Chemiluminescence Abbreviated Light Sticks -- the same reaction provides the energy

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Presentation transcript:

Chemiluminescence Abbreviated

Light Sticks -- the same reaction provides the energy

Engineering the Light Stick:

Energy Profile - Light Stick Dye (Ground State) Ea + H 2 O CO 2 Dye* (Excited State) Ea Heat of Reaction Is Exothermic (∆H) < 0 Excited State of Dye* Returns to Ground State And Emits Light Photon

Energy Profile - Light Stick Dye (Ground State) Ea + H 2 O CO 2 Dye* (Excited State) Ea Heat of Reaction Is Exothermic (∆H) < 0 Excited State of Dye* Returns to Ground State And Emits Light Photon

Light Sticks -- Different dyes are used to get different colors of light Green Blue

Green Fluorescent Dye: 9,10-Bis(phenylethynyl)anthracene

Blue Fluorescent Dye: 9,10-Diphenylanthracene

Firefly Luciferin

Firefly Oxyluciferin