Quimioluminiscencia del luminol

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

Descripción general

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.

Participantes

Rol Sustancia Coeficiente Estado
Reactivo Peróxido de hidrógeno H₂O₂ 1 (aq)

Ejemplo cotidiano

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

Importancia industrial

El luminol se usa en ciencias forenses, química analítica, monitoreo ambiental e investigación biológica para detectar hierro, sangre oculta y compuestos oxidantes a bajas concentraciones.

Preguntas frecuentes

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