Fluorescence Spectroscopy – Fluorescence and fluorescence quenching techniques, including resonance energy transfer, are used to investigate a variety of problems with biological or environmental applications. Current work is examining how soil pollutants such as PAH's and antibiotics bind to humic acid. Laser induced fluorescence and fluorescence lifetime measurements will be developed in the near future.
Laser Initiated Reactions – A Nd:YAG laser is used to irradiate a solution of graphite in alcohol and linear polyynes are produced. Research continues to investigate how to increase the yield of the polyynes and probe the mechanism of polyyne formation. Research involving other solvents, changing the laser power, irradiation time and solution concentration is underway.
Areas of Expertise (5)
Donald B. Hoffman Research Fellowship (professional)
Donald B. Hoffman Research Fellowship for the academic year 2003-04.
University of Colorado: Ph.D., Chemistry
McDaniel College: B.A., Chemistry
A fluorescence quenching method was used to determine the equilibrium binding constants for the association of acridine, acridine orange, and acridine yellow G to humic acid. The fluorescence of each polycyclic aromatic nitrogen heterocycle (PANH) was monitored as aliquots of humic acid were added, and a Stern\u2013Volmer plot was produced in which the slope is the equilibrium constant of the binding reaction.
The one-dimensional, particle-in-a-box model is an integral part of most undergraduate physical chemistry courses. Linear polyynes can be synthesized and are found to serve as real-world examples of the particle-in-a-box model. An improved set of experimental ...
Many quantum mechanical models are discussed as part of the undergraduate physical chemistry course to help students understand the connection between eigenvalue expressions and spectroscopy. Typical examples covered include the particle in a box, the ...
In this experiment, linear polyynes are synthesized and then the predictions of a one-dimensional, particle in a box are used to calculate the quantum mechanical box length for the polyynes. A solution of graphite in ethanol is irradiated with a Nd: YAG laser (532 nm) ...