Luminol Chemiluminescence

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

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Hydrogen Peroxide H₂O₂ 1 (aq)

일상 속 예시

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

산업적 중요성

법의학에서 희석된 혈흔(헤모글로빈의 철 이온 촉매)을 검출하는 혈흔 감별 시약으로 사용됩니다. 생의학 분야의 화학발광 면역 분석(CLIA)에도 활용됩니다.

성질

유형
Photochemical
가역 반응
아니오
에너지
발열
ΔH
-300.0 kJ/mol
촉매
Fe²⁺ (from hemoglobin)

관련 반응

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)).