EXCIPLEXES

摘要

Compounds capable of forming an intramolecular exciplex on photoirradiation of the compound in water comprise two exciplex forming partners, one being a donor moiety and the other an acceptor moiety, each having at least one aromatic nucleus and being connected by a saturated aliphatic chain having t he flexibility to allow said partners to come into exciplex forming relationshi p. The compounds may be used as labels for oligonucleotides. Certain of the compounds display pH sensitive emission.