Two new coordination compounds of rare earth chloride with N-acetyl-DL-alanine and imidazole have been prepared from absolute alcohol. The general formula RE(C5H8NO3)2(C3H5N2)2Cl3·4H2O (RE=Ce, Pr) of these compou...Two new coordination compounds of rare earth chloride with N-acetyl-DL-alanine and imidazole have been prepared from absolute alcohol. The general formula RE(C5H8NO3)2(C3H5N2)2Cl3·4H2O (RE=Ce, Pr) of these compounds were identified, by chemical and elemental analysis, FTIR spectra, UV spectra, 1H NMR and 13C NMR spectra, and molar conductance. The processes of thermal decomposition were identified by TG-DSC curves. The possible reaction mechanisms and the kinetics equation were investigated by comparing the kinetics parameters. The activation entropy of dehydration, as well as enthalpy values of dehydration and decomposition were obtained by DSC curve. The three-dimensional fluorescence spectra of liquid compounds were measured. The phenomenon of the up-conversion fluorescence is discussed.展开更多
Zinc Nickel electrodepositing process and corrosion resistance of Zinc Nickel obtained in a chloride bath with or without rare earth compounds are investigated.The experimental results show that the process of Zinc Ni...Zinc Nickel electrodepositing process and corrosion resistance of Zinc Nickel obtained in a chloride bath with or without rare earth compounds are investigated.The experimental results show that the process of Zinc Nickel alloy belongs to "anomalous codeposition" and the nickel content (mass percent) of Zinc Nickel alloy coating is about 13%.When a small amount of rare earth compounds are added to the bath,the cathodic polarization of the electrodepositing process is increased,the alloy coatings gained from the bath become more close in structure and more fine in crystal and the corrosion resistance is also improved.展开更多
文摘Two new coordination compounds of rare earth chloride with N-acetyl-DL-alanine and imidazole have been prepared from absolute alcohol. The general formula RE(C5H8NO3)2(C3H5N2)2Cl3·4H2O (RE=Ce, Pr) of these compounds were identified, by chemical and elemental analysis, FTIR spectra, UV spectra, 1H NMR and 13C NMR spectra, and molar conductance. The processes of thermal decomposition were identified by TG-DSC curves. The possible reaction mechanisms and the kinetics equation were investigated by comparing the kinetics parameters. The activation entropy of dehydration, as well as enthalpy values of dehydration and decomposition were obtained by DSC curve. The three-dimensional fluorescence spectra of liquid compounds were measured. The phenomenon of the up-conversion fluorescence is discussed.
文摘Zinc Nickel electrodepositing process and corrosion resistance of Zinc Nickel obtained in a chloride bath with or without rare earth compounds are investigated.The experimental results show that the process of Zinc Nickel alloy belongs to "anomalous codeposition" and the nickel content (mass percent) of Zinc Nickel alloy coating is about 13%.When a small amount of rare earth compounds are added to the bath,the cathodic polarization of the electrodepositing process is increased,the alloy coatings gained from the bath become more close in structure and more fine in crystal and the corrosion resistance is also improved.
