Cross-section measurements for the near ultra-violet absorption spectra of glyoxal at the 280 nanometer wavelength

Authors

Abigail Diaz, Florida International University

Document Type

Thesis

Degree

Master of Science (MS)

Major/Program

Chemistry

First Advisor's Name

Jeffrey A. Joens

First Advisor's Committee Title

Committee Chair

Second Advisor's Name

James M. Quirke

Third Advisor's Name

David Chatfield

Date of Defense

7-21-2003

Abstract

Glyoxal and other dicarbonyl compounds have been detected in tropospheric air in rural areas and polluted urban areas. Accurate absorption cross-sections for the near UV spectrum of glyoxal are important since the value of this chemical characteristic is necessary for calculating effective quantum yields and ultimately the rates and products of photolysis. In this study, comprehensive measurements were made for the 2 80 nm gas-phase absorption spectrum of glyoxal. In addition, molecular orbital calculations were carried out and the results used as a guide to identify the vibration responsible for the weak structure features of the continuous area of the glyoxal spectrum. That vibration was found to be an a_g CO stretch vibration mode of the glyoxal molecule.

Identifier

FI14062268

Comments

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Recommended Citation

Diaz, Abigail, "Cross-section measurements for the near ultra-violet absorption spectra of glyoxal at the 280 nanometer wavelength" (2003). FIU Electronic Theses and Dissertations. 2798.
https://digitalcommons.fiu.edu/etd/2798