A simple and speedy method of synthesis manganese phthalocyanine(MnPc) via direct heating employing phthalic nitrile and manganese chloride was presented.After the sulfonation of MnPc,strong fluorescence was obtained ...A simple and speedy method of synthesis manganese phthalocyanine(MnPc) via direct heating employing phthalic nitrile and manganese chloride was presented.After the sulfonation of MnPc,strong fluorescence was obtained in the manganese sulfonate phthalocyanine(MnSPc) solution.In the acidic medium,the fluorescence intensity of MnSPc solution was equenched due to addition of NO2-ion.It was found that the fluorescence intensity(ΔF) was linear well with-log in the range of 5×10-9mol/L^1×10-6 mol/L with r=-0.993 and the limit of detection for NO2-ion was 1.74×10-9 mol/L.The recovery ratio was 106% for the sample.This detection method is advantageous for its sensitivity,selectivity,simple operation,and short response time and can be used to determine trace amounts of NO2-.展开更多
The electrochemical synthesis of urea by simultaneous reduction of nitrite and CO2 was performed in 0.02 mol·L-1 NaNO2 and 0.2 mol·L-1 NaHCO3 aqueous solutions at 925 Ag electrode in laboratory-scale experim...The electrochemical synthesis of urea by simultaneous reduction of nitrite and CO2 was performed in 0.02 mol·L-1 NaNO2 and 0.2 mol·L-1 NaHCO3 aqueous solutions at 925 Ag electrode in laboratory-scale experiments.The effect of several parameters, including electrolysis potential, temperature, and CO2 pressure, on urea formation was investigated.At the temperature of 293 K,CO2 pressure of 0.7 MPa, the electrolytic potential of -0.6 V, the current efficiency of urea formation reached 37%.Under the conditions of temperature of 273 K and electrolytic potential of -1.7 V, the current efficiency reached 26% under normal ambient pressure.Based on the relationship of current efficiency and formation of CO, NH3 and urea, a tentative reaction pathway was proposed.展开更多
文摘A simple and speedy method of synthesis manganese phthalocyanine(MnPc) via direct heating employing phthalic nitrile and manganese chloride was presented.After the sulfonation of MnPc,strong fluorescence was obtained in the manganese sulfonate phthalocyanine(MnSPc) solution.In the acidic medium,the fluorescence intensity of MnSPc solution was equenched due to addition of NO2-ion.It was found that the fluorescence intensity(ΔF) was linear well with-log in the range of 5×10-9mol/L^1×10-6 mol/L with r=-0.993 and the limit of detection for NO2-ion was 1.74×10-9 mol/L.The recovery ratio was 106% for the sample.This detection method is advantageous for its sensitivity,selectivity,simple operation,and short response time and can be used to determine trace amounts of NO2-.
文摘The electrochemical synthesis of urea by simultaneous reduction of nitrite and CO2 was performed in 0.02 mol·L-1 NaNO2 and 0.2 mol·L-1 NaHCO3 aqueous solutions at 925 Ag electrode in laboratory-scale experiments.The effect of several parameters, including electrolysis potential, temperature, and CO2 pressure, on urea formation was investigated.At the temperature of 293 K,CO2 pressure of 0.7 MPa, the electrolytic potential of -0.6 V, the current efficiency of urea formation reached 37%.Under the conditions of temperature of 273 K and electrolytic potential of -1.7 V, the current efficiency reached 26% under normal ambient pressure.Based on the relationship of current efficiency and formation of CO, NH3 and urea, a tentative reaction pathway was proposed.
