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On the origin of high transient anisotropies: An exemplification in a Cd-porphyrin
Stockholm University, Faculty of Science, Department of Physics.
2013 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 139, no 22, 224309- p.Article in journal (Refereed) Published
Abstract [en]

Transient anisotropy is a widely used spectroscopic method to access the polarization dynamics of a molecular sample. In this contribution, we present results on 5,10,15,20-tetraphenyl-porphyrinato cadmium (II) in tetrahydrofuran which exhibits values exceeding the typical range between 0.4 and -0.2 in dependence of the probe wavelength. These findings are explained by varying contributions from excited state absorption and ground state bleaching/stimulated emission. Model calculations show that time zero values and time decays are complex values that often do not correlate with the underlying physical processes. As a consequence, the interpretation of anisotropy experiments necessitates extreme care.

Place, publisher, year, edition, pages
2013. Vol. 139, no 22, 224309- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-99882DOI: 10.1063/1.4840415ISI: 000328729000024OAI: oai:DiVA.org:su-99882DiVA: diva2:690469
Note

AuthorCount:4;

Available from: 2014-01-23 Created: 2014-01-20 Last updated: 2017-12-06Bibliographically approved

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