Atom transfer radical polymerization synthesis and photoresponsive solution behavior of spiropyran end-functionalized polymers as simplistic molecular probes
activation ΔS± for the transition process in the higher molecular weight polymer. This suggests an energetically unfavorable nonpolar environment of the BMC group in the higher molecular weight polymers, although a higher solvation of the BMC in the lower molecular weight polymer contributes to its stabilization. The ability of the BMC polymer end‐groups to organize was shown in metal ion‐binding experiments
There is provided a photochromic polymer for use in a polymeric composition comprising at least one photochromic moiety and at least one substituent comprising a gas barrier polymer selected from the group consisting of polymers of vinyl monomers of chemical formula CH2=CXY wherein at least one of X and Y is selected from the group consisting of hydroxyl, acetyl, nitrile and chlorine and the other is selected from the group consisting of hydrogen and chlorine and copolymers of said monomer; polyesters and copolymers thereof; and polyamides and copolymers thereof.
Synthesis of Amphiphilic Copolymers Bearing a Spirobenzopyran Moiety at the End Group and Their Photoresponsive Micellar Behaviors in Water
Novel photoresponsive amphiphilic copolymers, polymethoxy[oligo(ethylene glycol)] methacrylate-co-styrene}, were synthesized using a spirobenzopyran initiator by atom transfer radical polymerization. The spiropyran and merocyanine forms of the spirobenzopyran moiety at the end group successfully underwent photoisomerization under the conditions of micelle formation, which resulted in a drastic change in micellar properties, e.g., in the assembly state and the hydrophobic environment.