Department of Chemistry and Biochemistry Seminar
- Friday, December 2, 2016 from 3:10pm to 4:00pm
- Chemistry & Biochemistry Building - view map
Dr. Veronica Vaida (University of Colorado, Boulder) will present "Chemical Processes at Environmental Water-Air Interfaces."
Abstract: Chemistry induced by sunlight can play a major role in the formation and chemical evolution of atmospheric aerosol particles and aggregates in the sea surface micro-layer, thus building complexity in the environment. This presentation will discuss investigations of the fundamental atmospheric chemistry, with an emphasis on the role of organic species at the water surface. Studies of photochemical reactions of oxoacids at water-air interfaces investigate the following questions: What role does sunlight initiated chemistry play in processing organics in the atmosphere? How do photochemical reactions affect the interface of atmospheric aerosol?
The sea surface microlayer, as well as the surface of aerosol particles, provides a unique reaction environment where organic molecules are highly concentrated and often ordered. Further, the interface creates a water-restricted environment that may promote reactions thermodynamically unfavorable in the bulk phase. In fact, the generally accepted picture of organic atmospheric aerosol now includes a fully or partially organically coated surface. Compounds at the interface are concentrated, increasing the likelihood of reaction with other surface and gas phase reactants. The presentation will discuss the connection between results of organic mechanistic photochemistry investigated in the laboratory and the evolution of molecular complexity in the environment.
- Department of Chemistry and Biochemistry