alkene photoisomerization
Photochemical process with geometrical isomerization of a carbon–carbon double bond.
Notes:
  1. Geometrical isomerization of a C–C double bond is called a cis/transisomerization in 1,2-disubstituted alkenes. E/Zisomerization is a more general designation applying also to higher substituted alkenes.
  2. This process leads to a photostationary state if both isomers absorb light under the reaction conditions.
Source:
PAC, 2007, 79, 293 (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 302