An abnormal phenomenon on O2(a1Δ) deactivation by deuterated alcohols

The deactivation rate constants (kΔ) of O2(a1Δ) by several gaseous alcohols were measured using a quasi-static method. The results indicate that the gaseous kΔ values for normal alcohols are smaller than their corresponding liquid-phase data, well consistent with Schmidt’s model. However, for deuterated alcohols, an abnormal phenomenon that their gaseous kΔ values are evidently larger than their corresponding liquid-phase data was first observed. It is likely related to the O–D bonds in their molecules which can form more stable liquid-phase clusters via intermolecular hydrogen bonds and exhibit different vibrational constants in gas and liquid phase.