We propose to combine isotopologue synthetic chemistry and aerosol science to form a collaborative team uniquely and ideally suited to providing new insights into the complex chemical reactions that take place inside biogenic secondary organic aerosol (SOA) particles. Our approach takes advantage of our ability to synthesize noncommercially available isotopically-labeled pinene derivatives and their oxidation/accretion products, including aldol and ester dimers, trimers and oligomers. Isotopologues of these compounds will be used in atmospheric chamber experiments to test competing hypothesis of the prevailing chemical mechanism and thus elucidate previously unknown mechanistic aspects of oxidation/accretion pathways and particle formation. Given the close interlink between the gas and particle phases of an aerosol, including interactions with water vapor, the atmospherically relevant conditions can be much better established in an aerosol experiment compared to a traditional organic chemistry experiments that are typically run in solution phase and often do not represent realistic models of complex aerosol environments.
|Effective start/end date||9/1/20 → 8/31/23|
- National Science Foundation (CHE-2003359)