6533b839fe1ef96bd12a6e36

RESEARCH PRODUCT

Temperature and light sensitive copolymers containing azobenzene moieties prepared via a polymer analogous reaction

Florian D. JochumPatrick Theato

subject

chemistry.chemical_classificationAzo compoundPolymers and PlasticsPhotoisomerizationOrganic ChemistryPolymerLower critical solution temperatureCis trans isomerizationchemistry.chemical_compoundchemistryAzobenzenePolymer chemistryMaterials ChemistryCopolymerIsomerization

description

Abstract Four different series of polyacrylamides containing different amounts of azobenzene moieties have been synthesized via a polymer analogous reaction of poly(pentafluorophenylacrylate) (PPFPA). All copolymers were designed to exhibit a lower critical solution temperature (LCST) in aqueous solution, which was dependent on (i) the amount of incorporated chromophoric azobenzene groups and (ii) the isomerization state of the respective azobenzene group. Higher LCST values were measured for UV-irradiated solutions of the copolymers in comparison to the non-irradiated copolymer solutions. A maximum difference in the LCST of up to 7 °C was found for the copolymer poly(N,N-dimethylacrylamide) containing 8.5 mol% of azobenzene groups. Within this temperature range, a reversible solubility change of the copolymer could be induced by irradiation with light.

yearjournalcountryeditionlanguage
2009-07-01Polymer
https://doi.org/10.1016/j.polymer.2009.05.041