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Persistent URL http://purl.org/net/epubs/work/29700
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Record Id 29700
Title Photophysics of Cyanine Dyes Adsorbed onto Surfaces
Abstract This report describes the experiment carried out at the Central Laser Facility from 6-20 January 1997. The photo physics of 3,3'-Diethyloxadicarbocyanine iodide (DODCI) adsorbed onto swollen microcrystalline cellulose was investigated. Two fluorescence emissions bands have been observed and assigned. One was due to singlet excited monomers and a second new emission, seen at high laser fluences, was due to the formation of a photoisomer. The DODCI stays entrapped between the polymer chains and nonradiative pathways for deactivation are reduced; the lifetimes of the excited states were measured using time resolved fluorescence lifetimes techniques. The fluorescence lifetimes of the excited states are longer lived in a swollen cellulose matrix. The photoisomer emission especially lives an order of magnitude longer than in homogeneous media.
Organisation CCLRC , CLF
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Language English (EN)
Type Details URI(s) Local file(s) Year
Report RAL Technical Reports RAL-TR-1998-012. 1998. raltr-1998012.pdf 1998