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。
特性
- タイプ
- Photochemical
- 可逆的
- いいえ
- エネルギー
- 発熱性
- ΔH
- -300.0 kJ/mol
- 触媒
- Fe²⁺ (from hemoglobin)
関連する反応
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)).