The UV absorption spectrum of dichlorine trioxide, Cl2O3 has been recorded in the wavelength range 220–340 nm and at 223 K using a recently developed flash photolysis–kinetic UV absorption spectroscopy apparatus. Cl2O3 was generated in the reaction between ClO and OClO following the partial photolysis of OClO. The spectrum obtained is smooth, and shows a peak at 267 nm, where σ= 1.76 × 10–17 cm2 molecule–1(base e). Results are broadly consistent with previous determinations of the spectrum, although we report higher cross-sections in the long-wavelength tail of the absorption. The discrepancies between these and previous measurements are discussed, together with the atmospheric implications of this work.
氯三氧化物 (
Cl2O3) 的紫外吸收光谱在220–340 nm的波长范围内,以及在223 K下,通过最近开发的闪光光解-动力学紫外吸收光谱仪记录。 是在ClO和OClO反应中生成的,伴随着OClO的部分光解。获得的光谱光滑,并在267 nm处显示出一个峰值,σ= 1.76 × 10–17 cm² 分子–1(以自然对数为底)。结果与之前的光谱测定大致一致,尽管我们报告了在吸收的长波尾部更高的截面值。这些与先前测量之间的差异进行了讨论,并且探讨了这项工作的气象意义。