Gas-phase absorption cross sections of 2-nitrobenzaldehyde and benzaldehyde in the 285-400 nm region, and photolysis of 2-nitrobenzaldehyde vapor at 308 and 351 nm

作者：Xiang Bin; Zhu Chengzhu; Zhu Lei^*

来源：Chemical Physics Letters, 2009, 474(1-3): 74-78.

DOI：10.1016/j.cplett.2009.04.056

We have measured the gas-phase absorption cross sections of 2-nitrobenzaldehyde and benzaldehyde in the 285-400 nm region by using cavity ring-down spectroscopy (CRD). Absorption cross sections of 2-nitrobenzaldehyde vapor at 290 and 400 nm are 10.7-fold and 5.5-fold lower than 2-nitrobenzaldehyde aqueous-phase cross section values. The HCO and the NO(2) product channels, after 308 and 351 nm photolysis of 2-nitrobenzaldehyde vapor, were examined. Neither HCO nor NO(2) was detected. Upper limits for the HCO and NO(2) quantum yields are <= 2.2% and <= 6.4% at 308 nm, respectively. Preliminary end-product study indicates that 2-nitrobenzaldehyde photodissociates at 308 nm but not at 351 nm.

• 出版日期2009-5-25