Luminol Chemiluminescence

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

概要

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.

参加者

役割 物質 係数 状態
反応物 Hydrogen Peroxide H₂O₂ 1 (aq)

日常の例

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

産業上の重要性

ルミノールは法科学、分析化学、環境モニタリング、生物医学研究に利用される。ATPバイオルミネッセンスアッセイによる大腸菌汚染検出(食品安全)や癌治療効果のモニタリングにも応用される。

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)).