Density,viscosity and ultrasonic v elocity of solutions of four Schiff bases in 1,4-dioxane and dimethylfor -mamide(DMF )were measured at 308.15K.Various acoustical properties such as specific impedance(Z),adiabatic c...Density,viscosity and ultrasonic v elocity of solutions of four Schiff bases in 1,4-dioxane and dimethylfor -mamide(DMF )were measured at 308.15K.Various acoustical properties such as specific impedance(Z),adiabatic compressibility(κ s ),Rao’s molar sound function(R m ),the van der Waals constant (b),molar compressibility(W),intermolecular free length(L f ),relaxation strength(r),solvation number(S n ),were calculated.The results are in terpret-ed in terms of molecular interactions occurring in the solutions.展开更多
Electrodeposition of Sm-Co alloy in DMF solution was studied by cyclic voltammetry and potentiostatic deposition at room temperature. The results show that small amount of water in a solution of Sm(NO 3) 3+CoCl 2+DMF ...Electrodeposition of Sm-Co alloy in DMF solution was studied by cyclic voltammetry and potentiostatic deposition at room temperature. The results show that small amount of water in a solution of Sm(NO 3) 3+CoCl 2+DMF blocked the electrodeposition of Sm-Co due to the formation of nonconductive Sm(OH) 3 film on the cathode surface. Citric acid could buffer the pH change and inhibit the precipitation of Sm(OH) 3 on the cathode surface which makes the co-deposition of Sm and Co easy. Potentiostatic deposition was carried out on copper electrode in Sm(NO 3) 3+CoCl 2+Citric acid+DMF solution and Sm-Co alloy films were obtained where the content of Sm could be as high as 57 56%.展开更多
文摘Density,viscosity and ultrasonic v elocity of solutions of four Schiff bases in 1,4-dioxane and dimethylfor -mamide(DMF )were measured at 308.15K.Various acoustical properties such as specific impedance(Z),adiabatic compressibility(κ s ),Rao’s molar sound function(R m ),the van der Waals constant (b),molar compressibility(W),intermolecular free length(L f ),relaxation strength(r),solvation number(S n ),were calculated.The results are in terpret-ed in terms of molecular interactions occurring in the solutions.
基金supported by the National Natural Science Foundation of China(20573098)Science and Technology Foundation of the National Defense Key Laboratory of Propellant and Explosive Combustion in China(9140C3501020901)~~
文摘Electrodeposition of Sm-Co alloy in DMF solution was studied by cyclic voltammetry and potentiostatic deposition at room temperature. The results show that small amount of water in a solution of Sm(NO 3) 3+CoCl 2+DMF blocked the electrodeposition of Sm-Co due to the formation of nonconductive Sm(OH) 3 film on the cathode surface. Citric acid could buffer the pH change and inhibit the precipitation of Sm(OH) 3 on the cathode surface which makes the co-deposition of Sm and Co easy. Potentiostatic deposition was carried out on copper electrode in Sm(NO 3) 3+CoCl 2+Citric acid+DMF solution and Sm-Co alloy films were obtained where the content of Sm could be as high as 57 56%.
