DESIGN AND OPERATION OF A SUPERSONIC JET AND LASER-INDUCED FLUORESENCE EXCITATION APPARATUS FOR ANALYSIS OF VIBRATIONAL LEVELS IN ELECTRONIC EXCITED STATES
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Date
1991
Journal Title
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Publisher
Ohio State University
Abstract
An experimental apparatus, based on a Nd:YAG laser system, for fluorescence excitation spectroscopy in a supersonic jet has been constructed and optimized for the collection of spectra from weakly fluorescing samples. The critical experimental parameters and the methods necessary for their determination will be discussed. Details relating to experimental timing, optical alignment, supersonic jet operation, and nozzle design are of special importance. A detailed description of the hardware and software will be presented. The spectra obtained at low temperatures for various carbonyl compounds, such as 2-cyclopenten-1-one, 1-propanal, and 1-propynal, will be shown. These can be analyzed to determine the vibrational levels and molecular conformations in the electronic excited states.
Description
Author Institution: Department of Chemistry, Texas A \& M University