Work

Synthesis and characterization of new push-pull azobenzene. Cis → Trans isomerization kinetic study

Year: 2025

Type: article

Abstract: Twelve new azobenzene molecules substituted with a wide range of electron donor and acceptor groups in the 4,4′-position have been synthesized. The attractive and donative strengths of these groups are proportional to the molecular dipole moment calculated by DFT. UV–visible spectroscopy showed that the increase in the push-pull effect induced a bathochromic shift in the maximum absorption wavelength from 350 nm to 480 nm. The trans → cis and cis → trans photo-isomerizations of the twelve compounds were verified. The thermal isomerization cis → trans was defined by a t 1/2 corresponding to the half-time reappearance time of the trans isomer after irradiation. These t 1/2 also depend on the strength of the electron acceptor and electron donor and vary from several days to 5 min for oxygenated compounds and from 220 min to 9 ms for tertiary amine compounds.

Source: Dyes and Pigments

DOI: 10.1016/j.dyepig.2025.112774

Authors: Gaspard Bichot, Xavier Sallenave, Rémi Métivier, Sébastien Péralta

Institutions: CY Cergy Paris Université, École Normale Supérieure Paris-Saclay, Centre National de la Recherche Scientifique, Université Paris-Saclay

Language: English

Topic: Photochromic and Fluorescence Chemistry

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,590

OpenAlex ID: W4408612178

FWCI: 1.696

Cites: 44

Cited by: 8

Related to: 10