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 the flexibility to allow said partners to come into exciplex forming relationship. The compounds may be used as labels for oligonucleotides. Certain of the compounds display pH sensitive emission.
在
水中光照条件下能够形成分子内激发态络合物的化合物包括两个激发态络合物形成合作伙伴,一个是给体基团,另一个是受体基团,每个基团至少具有一个芳香环,并通过具有足够柔韧性的饱和脂肪链连接,使这些合作伙伴能够形成激发态络合物关系。这些化合物可用作寡核苷酸的标记。其中一些化合物显示出pH敏感的发射特性。