酸性水溶液中硫氰酸钼(V)配合物的研究  

Study of Molybdenum ( V ) Thiocyanate Complexes in the Acidic Aqueous Solution

作　　者：杨冬[1] 包永明[1] 安利佳[1] 

机构地区：[1]大连理工大学生化工程研究所,辽宁大连116012

出　　处：《光谱学与光谱分析》2003年第2期337-339,共3页Spectroscopy and Spectral Analysis

摘　　要：研究了酸性水溶液中硫氰酸钼配合物(V)的吸收光谱，发现在460nm处有最大吸收，最大平均摩尔吸光系数为1．02×10^4。用平衡移动法确定其生成机理为一种三级分级配合反应，并用Ялимирский法确定了各级配合物的稳定常数分别为β1＝15．63，β2=174．4和β3＝1502，相应的摩尔吸光系数是Δεl＝8957，Δε2＝9347和Δε3＝10610。In this paper, the Mo( V )-thiocyanate complexing reaction in the acidic aqueous solution without surfactant or organic solvent was studied. It was found that the Mo( V )-thiocyanate complexes could be stable for 4 h at least in the 50 mL solution containing 7.5mLH2SO4 (1:1), 4 mL HC1O4, (1:1), 3 mg Fe2+ and 4 mL vitamin C (6%). The absorption spectrum of Mo( V )-thiocya-nate complexes under this condition was studied, a peak of 460 nm was found and the maximal mokr absorption coefficient was determined to be 1.02 × 104. The reaction mechanism of the Mo( V )-thiocyanate complexes was determined to be a three-grade complexing reaction by using the equilibrium movement method. Meanwhile, the stable constants of all kinds of grades complexes was determined by the method to be β1 = 15.63, β2 = 174.4 and β3 = 1 502 , and the corresponding molar absorption coefficients were △ω1, = 8 957, △ω2 = 9 347 and △ω3 = 10 610 , respectively.

关 键 词：酸性水溶液 硫氰酸钼(V)配合物 分级配位 平衡移动法 摩尔吸光系数 稳定常数 

分 类 号：O614.612[理学—无机化学]