exciplex

https://doi.org/10.1351/goldbook.E02246
An electronically excited complex of definite @S06026@, 'non-bonding' in the @G02704@. For example, a complex formed by the interaction of an excited @M03986@ with a @G02704@ counterpart of a different structure.
See also:
excimer
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1114 [Terms] [Paper]