Originally, a diagram showing that the fluorescent state of a @[email protected] is the lowest @[email protected] from which the transition to the @[email protected] is allowed, whereas the phosphorescent state is a @[email protected] state below the fluorescent state, which is reached by @[email protected] In the most typical cases the fluorescent state is the lowest singlet @[email protected] and the phosphorescent state the lowest @[email protected], the @[email protected] being a singlet. Presently, modified Jablonski diagrams are frequently used and are actually state diagrams in which molecular electronic states, represented by horizontal lines displaced vertically to indicate relative energies, are grouped according to multiplicity into horizontally displaced columns. @[email protected] and @[email protected] processes that interconvert states are indicated in the diagram by arrows. Radiative transitions are generally indicated with straight arrows (→), while radiationless transitions are generally indicated with wavy arrows ⇝.
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2250 [Terms] [Paper]