Abstract
We report the reversible photoinduced self-assembly of a diblock copolymer in a typical hydrophobic ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate ([C4mim]PF6). A series of random copolymers consisting of 4-phenylazophenyl methacrylate and N-isopropylacrylamide (P(AzoMA-r-NIPAm)) show both photoresponsive solubility changes and upper critical solution temperature (UCST) phase transitions in [C4mim]PF6. The UCST phase transition temperature of the random copolymer depends strongly on the composition of AzoMA as well as on the photoisomerization state of the azobenzene moiety. The phase transition temperature of P(trans-AzoMA-r-NIPAm) in the dark is lower than that of P(cis-AzoMA-r-NIPAm) under UV-light irradiation. Reversible solubility changes by changing the wavelength of incident light were demonstrated by using the difference between the phase transition temperatures. On the basis of the results, we apply the thermo- and photoresponsive property of the random copolymer to a block copolym...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
