Title page for ETD etd-05132009-143925


Type of Document Master's Thesis
Author Brown, Jared R
Author's Email Address jrbmbm3@vt.edu
URN etd-05132009-143925
Title Analytical Methods Development for High-Throughput Photochemisty With Led Arrays
Degree Master of Science
Department Chemistry
Advisory Committee
Advisor Name Title
Brewer, Karen J. Committee Chair
Anderson, Mark R. Committee Member
Deck, Paul A. Committee Member
Tanko, James M. Committee Member
Yee, Gordon T. Committee Member
Keywords
  • Hydrogen
  • Method Validation
  • Solar Energy
Date of Defense 2007-05-03
Availability unrestricted
Abstract
This thesis describes the design, construction, and evaluation of a series of LED array photolysis systems for high throughput photochemistry. Three generations of array systems of increasing sophistication are evaluated using calorimetric measurements and potassium tris(oxalato)ferrate(III) chemical actinometry. The results are analyzed using descriptive statistics and analysis of variance (ANOVA). The LEDs in the third generation array were shown to be statistically equivalent, with respect to light output, according to physical and chemical actinometry experiments. The third generation LED array was compared with a traditional 1000 W Xe arc lamp source in terms of cost, light intensity, and light stability. Two constant current drivers were evaluated with respect to LED array performance. The optimized third generation LED array was evaluated as the photolysis source for photochemical hydrogen production experiments using the supramolecular catalyst [{(bpy)2Ru(dpp)}2RhCl2](PF6)5.
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