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Substance: acetone				Other Names: 2-propanone

Formula: CH3COCH3				CAS-No.: 67-64-1

Study: photolysis, quantum yields


Authors: H. Somnitz, T. Ufer,  R. Zellner

Title: Acetone photolysis at 248 nm revisited: pressure dependence of the CO and CO2 quantum yields

Journal/Source: Phys. Chem. Chem. Phys., 11, 8522-8531, (2009); DOI: 10.1039/B906751E


Data: (diagram, table, disk):

Energy/Wavelength range: 248 nm

Resolution: 

Temperature: 298 K

Temperature dependence: no

Pressure/Concentration: 50 - 900 mbar

Phase (gas, liquid, solid): 


Comments: Pressure dependent CO and CO2 quantum yields in the laser pulse photolysis of acetone at 248 nm and T = 298 K have been measured 
directly using quantitative infrared diode laser absorption.
The quantum yields show a significant dependence on total pressure, with PHI(CO) decreasing from around 0.5 at 20 mbar to approximately 0.3 at 900 mbar. 

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