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Reactions of low work function metals Na, Al, and Ca on α,ω-€diphenyltetradecaheptaene. Implications for metal/polymer interfaces
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
Service de Chimie des Matériaux Nouveaux, Université de Mons‐Hainaut, Place du Parc 20, B‐7000 Mons, Belgium.
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
Service de Chimie des Matériaux Nouveaux, Université de Mons‐Hainaut, Place du Parc 20, B‐7000 Mons, Belgium.
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1994 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 100, no 9, 6765-6771 p.Article in journal (Refereed) PublishedText
Abstract [en]

The interactions between different low work function metals aluminium,calcium and sodium, and α,ω‐diphenyltetradecaheptaene, a model molecule for certain conjugated polymers, have been investigated using both x‐ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. The spectra are interpreted with the help of the results of quantum chemical calculations performed within the local spin density (LSD) approximation methodology. The metals are found to interact with the conjugated system in very different ways. Aluminium forms a covalent bond, which strongly modifies the π‐electronic structure of the conjugated molecule, while both the sodium and the calcium atoms act as doping agents, inducing new states in the otherwise forbidden bandgap. These new gap states can be viewed as a soliton–antisoliton pair for the Na/DP7 and a bipolaronic‐like defect for Ca/DP7.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 1994. Vol. 100, no 9, 6765-6771 p.
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Physical Sciences Chemical Sciences
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URN: urn:nbn:se:liu:diva-124172DOI: 10.1063/1.467035ISI: A1994NH84600072OAI: oai:DiVA.org:liu-124172DiVA: diva2:896148
Available from: 2016-01-20 Created: 2016-01-20 Last updated: 2016-02-02Bibliographically approved

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Dannetun, PerLögdlund, MichaelStafström, SvenSalaneck, William R.
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Department of Physics, Chemistry and BiologyThe Institute of Technology
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