pb3O4: Evidence for the [Pb2]4+ ion andpossible relativistic effects in the Pb-Pb bond
Journal Article
·
· Solid State Nuclear Magnetic Resonance
Solid Pb3O4 has been studied with 207Pb nuclear magnetic resonance (NMR) spectroscopy. The 207Pb NMR chemical-shift tensor of the Pb2+ site has principal values of delta 11=1980+-5 ppm, delta 22=1540+-5ppm, 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 bar bar=-1009+-3 ppm and delta perpendicular=1132+-3 ppm; delta iso=-1091+-3ppm. The Pb4+ Pb2+ scalar coupling constant JPb 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 [Pb2]4+ ions.
- Research Organization:
- OLLABORATION - Institute of InorganicChemistry, Novosibirsk 630090, Russian Federation; Boreskov Institute ofCatalysis, Novosibirsk 630090, Russian Federation; Department ofChemistry and Biochemis
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 861337
- Report Number(s):
- LBNL-46492; doi:10.1016/S0926-2040(99)00038-7; SSNRE4; TRN: US0600312
- Journal Information:
- Solid State Nuclear Magnetic Resonance, Vol. 15, Issue 2; Related Information: Journal Publication Date: November1999; ISSN 0926-2040
- Country of Publication:
- United States
- Language:
- English
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