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Proceedings Paper

Luminescence properties of metallopolymer-gold nanoparticle composites
Author(s): Robert J. Forster; Lynn Dennany; Michael Seery; Tia E. Keyes
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Paper Abstract

Thin films of the metallopolymer [Os(bpy)2 (PVP)10]2+, where bpy is 2,2'-dipyridyl and PVP is poly(4-vinylpyridine), luminesce at 750±12 nm upon excitation at 355nm. The luminescence decay responses can be described by a double exponential decay model in which the limiting lifetimes are 75±14 (population fraction of 0.9) and 35±8 ns (population fraction of 0.1) for films in contact with aqueous 0.1 M H2SO4. Electrochemistry has been used to create well defined concentrations of the luminescence quencher, Os3+, within the films. Time resolved spectroscopy reveals that both dynamic and static processes contribute to luminescence quenching with a rate constant for electron transfer between the photoexcited Os2+* and the Os3+ centres of 1.3x107 M-1s-1 being observed. Stable gold nanoparticles have been created within the metallopolymer by the chemical reduction of tetrachloroaurate. These nanocomposite materials exhibit enhanced emission intensity compared to the gold free films.

Paper Details

Date Published: 3 June 2005
PDF: 6 pages
Proc. SPIE 5825, Opto-Ireland 2005: Optoelectronics, Photonic Devices, and Optical Networks, (3 June 2005); doi: 10.1117/12.606155
Show Author Affiliations
Robert J. Forster, Dublin City Univ. (Ireland)
Lynn Dennany, Dublin City Univ. (Ireland)
Michael Seery, Dublin City Univ. (Ireland)
Tia E. Keyes, Dublin City Univ. (Ireland)


Published in SPIE Proceedings Vol. 5825:
Opto-Ireland 2005: Optoelectronics, Photonic Devices, and Optical Networks
John Gerard McInerney; Harold S. Gamble; Gerald Farrell; David M. Denieffe; Padraig Hughes; R. Alan Moore; Liam Barry, Editor(s)

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