1989
DOI: 10.1021/cr00098a012
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Photochemistry of azobenzene-containing polymers

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Cited by 1,318 publications
(927 citation statements)
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“…These new absorption bands can be assigned to the p-p* and n-p* electronic transitions of the azobenzene chromophore. 1,11,12 Under 365 nm irradiation the intensity of the p-p* absorption band gradually decreased with the irradiation time, while that of the n-p* absorption band increased. Simultaneously, the absorption maximum of p-p* band is slightly shifted to shorter wavelengths because the molecular conjugation decreases when the cis content increases.…”
Section: Photoisomerization Of 4-(n-maleimido)azobenzene Molecules Inmentioning
confidence: 96%
See 1 more Smart Citation
“…These new absorption bands can be assigned to the p-p* and n-p* electronic transitions of the azobenzene chromophore. 1,11,12 Under 365 nm irradiation the intensity of the p-p* absorption band gradually decreased with the irradiation time, while that of the n-p* absorption band increased. Simultaneously, the absorption maximum of p-p* band is slightly shifted to shorter wavelengths because the molecular conjugation decreases when the cis content increases.…”
Section: Photoisomerization Of 4-(n-maleimido)azobenzene Molecules Inmentioning
confidence: 96%
“…During the trans-cis-trans isomerization processes significant changes of properties like the radiation absorption, molecular dimensions and dipole moment occur. 1,11,12 The incorporation of photochromic moieties in solid polymers has been explored in order to obtain new photoresponsive materials and optical devices. Several approaches were used to insert azobenzene chromophores into polymer matrices: randomly incorporation (guest-host structures), binding to main or side chains, or formation of thin-layer structures like Langmuir-Blodgett films.…”
Section: Introductionmentioning
confidence: 99%
“…We assign the initial absorption around 450 nm to the π -π * transition of the transconformation of the amine-terminated azobenzene and the absorption appearing at 552 nm to the n-π * transition of the photoinduced cis-conformation. Thermal isomerism from the photogenerated cis-to the trans-conformer occurs after heating at 60°C within seconds [10]. Obviously there is a strong electronic coupling between the HBC, the alkyne and the azobenzene, since the excitation of the former switches the latter.…”
Section: Optical Switching In Solutionmentioning
confidence: 99%
“…Light-induced switching of a dipole moment at the interface should allow for a better controlled switching. A suitable candidate is azobenzene, which can be switched optically and electrically from a trans-to a cisconformation [10][11][12][13], accompanied by a change in dipole moment.…”
Section: Introductionmentioning
confidence: 99%
“…Moreover, azobenzene-terminated polymers have been applied to photochromic probes [37,38] due to their unique optical trans-cis-trans isomerization [39][40][41]. Crostoam Peptu et al [42] prepared well defined poly(ε-caprolactone) (PCL) and polylactide (PLA) end capped with azobenzene by noncatalyzed ring-opening polymerization in the presence of Disperse Red 1 (DR1).…”
Section: Introductionmentioning
confidence: 99%