Fluorescence of Matrix-Isolated Biacetyl Erin Gatrone Nathan Kuchmas C.A. Baumann University of Scranton Department of Chemistry.

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Presentation transcript:

Fluorescence of Matrix-Isolated Biacetyl Erin Gatrone Nathan Kuchmas C.A. Baumann University of Scranton Department of Chemistry

Background Irradiation (520nm>λ>485nm) results in a variety of products – methylhydroxycarbene (CH 3 COH) – ketene (CH 2 CO) The wavelength suggests a multiphoton process

Photoproducts h Previous work in this group has shown that one of the photolytic pathways in the matrix is a complex between ketene and cis methylhydroxycarbene

Experimental Outline Reagent:Matrix Ratio (~1:1000) – Reagent Biacetyl (C 4 H 6 O 2 ) Deuterated Biacetyl (C 4 D 6 O 2 ) – Matrix N 2, O 2, Kr, Ar Argon Ion Laser 514nm 488nm Irradiation – 1 hour – 0.1W to 1.0W IR Spectra – 100 Scans at 1cm -1

Biacetyl Energy Levels

Experimental Outline Reagent:Matrix Ratio (~1:1000) – Reagent Biacetyl (C 4 H 6 O 2 ) Deuterated Biacetyl (C 4 D 6 O 2 ) – Matrix N 2, Kr Argon Ion Laser 514nm 488nm Irradiation –.1W to.4W Collection with Monochromator – Acton Spectra Pro 2300i -.3m Imaging Triple Grating Monochromator/Spectragraph

Irradiation Laser

Mirror Monochromator Focusing Lens Interference Filter

Biacetyl Energy Levels

Future Experiments Deuterated biacety and biacetyl in: – Krypton – Argon – Nitrogen Determine the lifetimes of the emissions

Acknowledgements David A. Rusak, Ph.D National Science Foundation Petroleum Research Fund