A novel poly (amide-imide) was prepared from a novel monomer: 5,6-diphenyl-chloroformyl-3,4-benzenedicarboxylic anhydride and bis (4-aminophenyl) ether. The polymer was characterized by FTIR. (HNMR)-H-1. DSC and TGA.
Poly （3, 4-ethylenedioxythiophene） （PEDOT）, together with its dopes, such as poly （styrene sulfonate） （PSS）, has been acknowledged to have a wide range of biomedical applications as an important conducting pol...Poly （3, 4-ethylenedioxythiophene） （PEDOT）, together with its dopes, such as poly （styrene sulfonate） （PSS）, has been acknowledged to have a wide range of biomedical applications as an important conducting polymer. In this study, gelatin can be polymerized into PEDOT/PSS polymers on indium tin oxide （ITO）-coated glass. PEDOT/PSS/gelatin layer on ITO-coated glass significantly decreases electrochemical impedance spectroscopy （EIS） and increases charge delivery capacity relative to the gelatin layer and bare ITO- coated glass, comparable to the PEDOT/PSS layer on ITO-coated glass. PEDOT/PSS/gelatin layer on ITO- coated glass enhances pheochromocytoma （PC 12） cell affinity, possesses a high biocompatibility and promotes PC 12 cell growth by delivery of electrical stimulation. These results suggest that gelatin can be incorporated into the PEDOT/PSS polymers through electrochemical polymerization and the PEDOT/PSS/gelatin layer on ITO-coated glass possesses high electrochemical and biological activities.展开更多
An innovative,ternary nanocomposite composed of overoxidized poly(3,4-ethylenedioxythiophene)(OPEDOT),gold nanoparticles(Au NPs),and electrochemically reduced graphene oxide(ERGO)was prepared on a glassy carbon electr...An innovative,ternary nanocomposite composed of overoxidized poly(3,4-ethylenedioxythiophene)(OPEDOT),gold nanoparticles(Au NPs),and electrochemically reduced graphene oxide(ERGO)was prepared on a glassy carbon electrode(GCE)(OPEDOT-Au NPs-ERGO/GCE)through homogeneous chemical reactions and heterogeneous electrochemical methods.The morphology,composition,and structure of this nanocomposite were characterized by transmission electron microscopy,scanning electron microscopy,X-ray diffraction,and X-ray photoelectron spectroscopy.The electrochemical properties of the OPEDOT-Au NPs-ERGO/GCE were investigated by cyclic voltammetry using potassium ferricyanide and hexaammineruthenium(III)chloride redox probe systems.This modified electrode shows excellent electro-catalytic activity for dopamine(DA)and uric acid(UA)under physiological p H conditions,but inhibits the oxidation of ascorbic acid(AA).Linear voltammetric responses were obtained when DA concentrations of approximately 4.0-100μM and UA concentrations of approximately 20-100μM were used.The detection limits(S/N=3)for DA and UA were 1.0 and 5.0μM,respectively,under physiological conditions and in the presence of 1.0 m M of AA.This developed method was applied to the simultaneous detection of DA and UA in human urine,where satisfactory recoveries from 96.7%to 105.0%were observed.This work demonstrates that the developed OPEDOT-Au NPs-ERGO ternary nanocomposite,with its excellent ion-selectivity and electro-catalytic activity,is a promising candidate for the simultaneous detection of DA and UA in the presence of AA in physiological and pathological studies.展开更多
Synthesis and characteristics of poly(3,4-azopyridylene)(PAP),conductivity and oxygen-binding affinity of its complex with meso-α,α,α,α-tetrakis(o-pivalamidophenyl)porphyrinatocobalt(II)(COP)were studied.PAP was p...Synthesis and characteristics of poly(3,4-azopyridylene)(PAP),conductivity and oxygen-binding affinity of its complex with meso-α,α,α,α-tetrakis(o-pivalamidophenyl)porphyrinatocobalt(II)(COP)were studied.PAP was prepared by oxidative polymerization of 3,4-diaminopyridine(DAP)in DMF solution using CuCl/pyridine as the catalyst.IR and NMR results showed that the peak of amido group in DAP was converted to the azo group in PAP and a π conjugated polymer was synthesized.The average molecular weight of PAP was determined to be 5.0×10~3.The PAP-CoP complex was prepared by complexing the pyridyl group of PAP with the fifth coordination site of CoP in DMF solution.In comparison with the CoP complex with a non-π conjugated polymer,the PAP-CoP complex shows good electroconductivity of 5.8×10^(-6) S cm^(-1).The PAP-CoP complex displays a reversible change in the UV-Visible absorption spectrum from the deoxy form to the oxy or oxygen-binding one with an isosbestic point,in response to the partial oxygen pressure of the atmosphere.The oxygen- response behavior was monitored at the absorbance ascribed to the oxy form at 548 nm to give the oxygen-binding affinity. The oxygen-binding equilibrium curves of PAP-CoP complex obey a Langmuir isotherm.DMF has great effects on the oxygen-binding properties of the PAP-CoP complex.The oxygen-binding affinity of PAP-CoP complex in the solid state is higher than that in DMF solution.With decreasing temperature,the oxygen-binding affinity of the PAP-CoP complex increases.展开更多
Conventional chloromethylation, paraformaldehyde/hydrogen chloride in acetic acid medium, was applied to 1,2- dimethoxybenzene. Chloroform-soluble poly（3,4-dimethoxy-o-tolylene） was obtained with an intrinsic viscos...Conventional chloromethylation, paraformaldehyde/hydrogen chloride in acetic acid medium, was applied to 1,2- dimethoxybenzene. Chloroform-soluble poly（3,4-dimethoxy-o-tolylene） was obtained with an intrinsic viscosity of 0.034 dL g^-1. The polymer was evaluated as a condensation redox polymer precursor formed by a Friedel-Crafts reaction. Cleavage of the methoxy groups present in this polymer resulted in poly（3,4-dihydroxy-o-tolylene） which manifested a great air-oxidation resistance. The redox property of the latter polymer was found to be 1017 mV by potentiometric titration with 0.05 N ceric ammonium nitrate at 25℃. This midpotential was compared to that of catechol, a monomeric analogue, under the same titration conditions.展开更多
[Objective] This paper was to introduce the chemical oxidative synthesis process, properties and test methods of 3,4-ethylenedioxythiophene(EDOT). [Method] The poor water solubility of EDOT was solved by using polyeth...[Objective] This paper was to introduce the chemical oxidative synthesis process, properties and test methods of 3,4-ethylenedioxythiophene(EDOT). [Method] The poor water solubility of EDOT was solved by using polyethylene glycol 20000(PEG) as the surfactant. The monomer was polymerized by chemical oxidative synthesis. The product was analyzed and verified by infrared spectrum, X-ray diffraction, ultraviolet-visible absorption spectra.[Result] The conductivity of the product was the best when the mass ratio of PEG and EDOT was 1∶1. The effects of oxidant dose and reaction time on the conductivity and yield of the product showed certain regularity. [Conclusion] EDOT could be polymerized by PEG and FeCl3, and the polymerization product was PEDOT.展开更多
Conductive poly（3,4-ethylenedioxythiophene） coated terylene textile represented by PEDOT/CTT was prepared via in-situ polymerization.It is found that the PEDOT nano-particles with diameter of 100 nm spread over the ...Conductive poly（3,4-ethylenedioxythiophene） coated terylene textile represented by PEDOT/CTT was prepared via in-situ polymerization.It is found that the PEDOT nano-particles with diameter of 100 nm spread over the surface of terylene fibers resulting in a good conductivity of 2.67×10-2 S/cm,as measured by a four-probe method.Moreover,the PEDOT/CTT exhibits an electrochromic behavior,which takes a variation of color from pale blue to dark blue when the applied potential changed from-0.420 V to 01.0 V vs.SCE.展开更多
文摘A novel poly (amide-imide) was prepared from a novel monomer: 5,6-diphenyl-chloroformyl-3,4-benzenedicarboxylic anhydride and bis (4-aminophenyl) ether. The polymer was characterized by FTIR. (HNMR)-H-1. DSC and TGA.
基金Funded by National Natural Science Foundation of China(Nos.11179015,51173108)Innovation Program of Shanghai Municipal Education Commission(No.12ZZ143)
文摘Poly （3, 4-ethylenedioxythiophene） （PEDOT）, together with its dopes, such as poly （styrene sulfonate） （PSS）, has been acknowledged to have a wide range of biomedical applications as an important conducting polymer. In this study, gelatin can be polymerized into PEDOT/PSS polymers on indium tin oxide （ITO）-coated glass. PEDOT/PSS/gelatin layer on ITO-coated glass significantly decreases electrochemical impedance spectroscopy （EIS） and increases charge delivery capacity relative to the gelatin layer and bare ITO- coated glass, comparable to the PEDOT/PSS layer on ITO-coated glass. PEDOT/PSS/gelatin layer on ITO- coated glass enhances pheochromocytoma （PC 12） cell affinity, possesses a high biocompatibility and promotes PC 12 cell growth by delivery of electrical stimulation. These results suggest that gelatin can be incorporated into the PEDOT/PSS polymers through electrochemical polymerization and the PEDOT/PSS/gelatin layer on ITO-coated glass possesses high electrochemical and biological activities.
基金Financial supports from the Natural Science Foundation of Shaanxi Province,China(Grant No.:2020JM-652)Fundamental Research Funds for the Central Universities of Xi’an Jiaotong University(Grant No.:xzy012020054)Cultivation Project of Xi’an Health Committee(Grant No.:2020MS02)。
文摘An innovative,ternary nanocomposite composed of overoxidized poly(3,4-ethylenedioxythiophene)(OPEDOT),gold nanoparticles(Au NPs),and electrochemically reduced graphene oxide(ERGO)was prepared on a glassy carbon electrode(GCE)(OPEDOT-Au NPs-ERGO/GCE)through homogeneous chemical reactions and heterogeneous electrochemical methods.The morphology,composition,and structure of this nanocomposite were characterized by transmission electron microscopy,scanning electron microscopy,X-ray diffraction,and X-ray photoelectron spectroscopy.The electrochemical properties of the OPEDOT-Au NPs-ERGO/GCE were investigated by cyclic voltammetry using potassium ferricyanide and hexaammineruthenium(III)chloride redox probe systems.This modified electrode shows excellent electro-catalytic activity for dopamine(DA)and uric acid(UA)under physiological p H conditions,but inhibits the oxidation of ascorbic acid(AA).Linear voltammetric responses were obtained when DA concentrations of approximately 4.0-100μM and UA concentrations of approximately 20-100μM were used.The detection limits(S/N=3)for DA and UA were 1.0 and 5.0μM,respectively,under physiological conditions and in the presence of 1.0 m M of AA.This developed method was applied to the simultaneous detection of DA and UA in human urine,where satisfactory recoveries from 96.7%to 105.0%were observed.This work demonstrates that the developed OPEDOT-Au NPs-ERGO ternary nanocomposite,with its excellent ion-selectivity and electro-catalytic activity,is a promising candidate for the simultaneous detection of DA and UA in the presence of AA in physiological and pathological studies.
基金This work was supported by the National Natural Science Foundation of China(No.50373035)Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry
文摘Synthesis and characteristics of poly(3,4-azopyridylene)(PAP),conductivity and oxygen-binding affinity of its complex with meso-α,α,α,α-tetrakis(o-pivalamidophenyl)porphyrinatocobalt(II)(COP)were studied.PAP was prepared by oxidative polymerization of 3,4-diaminopyridine(DAP)in DMF solution using CuCl/pyridine as the catalyst.IR and NMR results showed that the peak of amido group in DAP was converted to the azo group in PAP and a π conjugated polymer was synthesized.The average molecular weight of PAP was determined to be 5.0×10~3.The PAP-CoP complex was prepared by complexing the pyridyl group of PAP with the fifth coordination site of CoP in DMF solution.In comparison with the CoP complex with a non-π conjugated polymer,the PAP-CoP complex shows good electroconductivity of 5.8×10^(-6) S cm^(-1).The PAP-CoP complex displays a reversible change in the UV-Visible absorption spectrum from the deoxy form to the oxy or oxygen-binding one with an isosbestic point,in response to the partial oxygen pressure of the atmosphere.The oxygen- response behavior was monitored at the absorbance ascribed to the oxy form at 548 nm to give the oxygen-binding affinity. The oxygen-binding equilibrium curves of PAP-CoP complex obey a Langmuir isotherm.DMF has great effects on the oxygen-binding properties of the PAP-CoP complex.The oxygen-binding affinity of PAP-CoP complex in the solid state is higher than that in DMF solution.With decreasing temperature,the oxygen-binding affinity of the PAP-CoP complex increases.
文摘Conventional chloromethylation, paraformaldehyde/hydrogen chloride in acetic acid medium, was applied to 1,2- dimethoxybenzene. Chloroform-soluble poly（3,4-dimethoxy-o-tolylene） was obtained with an intrinsic viscosity of 0.034 dL g^-1. The polymer was evaluated as a condensation redox polymer precursor formed by a Friedel-Crafts reaction. Cleavage of the methoxy groups present in this polymer resulted in poly（3,4-dihydroxy-o-tolylene） which manifested a great air-oxidation resistance. The redox property of the latter polymer was found to be 1017 mV by potentiometric titration with 0.05 N ceric ammonium nitrate at 25℃. This midpotential was compared to that of catechol, a monomeric analogue, under the same titration conditions.
基金Natural Science Foundation of Guangxi Province(2017GXNSFAA198274)
文摘[Objective] This paper was to introduce the chemical oxidative synthesis process, properties and test methods of 3,4-ethylenedioxythiophene(EDOT). [Method] The poor water solubility of EDOT was solved by using polyethylene glycol 20000(PEG) as the surfactant. The monomer was polymerized by chemical oxidative synthesis. The product was analyzed and verified by infrared spectrum, X-ray diffraction, ultraviolet-visible absorption spectra.[Result] The conductivity of the product was the best when the mass ratio of PEG and EDOT was 1∶1. The effects of oxidant dose and reaction time on the conductivity and yield of the product showed certain regularity. [Conclusion] EDOT could be polymerized by PEG and FeCl3, and the polymerization product was PEDOT.
文摘Conductive poly（3,4-ethylenedioxythiophene） coated terylene textile represented by PEDOT/CTT was prepared via in-situ polymerization.It is found that the PEDOT nano-particles with diameter of 100 nm spread over the surface of terylene fibers resulting in a good conductivity of 2.67×10-2 S/cm,as measured by a four-probe method.Moreover,the PEDOT/CTT exhibits an electrochromic behavior,which takes a variation of color from pale blue to dark blue when the applied potential changed from-0.420 V to 01.0 V vs.SCE.
