Azobenzene (AB) is a diazene derivative where both hydrogens are replaced by phenyl groups. Under irradiation with UV light, it undergoes ultrafast trans→cis isomerization; the inverse cis→trans isomerization can be driven by light or occurs thermally in dark. AB photochromic properties enable its application as a light triggered switch in numerous molecular devices and functional materials [1]. Here we use femtosecond pump-probe and two-dimensional electronic spectroscopy in the UV range (2DUV) with sub-20-fs time resolution, combined with ab initio quantum mechanics simulations, to study the initial dynamics of trans-AB isomerization with unprecedented mechanistic detail.

Tracking azobenzene photoisomerization with sub-20-fs UV pulses

Nenov, Artur;Conti, Irene;Segarra-Marti, Javier;Garavelli, Marco;
2017

Abstract

Azobenzene (AB) is a diazene derivative where both hydrogens are replaced by phenyl groups. Under irradiation with UV light, it undergoes ultrafast trans→cis isomerization; the inverse cis→trans isomerization can be driven by light or occurs thermally in dark. AB photochromic properties enable its application as a light triggered switch in numerous molecular devices and functional materials [1]. Here we use femtosecond pump-probe and two-dimensional electronic spectroscopy in the UV range (2DUV) with sub-20-fs time resolution, combined with ab initio quantum mechanics simulations, to study the initial dynamics of trans-AB isomerization with unprecedented mechanistic detail.
2017
European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
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Borrego-Varillas, Rocio ;Nenov, Artur ; Oriana, Aurelio; Ganzer, Lucia ; Omachi Junko;Conti, Irene ;Segarra-Marti, Javier ;Manzoni, Cristian ;Garavelli, Marco ;Cerullo, Giulio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/674506
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