The Gas-phase Ozonolysis of 1-Penten-3-ol, (Z)-2-Penten-1-ol and 1-Penten-3-one: Kinetics, Products and Secondary Organic Aerosol Formation

The gas phase ozonolysis of the biogenic unsaturated compounds 1 penten 3 ol (Z) 2 penten 1 ol and I penten 3 one has been investigated in two atmospheric simulation chambers The following rate coefficients (in units of 10(-17) cm(3) molecule(-1) s(-1)) were determined at atmospheric pressure and 293 +/- 2 K using an absolute rate method 1 penten 3 ol (1 64 +/- 0 15) (Z) 2 penten 1 ol (11 5 +/- 0 66) 1 penten 3 one (1 17 +/- 0 15) Reaction products were identified by in situ FTIR spectroscopy and gas chromatography - mass spectrometry (GC MS) The major products and their average molar yields in the presence of a radical scavenger at relative humidity < 1% were formaldehyde (0 49 +/- 0 02) 2 hydroxybutanal (0 46 +/- 0 03) and propanal (0 15 +/- 0 02) from 1 penten 3 ol propanal (0 39 +/- 0 03) and glycolaldehyde (0 43 +/- 0 04) from (Z) 2 penten 1 ol formaldehyde (0 37 +/- 0 02) and 2 oxobutanal (049 +/- 0 03) from 1 penten 3 one The formation of secondary organic aerosol was also observed with yields ranging from 0 13-0 17 for the unsaturated alcohols Significantly lower yields of around 0 03 were measured for 1 penten 3 one The results of this work are used to determine atmospheric lifetimes and reaction mechanisms for the gas phase ozonolysis of 1 penten 3 ol (Z) 2 penten 1 ol and 1 penten 3 one The broader atmospheric implications of this work are also discussed