The photochemistry in adsorbed molecules is drastically different from that of gaseous ones. Seven channels of KrF laser-induced dissociation of chlorobenzene condensed on silica have been found using mass spectrometry. They include the multiple photon detachment of H and Cl atoms and the opening of the aromatic ring. A general approach is proposed for adlayer photolysis based on the excitation of molecules into repulsive electronic states when bonds are stretched. It consists of the multiphoton transition of molecules into high vibrational levels in the vibronic continuum, bond elongation, and stimulated photoemission. Secondary processes in desorbed fragments were also studied.

吸附分子中的光化学与气体分子中的光化学有很大不同。使用质谱法已经发现了KrF激光诱导的在硅胶上冷凝的氯苯解离的七个通道。它们包括H和Cl原子的多个光子脱离以及芳环的开放。提出了一种基于分子在键被拉伸时激发成排斥电子态的吸附剂光解的通用方法。它由分子的多光子跃迁到电子振动连续体中的高振动水平，键伸长和受激光发射组成。还研究了解吸碎片中的二级过程。