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Single- and multi-photon excited fluorescence from serotonin complexed with B-cyclodextrin

Botchway, SW, Bisby, RH, Dad, S and Parker, AW 2006, 'Single- and multi-photon excited fluorescence from serotonin complexed with B-cyclodextrin' , Photochemical and Photobiological Science, 5 , pp. 122-126.

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        Abstract

        The fluorescence of serotonin on binding with B-cyclodextrin has been studied using both steady-state and time-resolved methods. Steady state fluorescence intensity of serotonin at 340 nm showed ~ 30% increase in intensity on binding with Ka ~ 60 dm3 mol 1 and the fluorescence lifetimes showed a corresponding increase. In contrast, the characteristic green fluorescence (‘hyperluminescence’) of serotonin observed upon multiphoton near-infrared excitation with sub-picosecond pulses was resolved into two lifetime components assigned to free and bound serotonin. The results are of interest in relation to selective imaging and detection of serotonin using the unusual hyperluminescence emission and in respect to recent determinations of serotonin by capillary electrophoresis in the presence of cyclodextrin. The results also suggest that hyperluminescence occurs from multiphoton excitation of a single isolated serotonin molecule.

        Item Type: Article
        Uncontrolled Keywords: serotonin, cyclodextrin, fluorescence lifetime, multiphoton, hyperluminescence
        Themes: Subjects / Themes > Q Science > QH Natural history > QH301 Biology
        Subjects outside of the University Themes
        Schools: Colleges and Schools > College of Science & Technology
        Colleges and Schools > College of Science & Technology > School of Environment and Life Sciences
        Colleges and Schools > College of Science & Technology > School of Environment and Life Sciences > Biomedical Research Centre
        Journal or Publication Title: Photochemical and Photobiological Science
        Publisher: Royal Society of Chemistry
        Refereed: Yes
        ISSN: 1474-905X
        Funders: Science and Technology Facilities Council (STFC), Biotechnology and Biosciences Sciences Research Council (BBSRC)
        Depositing User: RH Bisby
        Date Deposited: 20 Sep 2010 10:21
        Last Modified: 17 Feb 2014 15:46
        URI: http://usir.salford.ac.uk/id/eprint/10092

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