Oxidation states of copper in lead borate glass

Z. Zhou; A. Navrotsky; D. S. McClure

Oxidation states of copper in lead borate glass

Z. Zhou, A. Navrotsky, D. S. McClure

Research output: Contribution to journal › Article › peer-review

Abstract

The oxidation states of copper in lead borate glass, 2PbO·B₂O₃, have been studied by quantitative optical spectroscopy. Cu(II) in lead borate glass shows a single absorption band centred at 13 800 cm^-1 (ε = 48 l cm^-1 mol^-1). This band is assigned to Cu(II) in 6-coordination. Using the Cu(II) spectra as standards, we determined the copper oxidation states in lead borate glasses doped with YBa₂Cu₃O_x and Cu₂O. Copper dissolved from YBa₂Cu₃O_x in air has an oxidation state of Cu(II), while copper dissolved from Cu₂O in argon is Cu(I). The lead borate glass itself shows slightly different optical spectra when prepared under different atmospheres. These differences may be related to small amounts of polyvalent lead, which increase with increasing oxygen fugacity, and to the presence of small amounts of a crystalline phase in the glass prepared under oxygen.

Original language	English (US)
Pages (from-to)	251-254
Number of pages	4
Journal	Physics and Chemistry of Glasses
Volume	34
Issue number	6
State	Published - Dec 1993
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Physical and Theoretical Chemistry

Cite this

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title = "Oxidation states of copper in lead borate glass",

abstract = "The oxidation states of copper in lead borate glass, 2PbO·B2O3, have been studied by quantitative optical spectroscopy. Cu(II) in lead borate glass shows a single absorption band centred at 13 800 cm-1 (ε = 48 l cm-1 mol-1). This band is assigned to Cu(II) in 6-coordination. Using the Cu(II) spectra as standards, we determined the copper oxidation states in lead borate glasses doped with YBa2Cu3Ox and Cu2O. Copper dissolved from YBa2Cu3Ox in air has an oxidation state of Cu(II), while copper dissolved from Cu2O in argon is Cu(I). The lead borate glass itself shows slightly different optical spectra when prepared under different atmospheres. These differences may be related to small amounts of polyvalent lead, which increase with increasing oxygen fugacity, and to the presence of small amounts of a crystalline phase in the glass prepared under oxygen.",

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AU - Navrotsky, A.

AU - McClure, D. S.

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N2 - The oxidation states of copper in lead borate glass, 2PbO·B2O3, have been studied by quantitative optical spectroscopy. Cu(II) in lead borate glass shows a single absorption band centred at 13 800 cm-1 (ε = 48 l cm-1 mol-1). This band is assigned to Cu(II) in 6-coordination. Using the Cu(II) spectra as standards, we determined the copper oxidation states in lead borate glasses doped with YBa2Cu3Ox and Cu2O. Copper dissolved from YBa2Cu3Ox in air has an oxidation state of Cu(II), while copper dissolved from Cu2O in argon is Cu(I). The lead borate glass itself shows slightly different optical spectra when prepared under different atmospheres. These differences may be related to small amounts of polyvalent lead, which increase with increasing oxygen fugacity, and to the presence of small amounts of a crystalline phase in the glass prepared under oxygen.

AB - The oxidation states of copper in lead borate glass, 2PbO·B2O3, have been studied by quantitative optical spectroscopy. Cu(II) in lead borate glass shows a single absorption band centred at 13 800 cm-1 (ε = 48 l cm-1 mol-1). This band is assigned to Cu(II) in 6-coordination. Using the Cu(II) spectra as standards, we determined the copper oxidation states in lead borate glasses doped with YBa2Cu3Ox and Cu2O. Copper dissolved from YBa2Cu3Ox in air has an oxidation state of Cu(II), while copper dissolved from Cu2O in argon is Cu(I). The lead borate glass itself shows slightly different optical spectra when prepared under different atmospheres. These differences may be related to small amounts of polyvalent lead, which increase with increasing oxygen fugacity, and to the presence of small amounts of a crystalline phase in the glass prepared under oxygen.

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Oxidation states of copper in lead borate glass

Abstract

ASJC Scopus subject areas

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