Chlorophyll Fluorescence

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

概述

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.

日常示例

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

工业重要性

叶绿素荧光测量(PAM荧光法)用于农业、林业和生态学,以评估植物健康和胁迫状况。

属性

类型
Photochemical
可逆
是
能量
放热

相关反应

Photochemical Smog Formation (NO₂ Photolysis) Photochromism of Spiropyran Photodegradation of Methylene Blue by TiO₂ Photodissociation of Chlorine Gas Silver Bromide Photodecomposition Cis-Trans Isomerization of Retinal Photosynthesis Ozone Formation by UV Light Silver Chloride Photodecomposition Dye-Sensitized Solar Cell (Grätzel Cell)

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).