Luminol Chemiluminescence

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

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Chất phản ứng	Hydrogen Peroxide H₂O₂	1	(aq)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

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

Tính chất

Loại: Photochemical
Thuận nghịch: Không
Năng lượng: Tỏa nhiệt
ΔH: -300,0 kJ/mol
Chất xúc tác: Fe²⁺ (from hemoglobin)

Phản ứng liên quan

Cis-Trans Isomerization of Retinal Silver Chloride Photodecomposition Firefly Bioluminescence (Luciferin Oxidation) Photolysis of Water (Vacuum UV) Photochemical Smog Formation (NO₂ Photolysis) Photodegradation of Methylene Blue by TiO₂ Photodissociation of Chlorine Gas Silver Bromide Photodecomposition Photosynthesis Chlorophyll Fluorescence

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)).