science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: carbonyl fluoride				Other Names: carbonyl difluoride, fluorphosgene

Formula: COF2						CAS-No.: 353-50-4

Study: photolysis, quantum yields

                
Authors: A. Noelle, C. Krumscheid, H. Heydtmann

Title: Determination of quantum yields in the UV photolysis of COF2 and COFCl

Journal/Source: Chem. Phys. Lett., 299, 561-565, (1999); doi:10.1016/S0009-2614(98)01257-3 


Data: table

Energy/Wavelength range: 193 nm, 210 nm, 220 nm

Resolution: 

Temperature: 298 K

Temperature dependence: no

Pressure/Concentration: 2.1 - 6.3 mbar

Phase: gas

pH:


Comments: The following apparent quantum yields for pure COF2 were calculated from product analysis: PHI'(193 nm) = 0.47±0.03, 
PHI'(210 nm) = 0.57±0.05, and PHI'(220 nm) = 0.11±0.02. It is argued that, in the case of the laser pulse photolysis at 193 nm, the 
quantum yield of the elementary photolysis step is double the apparent quantum yield since COF2 is formed from COF radicals: 
PHI(193 nm) = 0.94±0.06.

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