Several kinds of novel azobenzene-containing polyelectrolytes with special molecular design have been developed from acryloyl chloride or epoxy based precursor polymers. The acryloyl chloride based precursor polymer, ...Several kinds of novel azobenzene-containing polyelectrolytes with special molecular design have been developed from acryloyl chloride or epoxy based precursor polymers. The acryloyl chloride based precursor polymer, poly(acryloyl chloride), was prepared by free radical polymerization of acryloyl chloride. The azo polyelectrolytes were prepared by an esterification reaction between the precursor polymer and corresponding azo chromophores containing a reactive hydroxyl group, followed by hydrolysis of the unreacted acyl chloride groups. The epoxy based precursor polymer was prepared by the reaction between 1,4-cyclohexanedimethanol diglycidyl ether and aniline, and postfunctionalized by azo coupling reaction to form azo polymers containing chromophores with ionizable groups. The polyelectrolytes were characterized by elemental analysis, H-1-NMR, IR and UV-Vis spectroscopy. The photodynamic and photoresponsive properties, as well as self-assembly of these azo polyelectrolytes are reported in this paper([1]).展开更多
Photoresponsive behavior and self assembly properties of three side chain azo polyelectrolytes, poly (2 (4 phenylazophenoxy) ethanol co acrylic acid) (PPAPE), poly (2 (4 (4′ nitrophenylazo) phenoxy) ethanol...Photoresponsive behavior and self assembly properties of three side chain azo polyelectrolytes, poly (2 (4 phenylazophenoxy) ethanol co acrylic acid) (PPAPE), poly (2 (4 (4′ nitrophenylazo) phenoxy) ethanol co acrylic acid) (PNAPE), and poly (2 (4 (4′ ethoxyphenylazo) phenoxy) ethanol co acrylic acid) (PEAPE), were studied. These polyelectrolytes with different degrees of functionalization of azo chromophores were fabricated into nano composite multilayers using two types of dipping solutions through a layer by layer electrostatic self assembling process. Results show that the ratio between tetrahydrofuran (THF) and H 2O significantly influences the photoresponsive behavior of PNAPE in THF H 2O mixture. The THF H 2O dipping solution, used in this work for self assembly of hydrophobic polyelectrolytes, is proved to be as applicable as aqueous dipping solution for normal self assembly of hydrophobic polyelectrolytes. However, significant differences in the multilayer growth between the two systems were also observed, which resulted from the remarkable difference of the existing forms of the polyelectrolytes in these two dipping solutions.展开更多
基金This work was supported by National Natural Foundation of China (No. 59873013).
文摘Several kinds of novel azobenzene-containing polyelectrolytes with special molecular design have been developed from acryloyl chloride or epoxy based precursor polymers. The acryloyl chloride based precursor polymer, poly(acryloyl chloride), was prepared by free radical polymerization of acryloyl chloride. The azo polyelectrolytes were prepared by an esterification reaction between the precursor polymer and corresponding azo chromophores containing a reactive hydroxyl group, followed by hydrolysis of the unreacted acyl chloride groups. The epoxy based precursor polymer was prepared by the reaction between 1,4-cyclohexanedimethanol diglycidyl ether and aniline, and postfunctionalized by azo coupling reaction to form azo polymers containing chromophores with ionizable groups. The polyelectrolytes were characterized by elemental analysis, H-1-NMR, IR and UV-Vis spectroscopy. The photodynamic and photoresponsive properties, as well as self-assembly of these azo polyelectrolytes are reported in this paper([1]).
基金the National Natural Science Foundationof China(No.5 992 5 30 9)
文摘Photoresponsive behavior and self assembly properties of three side chain azo polyelectrolytes, poly (2 (4 phenylazophenoxy) ethanol co acrylic acid) (PPAPE), poly (2 (4 (4′ nitrophenylazo) phenoxy) ethanol co acrylic acid) (PNAPE), and poly (2 (4 (4′ ethoxyphenylazo) phenoxy) ethanol co acrylic acid) (PEAPE), were studied. These polyelectrolytes with different degrees of functionalization of azo chromophores were fabricated into nano composite multilayers using two types of dipping solutions through a layer by layer electrostatic self assembling process. Results show that the ratio between tetrahydrofuran (THF) and H 2O significantly influences the photoresponsive behavior of PNAPE in THF H 2O mixture. The THF H 2O dipping solution, used in this work for self assembly of hydrophobic polyelectrolytes, is proved to be as applicable as aqueous dipping solution for normal self assembly of hydrophobic polyelectrolytes. However, significant differences in the multilayer growth between the two systems were also observed, which resulted from the remarkable difference of the existing forms of the polyelectrolytes in these two dipping solutions.
