Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Foster, Stephen C.

Committee Member

Mlsna, Todd E.

Committee Member

Henry, William P.

Date of Degree

8-17-2013

Document Type

Graduate Thesis - Open Access

Major

Chemistry

Degree Name

Master of Science

College

College of Arts and Sciences

Department

Department of Chemistry

Abstract

Upconversion studies typically use a laser as the source of low-energy photons. A lower cost, lower power, and fully tunable system was used here. The Fluoromax-4 spectrofluorometer incorporates a 150-W xenon lamp and illuminates a 1 cm3 volume in a standard cuvette. The 1 cm x 1cm excitation beam was reduced to 1 mm x 1 mm, increasing the power density by 100. The cuvette was mounted upon a translation stage so that the excitation beam could skim the inside surface of the cuvette. This minimized self-absorption of the output. Finally, an optical filter was included between the excitation monochromator and the cuvette to ensure that the solution was not exposed to undesired wavelengths. The instrument was tested with a known sensitizer/emitter system and upconversion was detected. Subsequently, a new pair of compounds was studied but the [Ru(deab)3]2+/BPEA solution did not exhibit upconversion in the modified instrument.

URI

https://hdl.handle.net/11668/19945

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