liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
The electronic structure of poly(pyridine-2,5-diyl) investigated by soft X-ray absorption and emission spectroscopies
Uppsala University.ORCID iD: 0000-0002-0317-0190
Linköping University, Department of Physics, Chemistry and Biology, Computational Physics. Linköping University, The Institute of Technology.
Uppsala University.
Uppsala University.
Show others and affiliations
1998 (English)In: Chemical Physics, ISSN 0301-0104, E-ISSN 1873-4421, Vol. 237, no 3, 295-304 p.Article in journal (Refereed) Published
Abstract [en]

The electronic structure of the poly-pyridine conjugated polymer has been investigated by resonant and non-resonant inelastic X-ray scattering and X-ray absorption spectroscopies using synchrotron radiation. The measurements were made for both the carbon and nitrogen contents of the polymer. The analysis of the spectra has been carried out in comparison with molecular orbital calculations taking the repeat-unit cell as a model molecule of the polymer chain. The simulations indicate no significant differences in the absorption and in the non-resonant X-ray scattering spectra for the different isomeric geometries, while some isomeric dependence of the resonant spectra is predicted. The resonant emission spectra show depletion of the electron bands in line with symmetry selection and momentum conservation rules. The effect is most visual for the carbon spectra; the nitrogen spectra are dominated by lone pair n orbital emission of symmetry and are less frequency dependent.

Place, publisher, year, edition, pages
1998. Vol. 237, no 3, 295-304 p.
National Category
Natural Sciences
URN: urn:nbn:se:liu:diva-54986DOI: 10.1016/S0301-0104(98)00262-6OAI: diva2:312912
Available from: 2010-04-26 Created: 2010-04-26 Last updated: 2013-10-02
In thesis
1. Electronic Structure Studies Using Resonant X-ray and Photemission Spectroscopy
Open this publication in new window or tab >>Electronic Structure Studies Using Resonant X-ray and Photemission Spectroscopy
1999 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis addresses the electronic structure of molecules and solids using resonant X-ray emission and photoemission spectroscopy. The use of monochromatic synchrotron radiation and the improved performance of the instrumentation have opened up the possibility of detailed analyses of the response of the electronic systems under interaction with X-rays. The experimental studies are accompanied by numerical ab initio calculations in the formalism of resonant inelastic scattering. The energy selectivity has made it possible for the first time to study how the chemical bonds in a molecule break up during resonant inelastic X-ray scattering. In the conjugated polymer systems, the element selectivity of the X-ray emission process made it possible to probe the different atomic elements separately. The X-ray emission technique proved to be useful for extracting isomeric information, and for measuring the change in the valence levels at different degrees of doping. In this thesis, spectral satellite features in transition metals were thoroughly investigated for various excitation energies around a core-level threshold. By measuring the relative spectral intensity of the satellites it was possible to extract information on the partial core-level widths. Using the nickel metal system as an example, it was shown that it is possible to probe the different core-excited states close toshake-up thresholds by measuring the relative spectral intensity variation of the Auger emission.Resonant photoemission measurements showed unambiguous evidence of interference effects. Theseeffects were also thoroughly probed using angle-dependent measurements. The combination of X-rayemission and absorption were useful for studying buried layers and interfaces due to the appreciable penetration depth of soft X-rays. X-ray scattering was further found to be useful for studying low-energy excited states of rare earth metallic compounds and transition metal oxides.

Place, publisher, year, edition, pages
Uppsala: Uppsala University, 1999
, Acta Universitatis Upsaliensis, ISSN 1104-232X ; 452
Electronic structure, resonant x-ray emission, photoemission spectroscopy
National Category
Physical Sciences
urn:nbn:se:liu:diva-56480 (URN)91-554-4463-6 (ISBN)
Public defence
Available from: 2010-05-19 Created: 2010-05-18 Last updated: 2013-11-14Bibliographically approved

Open Access in DiVA

fulltext(576 kB)191 downloads
File information
File name FULLTEXT01.pdfFile size 576 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full textX-ray spectroscopy using synchrotron radiationArXiVChemical PhysicsMendeleyResearchgate

Search in DiVA

By author/editor
Magnuson, MartinSalaneck, William R.
By organisation
Computational PhysicsThe Institute of TechnologyDepartment of Physics, Chemistry and BiologySurface Physics and Chemistry
In the same journal
Chemical Physics
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 191 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 1743 hits
ReferencesLink to record
Permanent link

Direct link