Reaction of O(1D) with CO2 at Low Temperatures

When O3 dispersed in a solid CO2 matrix, or a mixture of O3 and CO2 dispersed in solid argon is photolyzed using ultraviolet light, O3 disappears and a new substance forms. This substance shows infrared-absorption maxima at 2053, 1894, 1070, 975, and 564 cm−1. These absorption bands are ascribed to CO3. The molecule CO3 is capable of reacting with O2 to form O3. Experiments using 18O-labeled CO2 show that the oxygen in O3 formed by the reaction of O2 with CO3 is in part derived from the CO2.