Röntgenabsorptionsspektroskopie an PhosphorsalzperlenBestimmung der geometrischen und elektronischen Struktur von metalloxid-dotierten Natruimphosphatgläsern
Röntgenabsorptionsspektroskopie an Phosphorsalzperlen
Bestimmung der geometrischen und elektronischen Struktur von metalloxid-dotierten Natruimphosphatgläsern
Dokument öffnen (5.2MB)Art der Hochschulschrift
DissertationPrüfungsdatum
06.02.2004Datum der Veröffentlichung
2004Erstgutachter
Hormes, Josef F.Zweitgutachter
Glaum, RobertMetadaten
Zur Langanzeige
Zitierbare Links 
Inhalt
Sodium metaphosphate glasses doped with transition metal oxides show characteristic colors. X-ray Absorption Spectroscopy (XAS) investigations provide information whether the coloration stems from different electronic transitions or changes in the geometrical structure of the glasses. Even though the violet color of MnOy-doped glasses is considered as an evidence for Mn3+-ions, Mn K-XAS reveals that the majority of the manganese ions are in the oxidation state +II and have a mixed coordination of four and six oxygen atoms, respectively. The oxygen coordination around the nickel ions in NiO-doped glasses with different metall oxide concentrations is always six. The change of color from citreous to auburn with increasing nickel oxide content is attributed to a systematic change in the bonding characteristic from mainly ionic-like to a small but significant contribution of covalent-like bonding. Analysis of higher coordination shells provides no indication of the formation of metal oxide clusters.
Schlagwörter
Röntgenabsorptionsspektraskopie, EXAFS, Xanes, Natriumphosphat, Glas, Kautschuk, Vulkanisation, Cross-Link Density
Klassifikation (DDC)
530 PhysikBrendebach, Boris: Röntgenabsorptionsspektroskopie an Phosphorsalzperlen : Bestimmung der geometrischen und elektronischen Struktur von metalloxid-dotierten Natruimphosphatgläsern. - Bonn, 2004. - Dissertation, Rheinische Friedrich-Wilhelms-Universität Bonn.
Online-Ausgabe in bonndoc: https://nbn-resolving.org/urn:nbn:de:hbz:5n-03280
Online-Ausgabe in bonndoc: https://nbn-resolving.org/urn:nbn:de:hbz:5n-03280
@phdthesis{handle:20.500.11811/2019,
urn: https://nbn-resolving.org/urn:nbn:de:hbz:5n-03280,
author = {{Boris Brendebach}},
title = {Röntgenabsorptionsspektroskopie an Phosphorsalzperlen : Bestimmung der geometrischen und elektronischen Struktur von metalloxid-dotierten Natruimphosphatgläsern},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2004,
note = {Sodium metaphosphate glasses doped with transition metal oxides show characteristic colors. X-ray Absorption Spectroscopy (XAS) investigations provide information whether the coloration stems from different electronic transitions or changes in the geometrical structure of the glasses. Even though the violet color of MnOy-doped glasses is considered as an evidence for Mn3+-ions, Mn K-XAS reveals that the majority of the manganese ions are in the oxidation state +II and have a mixed coordination of four and six oxygen atoms, respectively. The oxygen coordination around the nickel ions in NiO-doped glasses with different metall oxide concentrations is always six. The change of color from citreous to auburn with increasing nickel oxide content is attributed to a systematic change in the bonding characteristic from mainly ionic-like to a small but significant contribution of covalent-like bonding. Analysis of higher coordination shells provides no indication of the formation of metal oxide clusters.},
url = {https://hdl.handle.net/20.500.11811/2019}
}
urn: https://nbn-resolving.org/urn:nbn:de:hbz:5n-03280,
author = {{Boris Brendebach}},
title = {Röntgenabsorptionsspektroskopie an Phosphorsalzperlen : Bestimmung der geometrischen und elektronischen Struktur von metalloxid-dotierten Natruimphosphatgläsern},
school = {Rheinische Friedrich-Wilhelms-Universität Bonn},
year = 2004,
note = {Sodium metaphosphate glasses doped with transition metal oxides show characteristic colors. X-ray Absorption Spectroscopy (XAS) investigations provide information whether the coloration stems from different electronic transitions or changes in the geometrical structure of the glasses. Even though the violet color of MnOy-doped glasses is considered as an evidence for Mn3+-ions, Mn K-XAS reveals that the majority of the manganese ions are in the oxidation state +II and have a mixed coordination of four and six oxygen atoms, respectively. The oxygen coordination around the nickel ions in NiO-doped glasses with different metall oxide concentrations is always six. The change of color from citreous to auburn with increasing nickel oxide content is attributed to a systematic change in the bonding characteristic from mainly ionic-like to a small but significant contribution of covalent-like bonding. Analysis of higher coordination shells provides no indication of the formation of metal oxide clusters.},
url = {https://hdl.handle.net/20.500.11811/2019}
}
Die folgenden Nutzungsbestimmungen sind mit dieser Ressource verbunden:
