The process by which a photochemical or photophysical alteration occurs in one molecular entity as a result of initial absorption of radiation by another molecular entity called a @P04653@. In mechanistic @P04588@ the term is limited to cases in which the @P04653@ is not consumed in the reaction.
energy transfer (in photochemistry)
PAC, 1981, 53, 753. (Symbolism and Terminology in Chemical Kinetics) on page 762 [Terms] [Paper]
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2265 [Terms] [Paper]