From Ligand Field Theory to Molecular Collision Dynamics: A Common Thread of Angular Momentum

摘要: Interest in, and appreciation of, the role played by angular momentum in chemical physics was first aroused a Carl Ballhausen lecture early author’s scientific career. Later came deeper understanding of fundamental nature power its formal algebraic expression. Spectroscopy using light precisely defined energy (z-component of) represents unique experimental probe with potential to reveal underlying processes. Experiments circularly polarised emission gas phase molecules led new insights field molecular collision dynamics. Further work, that others, suggested an alternative formulation mechanics bimolecular collisions. A theoretical model developed guided throughout experiment. Its basis is linear-to-angular conversion within constraint state-to-state conservation. An evolutionary process experiment described, illustrations demonstrate theory collisions author co-workers. Examples include very recent work on multicollision models ensembles value e.g., modelling planetary atmospheres.