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为了用醋酸铜取代昂贵难求的醋酸铑作原料,合成在太阳能利用方面很有前途的过渡金属双核络合物光敏荆,用热重(TG)法求得了水合醋酸铜热解过程2个步骤的有关动力学参数:第一步骤对应温度为66～140℃;反应级数n=1;表观活化能E=91.7kJ·mol~(-1);指前因子A=6.65×10~(11)min~(-1).第二步骤对应温度为223～295℃;n=1;E=163kJ.mol~(-1);A=7.95×10~(14)min~(-1).确定了2个步骤的速率常数k对温度T的函数关系式.计算了第二步骤的标准活化熵△_r~≠S_m~(?)=34.2J·mol~(-1)·K~(-1),标准活化焓△_r~≠H_m~(?)=162kJ·mol~(-1).评价了醋酸铜的热稳定性,并确定了用其作原料合成双核铜络合物时的适宜反应温度.
In order to replace the expensive acetic acid copper acetate rhodium as a raw material, synthesis of solar energy promising promising transition metal binuclear complex photosensitive Jing, obtained by thermal gravimetric (TG) method of hydration of copper acetate pyrolysis process two steps The kinetic parameters are as follows: the first step corresponds to the temperature of 66-140 ℃; the reaction order n = 1; the apparent activation energy E = 91.7kJ · mol -1; pre-exponential factor A = 6.65 × 10 ~ 11) min ~ (-1) .The second step corresponds to the temperature of 223 ~ 295 ℃; n = 1; E = 163kJ.mol ~ (-1); A = 7.95 × 10 ~ (14) min ~ The function relationship between the rate constant k and the temperature T in two steps was determined. The standard activation entropy △ _r ~ ≠ S_m ~ (?) = 34.2J · mol ~ (-1) · K ~ -1), the standard enthalpy of activation △ _r ~ ≠ H_m ~ (?) = 162kJ · mol ~ (-1) .The thermal stability of copper acetate was evaluated and the results of the synthesis of dinuclear copper complex Suitable reaction temperature.