Chlorophyll Fluorescence

Chlorophyll + hν (blue/red) → Chlorophyll* → Chlorophyll + hν (red)

概要

Chlorophyll absorbs blue (430 nm) and red (660 nm) light, reaching an excited singlet state. Most energy is transferred to the photosynthetic reaction center, but a small fraction (1–2%) is re-emitted as red fluorescence (680–740 nm). This fluorescence is a direct indicator of photosynthetic efficiency.

日常の例

If you shine a UV light on a spinach extract, it glows red due to chlorophyll fluorescence — a common chemistry demonstration.

産業上の重要性

クロロフィル蛍光測定(PAMフルオロメトリー)は、植物の健康とストレスを評価するために農業、林業、生態学で使用されています。

特性

タイプ
Photochemical
可逆的
はい
エネルギー
発熱性

関連する反応

Silver Chloride Photodecomposition Luminol Chemiluminescence 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 Cis-Trans Isomerization of Retinal

Frequently Asked Questions

What is the equation for Chlorophyll Fluorescence?
The balanced equation is: Chlorophyll + hν (blue/red) → Chlorophyll* → Chlorophyll + hν (red).
What type of reaction is Chlorophyll Fluorescence?
Chlorophyll Fluorescence is a photochemical reaction. It is reversible under certain conditions.
Is Chlorophyll Fluorescence exothermic or endothermic?
Chlorophyll Fluorescence is exothermic (releases energy).