Influence of metal-metal bonds on electron spectra of MoO2 and WO2
Core and valence level photoemission and electron energy loss (EELs) spectra of MoO2 and WO2 have been measured. Metal-metal bonding in these distorted rutile dioxides splits the metal 4d or 5d conduction band into two components, with a significantly bigger splitting for WO2 than MoO2. The O 2p ban...
| Huvudupphovsmän: | , , , |
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| Materialtyp: | Journal article |
| Språk: | English |
| Publicerad: |
1996
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| _version_ | 1826285240075681792 |
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| author | Gulino, A Parker, S Jones, F Egdell, R |
| author_facet | Gulino, A Parker, S Jones, F Egdell, R |
| author_sort | Gulino, A |
| collection | OXFORD |
| description | Core and valence level photoemission and electron energy loss (EELs) spectra of MoO2 and WO2 have been measured. Metal-metal bonding in these distorted rutile dioxides splits the metal 4d or 5d conduction band into two components, with a significantly bigger splitting for WO2 than MoO2. The O 2p bandwidth is also found to be bigger for WO2 then MoO2. Plasmon loss peaks below 2 eV show that the effective mass ratios for electrons not involved in σ metal-metal bonding are much greater than unity. The photoemission and EELS data both suggest that metal-metal π bonding is important in these compounds. Comparison between photoemission spectra of WO2 and oxygen-deficient Na0.65WO3-y suggests that structure evident in the bandgap of the latter compound may be associated with metal-metal bonding allowed by oxygen deficiency. |
| first_indexed | 2024-03-07T01:25:54Z |
| format | Journal article |
| id | oxford-uuid:91f73836-d839-4307-81d1-50677e3b076b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:25:54Z |
| publishDate | 1996 |
| record_format | dspace |
| spelling | oxford-uuid:91f73836-d839-4307-81d1-50677e3b076b2022-03-26T23:22:14ZInfluence of metal-metal bonds on electron spectra of MoO2 and WO2Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:91f73836-d839-4307-81d1-50677e3b076bEnglishSymplectic Elements at Oxford1996Gulino, AParker, SJones, FEgdell, RCore and valence level photoemission and electron energy loss (EELs) spectra of MoO2 and WO2 have been measured. Metal-metal bonding in these distorted rutile dioxides splits the metal 4d or 5d conduction band into two components, with a significantly bigger splitting for WO2 than MoO2. The O 2p bandwidth is also found to be bigger for WO2 then MoO2. Plasmon loss peaks below 2 eV show that the effective mass ratios for electrons not involved in σ metal-metal bonding are much greater than unity. The photoemission and EELS data both suggest that metal-metal π bonding is important in these compounds. Comparison between photoemission spectra of WO2 and oxygen-deficient Na0.65WO3-y suggests that structure evident in the bandgap of the latter compound may be associated with metal-metal bonding allowed by oxygen deficiency. |
| spellingShingle | Gulino, A Parker, S Jones, F Egdell, R Influence of metal-metal bonds on electron spectra of MoO2 and WO2 |
| title | Influence of metal-metal bonds on electron spectra of MoO2 and WO2 |
| title_full | Influence of metal-metal bonds on electron spectra of MoO2 and WO2 |
| title_fullStr | Influence of metal-metal bonds on electron spectra of MoO2 and WO2 |
| title_full_unstemmed | Influence of metal-metal bonds on electron spectra of MoO2 and WO2 |
| title_short | Influence of metal-metal bonds on electron spectra of MoO2 and WO2 |
| title_sort | influence of metal metal bonds on electron spectra of moo2 and wo2 |
| work_keys_str_mv | AT gulinoa influenceofmetalmetalbondsonelectronspectraofmoo2andwo2 AT parkers influenceofmetalmetalbondsonelectronspectraofmoo2andwo2 AT jonesf influenceofmetalmetalbondsonelectronspectraofmoo2andwo2 AT egdellr influenceofmetalmetalbondsonelectronspectraofmoo2andwo2 |