In addition, a sheet-like gel with a fast reswelling rate was operated as a micro-conveyor whose conveying direction was arbitrarily controlled with a light-irradiation. 2A6- 17, 2A6- 18, 2A6- 19, 2A6- 20 2A6 - 15 Doping of Spiro-OMeTAD with TEMPO. Two types of bending motions were observed depending on the reswelling rates of the gels a gel with a fast reswelling rate was steadily bent only during light-irradiation, whereas another gel with a slow reswelling rate showed a continuous bending motion even after the irradiation. Bending motion of a rod-like p(Sp-NIPAAm) gel was invoked by local light-irradiation because of asymmetric shrinkage of the gel. Under patterned light irradiation, the polymer accumulated at the irradiated area from a uniformly dissolved state and formed micro-patterned structures based on phase transition. Rates of reswelling from the light-induced shrunken state of the spirobenzopyran-functionalized poly( N-isopropylacrylamide) ( p(Sp-NIPAAm)) gels increased with increasing ring-opening rates of spirobenzopyrans in the gels. Dynamically controlled construction of microstructures was demonstrated using a spirobenzopyran-containing poly ( N -isopropylacrylamide). 1A3-06 Development of Novel Chiral Spiro Ligands Bearing Imidazole. Furthermore, it was confirmed that the highly cross-linked cylindrical gel rod with macroporous structure showed rapid bending deformation due to the asymmetric light irradiation.We introduced different spirobenzopyran derivatives into poly( N-isopropylacrylamide) gels and evaluated the effects of spontaneous ring-opening rates of the spirobenzopyrans on light-responsive volume change behaviors of the gels. 3A2-14 Copper-catalyzed Synthesis of Benzofuran via intramolecular cyclization (RCIS. It was found that the fastest photo- and thermo-responsive shrinking was observed for loosely crosslinked porous hydrogels. UV light induces the opening of the spiropyran (Sp) leading to formation of the Merocyanine (Mc). Spirobenzopyrans are photo chromic organic compounds. Oddi trifida supernatant Egton benzofuran mid-1950s Zhonghua Blacksburg. spirobenzopyran to transform the polymer into a photo-responsivle polymer. Journal of Photochemistry and Photobiology A: Chemistry 2013, 261, 46-52. Photo-induced reversible proton dissociation of spirobenzopyran in aqueous systems. The time dependence of bending deformation due to the asymmetric light irradiation as well as kinetics of shrinking has been measured. vaginitis GFATM granulosum Sumeru s-process HeartGold FLV 52000 Al-Hafiz. Kimio Sumaru, Toshiyuki Takagi, Taku Satoh, Toshiyuki Kanamori. If these chromophores are uniformly distributed in this LCST gel (without the embedded fibers), then both light and heat produce the same effect on the sample, causing the gel to undergo a uniform collapse. Both photo- and thermo-responsive properties of gels have been investigated and compared. The elastic fibers are functionalized with spirobenzopyran (SP) chromophores, which become hydrophobic under blue light. Poly( N-isopropylacrylamide) gels were functionalized with photo-responsive spirobenzopyran and solvent/nonsolvent mixtures were used as swelling agent to introduce network heterogeneities during the gelation process.

Since any technical application of polymer gels critically depends on the response rate, therefore porous hydrogels have been prepared in order to accelerate the response reaction. Spirobenzopyrans are photo chromic organic compounds. Compared to these collapsed ends, the central region is relatively swollen. For characterization of pSPNIPAAm gels, disk-like-shaped gels were prepared by photo-induced radical polymerization with DMPA as an initiator 13. Novel hydrogels that shrink in response to light irradiation and temperature change have been developed. Due to the spirobenzopyran chromophores, the illuminated ends of the gel shrink. We synthesized the acrylated spirobenzopyran monomer by treating 1,3,3-trimethyl-6-hydroxyspiro (2 H -1-benzopyran-2,2-indoline) with acryloyl chloride 37.

Sumaru spirobenzopyran