Synthesis and properties of novel chemiluminescent biological probes: 2- and 3-(2-Succinimidyloxycarbonylethyl)phenyl acridinium esters

Five new chemiluminescent aryl acridiniumcarboxylate esters 6–10, with a linker group in an ortho- or meta-position of the phenoxy ring, have been synthesized. The ortho- derivatives 6, 7 and 9 show significant improvement in the quantum yield of chemiluminescence and slower chemiluminescence kinetics compared to the unsubstituted para- derivative, 1, while the ortho- derivative 8 shows quicker chemiluminescence kinetics and a lower quantum yield of chemiluminescence. The meta- derivative 10 shows similar chemiluminescent properties to that of its para-substituted analogue.