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Femtosecond Transient Absorption Anisotropy Study on [Ru(bpy)3]2+ and [Ru(bpy)(py)4]2+. Ultrafast Interligand Randomization of the MLCT State
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Department of Physical and Analytical Chemistry, Physical Chemistry I. Physics, Department of Physics and Materials Science, Chemical Physics.
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Department of Physical and Analytical Chemistry, Physical Chemistry I. Physics, Department of Physics and Materials Science, Chemical Physics.
Department of Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Department of Physical and Analytical Chemistry, Physical Chemistry I. Physics, Department of Physics and Materials Science, Chemical Physics. Organisk kemi.
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Chemistry, Department of Physical Chemistry. Department of Biochemistry and Organic Chemistry, Organic Chemistry I. Department of Physical and Analytical Chemistry, Physical Chemistry I. Physics, Department of Physics and Materials Science, Chemical Physics.
2005 (English)In: J. Phys. Chem. A, no 109, 4697-4704 p.Article in journal (Refereed) Published
Abstract [en]

It is known that the relaxed excited state of [Ru(bpy)3]2+ is best described as a metal to ligand charge transfer (MLCT) state having one formally reduced bipyridine and two neutral. Previous reports have suggested [Malone, R. et al. J.Chem. Phys 1991, 95, 8970] that the electron "hops" from ligand to ligand in the MLCT state with a time constant of about 50 ps in acetonitrile. However, we have done transient absorption anisotropy measurements indicating that already after one picosecond the molecule has no memory of which bipyridine was initially photoselected, which suggest an ultrafast interligand randomization of the MLCT state.

Place, publisher, year, edition, pages
2005. no 109, 4697-4704 p.
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Organic Chemistry Physical Chemistry Physical Chemistry
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URN: urn:nbn:se:uu:diva-73915DOI: doi:10.1021/jp0509212OAI: oai:DiVA.org:uu-73915DiVA: diva2:101826
Available from: 2006-02-24 Created: 2006-02-24 Last updated: 2011-01-11

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Wallin, StaffanDavidsson, JanModin, JuditHammarström, Leif

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