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Proceedings Paper

Fiber Optic Fluorosensor For Sulfur Dioxide Based On Energy Transfer And Exciplex Quenching
Author(s): Ashutosh Sharma; Otto S. Wolfbeis
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Paper Abstract

A new type of fiber-optic sensor for sulfur dioxide is described that is based on the inhibition of the electronic energy transfer from pyrene (the donor) to perylene (the acceptor) both dissolved in thin layer of a silicone polymer that is attached to the end of a bifurcated fiber bundle. While the donor alone is efficiently quenched by sulfur dioxide, the acceptor is not. The donor-acceptor energy transfer systems, in contrast, is extremely efficiently quenched by S02 with an Stern-Volmer constant 3-fold larger than that for the quenching of pyrene alone. The excitation light wavelength was that for pyrene (333 nm), and the fluorescence was monitored at the fluorescence of perylene (470 nm) where pyrene itself is non-fluorescent. Stern-Volmer graphs describing the quenching by sulfur dioxide are given. The results are interpreted in terms of an extremely efficient quenching of the donor-acceptor exciplex.

Paper Details

Date Published: 19 January 1989
PDF: 6 pages
Proc. SPIE 0990, Chemical, Biochemical, and Environmental Applications of Fibers, (19 January 1989); doi: 10.1117/12.959982
Show Author Affiliations
Ashutosh Sharma, Karl-Franzens University (Austria)
Otto S. Wolfbeis, Karl-Franzens University (Austria)

Published in SPIE Proceedings Vol. 0990:
Chemical, Biochemical, and Environmental Applications of Fibers
Robert A. Lieberman; Marek T. Wlodarczyk, Editor(s)

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