The copolymerization of dibenzofuran(DBF)and 3-methylthiophene(MET)was successfully achieved electrochemically by direct anodic oxidation of the monomer mixtures in boron trifluoride diethyl etherate.The effects of ap...The copolymerization of dibenzofuran(DBF)and 3-methylthiophene(MET)was successfully achieved electrochemically by direct anodic oxidation of the monomer mixtures in boron trifluoride diethyl etherate.The effects of applied polymerization potential and the monomer concentration ratios on the copolymerization were investigated by linear sweep voltammetry and cyclic voltammetry(CV).The structure of copolymer films were investigated by UV-Vis,infrared spectroscopy,thermal analysis.As-formed novel copolymers own...展开更多
The electrochemical copolymerization of aniline and N,N,N'-trimethylthionin (azure B) in aqueous solutions has been carried out using the potential sweep method. The optimum conditions for the coelectrodeposition ...The electrochemical copolymerization of aniline and N,N,N'-trimethylthionin (azure B) in aqueous solutions has been carried out using the potential sweep method. The optimum conditions for the coelectrodeposition are that the pH value and the temperature of the electrolytic solution are controlled at 5.57 and 30 degreesC, respectively, and the scan potential range is set between -0.25 and 1.10 V (versus SCE). The copolymerization rate of aniline and azure B is about 3 times larger than that of aniline in the absence of azure B. The copolymerization of aniline and azure B was verified from the results of visible spectra during electrolysis, FTIR spectra and the atomic force microscopy (AFM) images of the polymers. The in situ visible spectrum for the electrolysis of the solution containing aniline and azure B is different from that of the respective aniline and azure B. The FTIR spectrum of the copolymer is not a superposition of that of polyaniline and poly(azure B). The AFM image of the copolymer is different from those of polyaniline and poly(azure B) and is not a mixture of individual polymers. The conductivity of the copolymer synthesized at pH 5.57 is four orders of magnitude higher than that of polyaniline synthesized under the same conditions, but in the absence of azure B. The electrochemical properties of the copolymer are mainly attributed to polyaniline, but the copolymer has a better electrochemical reversibility and a much faster charge transfer than those of polyaniline.展开更多
Poly（benzanthrone-co-thiophene）, a new conducting copolymer, was successfully prepared by direct anodic oxidation of benzanthrone and thiophene （Th） in a binary solvent system containing boron trifluoride diethyl ...Poly（benzanthrone-co-thiophene）, a new conducting copolymer, was successfully prepared by direct anodic oxidation of benzanthrone and thiophene （Th） in a binary solvent system containing boron trifluoride diethyl etherate （BFEE） and acetonitrile （ACN）. The as-formed copolymer film electrodeposited with monomer feed ratio of benzanthrone/Th = 1：1 at the applied potential of 1.3 V versus Ag/AgCl exhibited the advantages of both polybenzanthrone and polythiophene, such as active electrochemical behavior, excellent thermal stability, relatively high electrical conductivity and mechanical properties. UV-Vis spectroscopy, 1H-NMR and SEM were used to characterize and investigate the structures and morphologies of the copolymers. Fluorescence spectroscopy studies revealed that the obtained copolymer films show strong emission at about 525 nm. Moreover, the emitting properties of the copolymers could be tuned by changing some parameters during the electropolymerization process, such as monomer feed ratio.展开更多
基金This work was financially supported by the Natural Science Foundation of China(Nos.50663001,20564001)Ministry of Education(No.2007-207058).
文摘The copolymerization of dibenzofuran(DBF)and 3-methylthiophene(MET)was successfully achieved electrochemically by direct anodic oxidation of the monomer mixtures in boron trifluoride diethyl etherate.The effects of applied polymerization potential and the monomer concentration ratios on the copolymerization were investigated by linear sweep voltammetry and cyclic voltammetry(CV).The structure of copolymer films were investigated by UV-Vis,infrared spectroscopy,thermal analysis.As-formed novel copolymers own...
基金This work was supported by the National Natural Science Foundation of China (No. 20074027), the State Key Laboratory of Physical Chemistry of the Solid Surface at Xiamen University and the Laboratory of Organic Solids, Institute of Chemistry, Chinese Aca
文摘The electrochemical copolymerization of aniline and N,N,N'-trimethylthionin (azure B) in aqueous solutions has been carried out using the potential sweep method. The optimum conditions for the coelectrodeposition are that the pH value and the temperature of the electrolytic solution are controlled at 5.57 and 30 degreesC, respectively, and the scan potential range is set between -0.25 and 1.10 V (versus SCE). The copolymerization rate of aniline and azure B is about 3 times larger than that of aniline in the absence of azure B. The copolymerization of aniline and azure B was verified from the results of visible spectra during electrolysis, FTIR spectra and the atomic force microscopy (AFM) images of the polymers. The in situ visible spectrum for the electrolysis of the solution containing aniline and azure B is different from that of the respective aniline and azure B. The FTIR spectrum of the copolymer is not a superposition of that of polyaniline and poly(azure B). The AFM image of the copolymer is different from those of polyaniline and poly(azure B) and is not a mixture of individual polymers. The conductivity of the copolymer synthesized at pH 5.57 is four orders of magnitude higher than that of polyaniline synthesized under the same conditions, but in the absence of azure B. The electrochemical properties of the copolymer are mainly attributed to polyaniline, but the copolymer has a better electrochemical reversibility and a much faster charge transfer than those of polyaniline.
基金supported by the NSFC(Nos.50663001,50963002)the Key Scientific Project from Ministry of Education,Jiangxi Province Jinggang Star Project(2008)Jiangxi Provincial Department of Education(GJJ08369 and GJJ09574).
文摘Poly（benzanthrone-co-thiophene）, a new conducting copolymer, was successfully prepared by direct anodic oxidation of benzanthrone and thiophene （Th） in a binary solvent system containing boron trifluoride diethyl etherate （BFEE） and acetonitrile （ACN）. The as-formed copolymer film electrodeposited with monomer feed ratio of benzanthrone/Th = 1：1 at the applied potential of 1.3 V versus Ag/AgCl exhibited the advantages of both polybenzanthrone and polythiophene, such as active electrochemical behavior, excellent thermal stability, relatively high electrical conductivity and mechanical properties. UV-Vis spectroscopy, 1H-NMR and SEM were used to characterize and investigate the structures and morphologies of the copolymers. Fluorescence spectroscopy studies revealed that the obtained copolymer films show strong emission at about 525 nm. Moreover, the emitting properties of the copolymers could be tuned by changing some parameters during the electropolymerization process, such as monomer feed ratio.
