Emmanuel Assaf

Research Scientist I

Chemical Processes & Instrument Development

NOAA Chemical Sciences Laboratory
325 Broadway, R/CSL5
Boulder, CO 80305 USA




Dr. Assaf is a research scientist at the Cooperative Institute for Research in Environmental Sciences (CIRES) and an affiliate with the NOAA Chemical Sciences Laboratory. His current research at NOAA focuses on gas phase chemistry of peroxy radical RO2 in the marine environment, in particular the oxidation of dimethyl sulfide in low NOX environment. A pulsed laser photolysis flow-tube reactor coupled to a high-resolution time-of-flight chemical-ionization mass spectrometer (HR-ToF-CIMS) detection has been developed and operated for gas phase laboratory kinetic studies. Measurement of rate coefficients, identification and measurement of the yields of reaction products are carried out for a better understanding of reaction mechanisms.


Ph.D. Atmospheric Chemistry, University of Lille 1, France, 2017
Master's Degree Chemistry, University of Lille 1, France, 2014


Atmospheric chemistry, Chemical kinetics, Photochemistry

Current Topics

  • Atmospheric fate of CH3SCH2O2 peroxy radical, either by Hydrogen-shift leading to the formation of hydroperoxymethyl thioformate (HPMTF), or by bimolecular reactions with NO, HO2 and RO2 radicals.
  • The photochemical fate of HPMTF by measuring its UV and infrared absorption spectra and the photolysis quantum yields and stable end-product yields following its 248 nm pulsed laser photolysis.
  • HPMTF aqueous solubility
Cooperative Institute for Research in Environmental Sciences National Oceanic and Atmospheric Administration

last modified: January 22, 2021