Photophysics of Cyanine Dyes Adsorbed onto Surfaces

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Persistent URL	http://purl.org/net/epubs/work/29700
Record Status	Checked
Record Id	29700
Title	Photophysics of Cyanine Dyes Adsorbed onto Surfaces
Contributors	LF Vieira Ferreira, AS Oliveira, K Henbest (CCLRC Rutherford Appleton Lab.), DR Worrall, F Wilkinson, CN Danson (CCLRC Rutherford Appleton Lab.), G Booth (CCLRC Rutherford Appleton Lab.)
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