one-photon photochromism

https://doi.org/10.1351/goldbook.OT07433
Photochromic process involving a one-photon mechanism. In this case, the photoproduct B is formed from the singlet or from the
triplet state
of the thermodynamically-
stable
molecular entity A.
Source:
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 377 [Terms] [Paper]