Peroxyoxalate

The emission is generated by the reaction of an oxalate ester with hydrogen peroxide in the presence of a suitably fluorescent energy acceptor.

Other aryl oxalates have been synthesized and evaluated with respect to their possible analytical applications.

[3] Peroxyoxalate CL is an example of indirect or sensitized chemiluminescence in which the energy from an excited intermediate is transferred to a suitable fluorescent molecule, which relaxes to the ground state by emitting a photon.

[6] It has been found, however, that the chemiluminescence intensity corrected for quantum yield decreases as the singlet excitation energy of the fluorescent molecule increases.

[7] This suggests the possibility of an electron transfer step in the mechanism, as demonstrated in several other chemiluminescence systems.