Additive reactions of Ni[(C 4H 9O) 2PS 2] 2 with ethylamine,diethylamine and triethylamine were studied by spectrophotometric methods in ethanol at several tempertures.With ethylamine,the adduct formation of NiL 2...Additive reactions of Ni[(C 4H 9O) 2PS 2] 2 with ethylamine,diethylamine and triethylamine were studied by spectrophotometric methods in ethanol at several tempertures.With ethylamine,the adduct formation of NiL 2·B and NiL 2·B 2 was established.For diethylamine and triethylamine,being of their steric hindrance effect,the formation of NiL 2·B only was concluded.Their additive equilibrium constants(lg β n)and additive molecular number(n) were discussed.Thermodynamic parameters △ r H m and △ r S m were found by the least square method.The additive equilibrium constants in the range 278 0～303 0K were described by empirical equation.展开更多
A novel Co(II) coordination polymer bridged by 1,2,4,5-benzene-tetracarboxylate is solvothermally syn- thesized, which possesses one-dimensional chain structure. The complex crystallizes in the triclinic crystal syste...A novel Co(II) coordination polymer bridged by 1,2,4,5-benzene-tetracarboxylate is solvothermally syn- thesized, which possesses one-dimensional chain structure. The complex crystallizes in the triclinic crystal system, P1 space group, a = 0.9610(1) nm, b = 0.9684(1) nm, c = 0.7924(1) nm, α = 96.695(9)°, β = 102.741(6)°, γ = 116.551(5)°, V = 0.6236(2) nm3, Z = 2, R1 = 0.0342, wR2 = 0.0990. The surface photovoltage spectra measurement shows that the title com- plex exhibits obvious photovoltage response in the 300—800 nm regions. The variable temperature susceptibility reveals that the complex possesses weak antiferromagnetic property.展开更多
用热重-差热(TG-DTA)技术,在不同升温速率条件下,研究了十水草酸镧在空气气氛下的热分解过程.分别采用Ozawa-Flynm-Wall法、Kissinger法、Crane法和同步热分析法确定其热分解动力学参数.TG-DTA曲线表明:十水草酸镧分解为四个阶段,前两...用热重-差热(TG-DTA)技术,在不同升温速率条件下,研究了十水草酸镧在空气气氛下的热分解过程.分别采用Ozawa-Flynm-Wall法、Kissinger法、Crane法和同步热分析法确定其热分解动力学参数.TG-DTA曲线表明:十水草酸镧分解为四个阶段,前两个阶段为脱水过程,后两个阶段为La_2(C_2O_4)_3的分解过程.实验计算得出四步反应表观活化能E分别为83.92、76.04、136.26、162.61 k J·mol-1左右;指前因子A分别为4.92×10^(10)、6.1×10~7、2.1×10~9、8.46×10~6s-1左右;反应级数n均为1左右,并用Coats-Redfem积分法得出第三步分解机理受F1控制.展开更多
文摘Additive reactions of Ni[(C 4H 9O) 2PS 2] 2 with ethylamine,diethylamine and triethylamine were studied by spectrophotometric methods in ethanol at several tempertures.With ethylamine,the adduct formation of NiL 2·B and NiL 2·B 2 was established.For diethylamine and triethylamine,being of their steric hindrance effect,the formation of NiL 2·B only was concluded.Their additive equilibrium constants(lg β n)and additive molecular number(n) were discussed.Thermodynamic parameters △ r H m and △ r S m were found by the least square method.The additive equilibrium constants in the range 278 0～303 0K were described by empirical equation.
文摘A novel Co(II) coordination polymer bridged by 1,2,4,5-benzene-tetracarboxylate is solvothermally syn- thesized, which possesses one-dimensional chain structure. The complex crystallizes in the triclinic crystal system, P1 space group, a = 0.9610(1) nm, b = 0.9684(1) nm, c = 0.7924(1) nm, α = 96.695(9)°, β = 102.741(6)°, γ = 116.551(5)°, V = 0.6236(2) nm3, Z = 2, R1 = 0.0342, wR2 = 0.0990. The surface photovoltage spectra measurement shows that the title com- plex exhibits obvious photovoltage response in the 300—800 nm regions. The variable temperature susceptibility reveals that the complex possesses weak antiferromagnetic property.
文摘用热重-差热(TG-DTA)技术,在不同升温速率条件下,研究了十水草酸镧在空气气氛下的热分解过程.分别采用Ozawa-Flynm-Wall法、Kissinger法、Crane法和同步热分析法确定其热分解动力学参数.TG-DTA曲线表明:十水草酸镧分解为四个阶段,前两个阶段为脱水过程,后两个阶段为La_2(C_2O_4)_3的分解过程.实验计算得出四步反应表观活化能E分别为83.92、76.04、136.26、162.61 k J·mol-1左右;指前因子A分别为4.92×10^(10)、6.1×10~7、2.1×10~9、8.46×10~6s-1左右;反应级数n均为1左右,并用Coats-Redfem积分法得出第三步分解机理受F1控制.
