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

Substance: dibromodifluoromethane			Other Names: methane, dibromodifluoro-

Formula: CF2Br2						CAS-No.: 75-61-6

Study: photolysis, quantum yields


Authors: R.K. Talukdar, M. Hunter, R.F. Warren, J.B. Burkholder, A.R. Ravishankara

Title: UV laser photodissociation of CF2ClBr and CF2Br2 at 298 K: quantum yields of Cl, Br, and CF2 

Journal/Source: Chem. Phys. Lett., 262, 669-674, (1996), doi:10.1016/S0009-2614(96)01157-8


Data: 

Energy/Wavelength range: 193 nm; 222 nm; 248 nm

Resolution: 

Temperature: 

Temperature dependence: 

Pressure/Concentration:

Phase:

pH:


Comments: In the photodissociation of CF2ClBr, the quantum yields for Cl atom production were measured to 
be 1.03 ± 0.14, 0.27 ± 0.04, and 0.18 ± 0.03, respectively, at 193, 222, and 248 nm, while those for Br atom 
were 1.04 ± 0.13 at 193 nm, 0.86 ± 0.11 at 222 nm, and 0.75 ± 0.13 at 248 nm. 
The CF2 quantum yields in 193 nm photolysis were measured to be 1.15 ± 0.30 for CF2Br2 and 0.91 ± 0.30 for CF2ClBr.

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