Electrocatalytic oxidation of thiosulfate at the 2,7-BFEFMCPE occurs at a potential about 460 mV less positive than that unmodified carbon paste electrode.The diffusion coefficient（=5.6×10^-5）cm^2 s^-1）,the ki...Electrocatalytic oxidation of thiosulfate at the 2,7-BFEFMCPE occurs at a potential about 460 mV less positive than that unmodified carbon paste electrode.The diffusion coefficient（=5.6×10^-5）cm^2 s^-1）,the kinetic parameters such as electron transfer coefficient,（=0.5） and kh（=1.21×10^-3 cm s^-1） of thiosulfate oxidation at the surface of,2,7-BFEFMCPE were determined.The electrocatalytic oxidation peak current of thiosulfate showed two linear dynamic ranges（0.0006-0.009 mmol/L and 0.009- 0.900 mmol/L） and a detection limit of 0.00015 mmol/L.This method was also examined as a new electrochemical sensor for the determination of thiosulfate in real sample.展开更多
Deposition of Yb-Bi thin films was carried out from a nonaqueous solution by using cyclic electrodepositon. During electrodeposition the substrate potential was continuously cycled between two potentials. The effects ...Deposition of Yb-Bi thin films was carried out from a nonaqueous solution by using cyclic electrodepositon. During electrodeposition the substrate potential was continuously cycled between two potentials. The effects of several factors including the potential of deposition, time of deposition and sweep rate on the Yb content in the thin films and surface morphology were studied. Experimental results indicate that the amorphous Yb-Bi thin films containing Yb 21.04%～36.36% (mass fraction) can be prepared in 0.10 mol·L^(-1) YbCl_3+0.10 mol·L^(-1) Bi(NO_3)_3+0.10 mol·L^(-1) LiCl+DMSO by controlling deposition conditions of the system. They are black, uniform, metallic luster and adhered firmly to the copper substrates. The films were characterized by X-ray energy dispersive analysis (EDS), scanning electron microcoscope (SEM) and X-ray diffraction (XRD).展开更多
Cyclic electrodeposition was used to investigate the preparation of Er-Co-Bi alloy thin film in DMSO system. Experimental results indicate that Er-Co-Bi alloy thin film containing 14.83 %32.65 % Er is prepared from 0....Cyclic electrodeposition was used to investigate the preparation of Er-Co-Bi alloy thin film in DMSO system. Experimental results indicate that Er-Co-Bi alloy thin film containing 14.83 %32.65 % Er is prepared from 0.1 mol/L ErCl3+0.1 mol/L CoCl2+0.1 mol/L Bi（NO3）3+0.1 mol/L LiCl +DMSO system by cyclic electrodeposition on Cu substrate. The optimum cyclic potential of electrodeposition is that upper potential is within a potential range from -0.50 V to -1.00 V and lower potential is within a potential range from -2.00 V to )-2.60 V.) The surface of alloy thin film observed by scanning electron microscope is black, adhesive and has metallic luster. The film is amorphous proved by the X-ray diffractometry.展开更多
The present paper covers the syntheses of 1,8adipoylamidobis(1,10phenanthroline5yl)(bphaa) and its binuclear complex {[(bpy) 2Ru] 2(bphaa)}(PF 6) 4, where bpy is 2,2′bipyridine. The two novel compounds were confi...The present paper covers the syntheses of 1,8adipoylamidobis(1,10phenanthroline5yl)(bphaa) and its binuclear complex {[(bpy) 2Ru] 2(bphaa)}(PF 6) 4, where bpy is 2,2′bipyridine. The two novel compounds were confirmed by means of elemental analysis, IR, LDMS and 1H NMR , and 1H NMR spectra were completely assigned in virtue of 1H 1H COSY. The electrochemical behavior of the binuclear Ru(Ⅱ) complex was obtained using cyclic and squarewave voltammetry. Its photophysical property was investigated by electronic absorption, fluorescence excitation and emission spectra.展开更多
文摘Electrocatalytic oxidation of thiosulfate at the 2,7-BFEFMCPE occurs at a potential about 460 mV less positive than that unmodified carbon paste electrode.The diffusion coefficient（=5.6×10^-5）cm^2 s^-1）,the kinetic parameters such as electron transfer coefficient,（=0.5） and kh（=1.21×10^-3 cm s^-1） of thiosulfate oxidation at the surface of,2,7-BFEFMCPE were determined.The electrocatalytic oxidation peak current of thiosulfate showed two linear dynamic ranges（0.0006-0.009 mmol/L and 0.009- 0.900 mmol/L） and a detection limit of 0.00015 mmol/L.This method was also examined as a new electrochemical sensor for the determination of thiosulfate in real sample.
文摘Deposition of Yb-Bi thin films was carried out from a nonaqueous solution by using cyclic electrodepositon. During electrodeposition the substrate potential was continuously cycled between two potentials. The effects of several factors including the potential of deposition, time of deposition and sweep rate on the Yb content in the thin films and surface morphology were studied. Experimental results indicate that the amorphous Yb-Bi thin films containing Yb 21.04%～36.36% (mass fraction) can be prepared in 0.10 mol·L^(-1) YbCl_3+0.10 mol·L^(-1) Bi(NO_3)_3+0.10 mol·L^(-1) LiCl+DMSO by controlling deposition conditions of the system. They are black, uniform, metallic luster and adhered firmly to the copper substrates. The films were characterized by X-ray energy dispersive analysis (EDS), scanning electron microcoscope (SEM) and X-ray diffraction (XRD).
文摘Cyclic electrodeposition was used to investigate the preparation of Er-Co-Bi alloy thin film in DMSO system. Experimental results indicate that Er-Co-Bi alloy thin film containing 14.83 %32.65 % Er is prepared from 0.1 mol/L ErCl3+0.1 mol/L CoCl2+0.1 mol/L Bi（NO3）3+0.1 mol/L LiCl +DMSO system by cyclic electrodeposition on Cu substrate. The optimum cyclic potential of electrodeposition is that upper potential is within a potential range from -0.50 V to -1.00 V and lower potential is within a potential range from -2.00 V to )-2.60 V.) The surface of alloy thin film observed by scanning electron microscope is black, adhesive and has metallic luster. The film is amorphous proved by the X-ray diffractometry.
基金Supported by the Ministry of Science and Technology of China
文摘The present paper covers the syntheses of 1,8adipoylamidobis(1,10phenanthroline5yl)(bphaa) and its binuclear complex {[(bpy) 2Ru] 2(bphaa)}(PF 6) 4, where bpy is 2,2′bipyridine. The two novel compounds were confirmed by means of elemental analysis, IR, LDMS and 1H NMR , and 1H NMR spectra were completely assigned in virtue of 1H 1H COSY. The electrochemical behavior of the binuclear Ru(Ⅱ) complex was obtained using cyclic and squarewave voltammetry. Its photophysical property was investigated by electronic absorption, fluorescence excitation and emission spectra.
