Lucigenin

Lucigenin is a chemiluminescent probe for the detection of superoxide in biological systems. It has been used for the generation of chemiluminescence in the presence of a reductant and oxygen. Lucigenin is also used as a fluorescent chloride-sensitive indicator, with fluorescence being quenched by chloride (excitation: 455 nm; emission: 505 nm). Lucigenin fluorescence is insensitive to phosphate, sulfate, and nitrate.