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

Substance: dichlorine monoxide				Other Names: 

Formula: Cl2O						CAS-No.: 7791-21-1

Study: photolysis, quantum yields, absorption cross sections

                
Authors: D.K. Papanastasiou, K.J. Feierabend, J.B. Burkholder

Title: Cl2O photochemistry: Ultraviolet/vis absorption spectrum temperature dependence and O(3P) quantum yield at 193 and 248 nm

Journal/Source: J. Chem. Phys., 134, 204310, (2011); doi:10.1063/1.3592662


Data: table, diagram

Energy/Wavelength range: 200 - 500 nm; 193 nm and 248 nm

Resolution: ~ 1 nm

Temperature: 201 - 296 K

Temperature dependence: yes

Pressure/Concentration: 17 and 28 Torr, N2

Phase: gas

pH:


Comments: The Cl2O UV/vis absorption spectrum was measured over the temperature range 201-296 K between 200 and 500 nm using 
diode array spectroscopy. Cl2O absorption cross sections, sigma Cl2O(lambda,T), at temperatures < 296 K were determined relative to 
its well established room temperature values.
O(3P) quantum yields were measured to be 0.85 ± 0.15 for 193 nm photolysis at 296 K and 0.20 ± 0.03 at 248 nm, which was also found 
to be independent of temperature (220-352 K) and pressure (17 and 28 Torr, N2).

Author to whom correspondence should be addressed: (e-mail address): digital data provided by J.B. Burkholder