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Robert B. Gregory

Assistant Professor

Department of Chemistry

Indiana University Purdue University Fort Wayne

2101 East Coliseum Boulevard

Fort Wayne, Indiana 46805

(260) 481-6298
AIM: gregoryipfw Yahoo!: gregory.ipfw MSN: gregoryipfw@hotmail.com

gregoryr@ipfw.edu

 

My work
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 I am an industrial analytical chemist. I have worked in a variety of industries, and have developed applications in the areas of infrared and Raman spectroscopy, chromatography, electrochemistry, and materials analysis. Duis te feugifacilisi. Duis autem dolor in hendrerit in vulputate velit esse molestie consequat, vel illum dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit au gue duis dolore te feugat nulla facilisi.
I am actively pursuing teaching at the college level. I love teaching, and always have. My specialty is analytical chemistry, but I have experience teaching general chemistry. I would enjoy teaching physical or inorganic chemistry as well.
My thesis work was in the the area of laser fluorescence. I did my graduate work under Dr. Fred Lytle of Purdue University. Specifically, I developed a type of fluorescence instrument that determined the fluorescent decay time of materials through the counting of photons in phase fluorimetry.
Photon counting had been used for years in pulsed experiments, where single photons of light excite a sample, and the time it takes emitted photons to emerge from the sample is measured. This is typically measured in micro- (10-6), nano- (10-9), or picoseconds (10-12)
My work utilized photon counting with continuous lasers modulated so that the counting of the photons provided the lifetimes of the fluorescence. This modulation was at a very high frequency (up to 1.3 GHz), and gave us the ability to measure lifetimes in the single picosecond regime.
My work in the soap and cosmetics industry for Stepan Company spanned several areas of surfactant chemistry and analysis.  I developed many methods for surfactants and polyacrylates that used advanced methods to determine structure, efficacy, safety, or composition. I am most proud of the optical spectroscopic methods that we developed.
These methods utilized principle component regression, which is a matrix method that analyzes the entire spectrum of a sample at once. It uses multiple standards at different levels of each component that span the entire range of concentrations that each component will exhibit.