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A new and versatile fluorescence standard for quantum yield determination
Umeå University, Faculty of Science and Technology, Chemistry.
2001 (English)In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS, ISSN 1463-9076, Vol. 3, no 2, p. 172-4Article in journal (Refereed) Published
Abstract [en]

It is demonstrated that a new bichromophoric compound, N-2,N-3-[bis(1-hexylheptyl)-benzo[ghi]perylene-2,3,8,9,11,12-hexacarboxylic-2,3:8,9:11,12-tris(dicarboximide)]-N-1,N-1'-(1,2-ethyl)-[N-2'-(1-octylnonyl)-perylene-3,4:9,10-bis(dicarboximide)] (denoted by 1-2), provides a versatile reference molecule for measurements of fluorescence quantum yields. The compound consists of a donor (1) and an acceptor (2) part for the electronic energy. Absorption spectra of 1-2 form a nearly perfect superposition of the corresponding spectra for 1 and 2. In addition to a fluorescence quantum yield of one, 1-2 allows for choosing excitation wavelengths between 300 and 530 nm. The fluorescence lifetime of 1-2 is 4.0 +/- 0.1 ns and is independent of the excitation wavelength. The fluorescence excitation anisotropy reveals that the S-0 --> S-1 and S-0 --> S-2 transition dipoles of 1 are preferentially polarised parallel and perpendicular, respectively, to the C-2-symmetry axis of 1. The rapid transfer of electronic energy is compatible with energy transfer of the Forster type.

Place, publisher, year, edition, pages
2001. Vol. 3, no 2, p. 172-4
Identifiers
URN: urn:nbn:se:umu:diva-8632DOI: doi:10.1039/b007671fOAI: oai:DiVA.org:umu-8632DiVA, id: diva2:148303
Available from: 2008-05-06 Created: 2008-05-06 Last updated: 2018-06-09Bibliographically approved

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Johansson, Lennart B-Å

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