Site and bond-specific dynamics of reactions at the gas-liquid interface

摘要: The dynamics of the interfacial reactions O(3P) with hydrocarbon liquids squalane (C30H62, 2,6,10,15,19,23-hexamethyltetracosane) and squalene (C30H50, trans-2,6,10,15,19,23-hexamethyltetracosa-2,6,10,14,18,22-hexaene) have been studied experimentally. Laser-induced fluorescence (LIF) was used to detect nascent gas-phase OH products. atoms are acutely sensitive chemical differences surfaces. larger exothermicity abstraction from allylic C–H sites in is reflected markedly hotter rotational vibrational distributions. There a more modest increase translational energy release. A fraction available deposited liquid for than squalane, consistent extensive geometry change on formation radical co-product. Although dominant reaction mechanism direct, impulsive scattering, there some evidence being accommodated at both surfaces, resulting thermalised translation Despite H-abstraction strongly favoured energetically squalene, yield substantially lower squalane. This very likely due competitive addition unsaturated implying that double bonds extensively exposed surface.