Energy Transfer in Luminol Type Chemiluminescence

Some discrepancies between the fluorescence spectrum of 3-aminophthalic acid and the luminol chemiluminescence spectrum are at least in part due to reabsorption of the shorter-wavelength emission by luminol monoanion [30]. 

YII3 Energy Transfer in Luminol Type Chemiluminescence 

The chemiluminescence of luminol is a direct chemiluminescence, i.e. the reaction product aminophthalate is the primary excited species. A series of compounds has been synthesized since 1967 in which the energy-generating hydrazide group and the light emitting group (a fluorescent residue) are separated [5, 36-38]. 

Typical examples are the N-methylacridone derivative (19), the carbazole-and benzocarbazole derivatives (20) and (21), in which the fluorescent, heterocyclic part of the molecule is linked with the phthalhydrazide structure via a bridging methylene group. 

A mesomeric interaction between the donor and the fluorescing (acceptor) part of the molecule is thus not possible. 

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