Fiber Optic Fluorosensor For Sulfur Dioxide Based On Energy Transfer And Exciplex Quenching

Ashutosh Sharma; Otto S. Wolfbeis

doi:10.1117/12.959982

19 January 1989 Fiber Optic Fluorosensor For Sulfur Dioxide Based On Energy Transfer And Exciplex Quenching

Ashutosh Sharma, Otto S. Wolfbeis

Proceedings Volume 0990, Chemical, Biochemical, and Environmental Applications of Fibers; (1989) https://doi.org/10.1117/12.959982
Event: O-E/Fiber LASE '88, 1988, Boston, MA, United States

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.

Citation Download Citation

Ashutosh Sharma and Otto S. Wolfbeis "Fiber Optic Fluorosensor For Sulfur Dioxide Based On Energy Transfer And Exciplex Quenching", Proc. SPIE 0990, Chemical, Biochemical, and Environmental Applications of Fibers, (19 January 1989); https://doi.org/10.1117/12.959982

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