Luminol Chemiluminescence

C8H7N3O2 + H2O2 → 3-aminophthalate + N2 + hν (blue light)

Ikhtisar

Luminol reacts with hydrogen peroxide in the presence of a catalyst (typically iron from hemoglobin in blood) to produce 3-aminophthalate in an excited electronic state. As the molecule relaxes, it emits blue light (425 nm). The iron in blood catalyzes this reaction, making it a powerful forensic tool.

Peserta

Peran Zat Koefisien Keadaan
Reaktan Hydrogen Peroxide H₂O₂ 1 (aq)

Contoh Sehari-hari

Crime scene investigators spray luminol solutions in dark rooms to detect invisible bloodstains that glow blue.

Pentingnya dalam Industri

Luminol is used in forensic science, analytical chemistry, environmental monitoring, and biological research for detecting trace metals and reactive oxygen species.

Sifat

Jenis
Photochemical
Dapat Dibalik
Tidak
Energi
Eksoterm
ΔH
-300,0 kJ/mol
Katalis
Fe²⁺ (from hemoglobin)

Reaksi Terkait

Photochemical Smog Formation (NO₂ Photolysis) Photochromism of Spiropyran Chlorophyll Fluorescence Photodegradation of Methylene Blue by TiO₂ Photodissociation of Chlorine Gas Silver Bromide Photodecomposition Cis-Trans Isomerization of Retinal Photosynthesis Ozone Formation by UV Light Dye-Sensitized Solar Cell (Grätzel Cell)

Frequently Asked Questions

What is the equation for Luminol Chemiluminescence?
The balanced equation is: C₈H₇N₃O₂ + H₂O₂ → 3-aminophthalate + N₂ + hν (blue light).
What type of reaction is Luminol Chemiluminescence?
Luminol Chemiluminescence is a photochemical reaction.
Is Luminol Chemiluminescence exothermic or endothermic?
Luminol Chemiluminescence is exothermic (releases energy). The enthalpy change (ΔH) is -300.0 kJ/mol.
What conditions are needed for Luminol Chemiluminescence?
This reaction requires a catalyst (Fe²⁺ (from hemoglobin)).