Photoisomerization of Azobenzene

trans-Azobenzene → cis-Azobenzene

Descripción general

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.

Ejemplo cotidiano

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

Importancia industrial

Aplicado en motores moleculares, actuadores fotosensibles, liberación controlada de fármacos y cristales líquidos fotoactivos.

Propiedades

Tipo: Photochemical
Reversible: Sí
Energía: Endotérmico
ΔH: 50,0 kJ/mol

Reacciones relacionadas

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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.