Photoisomerization of Azobenzene

trans-Azobenzene → cis-Azobenzene

Обзор

UV light (340 nm) converts the thermodynamically stable trans isomer of azobenzene to the cis form through rotation around the N=N bond. Visible light (450 nm) or thermal relaxation converts it back. The large geometric change (9 Å to 5.5 Å end-to-end distance) makes azobenzene a versatile molecular switch.

Пример из жизни

Azobenzene-based molecular motors can move objects millions of times their own mass when triggered by light.

Промышленное значение

Azobenzene photoswitches are used in molecular machines, drug delivery systems, liquid crystal displays, and data storage research.

Свойства

Тип: Photochemical
Обратимая: Да
Энергия: Эндотермическая
ΔH: 50,0 kJ/mol

Связанные реакции

Cis-Trans Isomerization of Retinal 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 Chlorophyll Fluorescence

Frequently Asked Questions

What is the equation for Photoisomerization of Azobenzene?

The balanced equation is: trans-Azobenzene → cis-Azobenzene.

What type of reaction is Photoisomerization of Azobenzene?

Photoisomerization of Azobenzene is a photochemical reaction. It is reversible under certain conditions.

Is Photoisomerization of Azobenzene exothermic or endothermic?

Photoisomerization of Azobenzene is endothermic (absorbs energy). The enthalpy change (ΔH) is 50.0 kJ/mol.