External Heavy‐Atom Spin—Orbital Coupling Effect. V. Absorption Studies of Triplet States

摘要: The lowest energy T1←S0 transitions of the molecules chlorobenzene, 1‐chloronaphthalene, anthracene, 9,10‐dichloroanthracene, 9,10‐dibromoanthracene, naphthacene, pyridine, and phenazine have been investigated in a variety solvents, some which contain atoms large atomic number (henceforth called ``heavy atoms''). It is shown that heavy‐atom solvents an increase absorptivity occurs, technique external perturbation demonstrated as method conveniently locating validating transitions. Monitoring experiments nonspin‐intercombination transitions, such S1←S0 molecule being investigated, low‐level contaminants subjected to perturbation, permitted conclusion unique for further verified effect spin‐orbital nature. Much new data on triplet‐state energies lifetime...