锇(Ⅷ)-N-(8-喹啉基)-N’-苯甲酰基硫脲(QBTU)络合物吸附波的1.5次微分极谱研究  

Study on The 1.5th Order Differential Polarographic Adsorptive Wave of Osmium(Ⅷ)-N-(8-Quinolyl)-N'-Benoylthio-Urea(QBTU) Complex

作　　者：郑清四 王宅中[1] 卢文 黄昆丽 

机构地区：[1]云南大学化学系 [2]云南民族学院化学系,昆明650031

出　　处：《冶金分析》1992年第5期12-14,共3页Metallurgical Analysis

摘　　要：于0.025mol/LNaOH溶液中,Os(Ⅷ)-QBTU体系产生—明晰的极谱波,其1.5次微分峰电流与浓度在1.0×10^(-7)～4.0×10^(-5)mol/L范围内呈线性关系。研究了极谱电流的性质、反应机理及电极过程等后确认:络合物的组成为[OsO_4(OH)_2·QBTU]·Na_2并吸附于滴汞电极表面,配体QBTU在不离解出的情况下发生电还原,获得络合物吸附波,电极过程不可逆,[OsO_4(OH)_2·QBTU]^(2-)离子的条件稳定常数8.5×10~5。In the solution of 0.025 mol/L NaOH, Os (Ⅷ) - QBTU system produces a distinct polarographic wave, the change of the peak current of 1.5th order derivative wave with the concentration of Os(Ⅷ) is linear in the range from 1.0×10-7 to 4.0×10-5 mol/L. The polarographic current property, reaction mechanism and electrode process have been discussed, it shows that the complex [OsO4 (OH)2 QBTU] Na2 has been formed in the condition studied. This complex was adsorbed onto the surface of the DME.then the ligand of the complex was reduced and yielded the adsorptive complex wave. The electrode process is inreversible. The complex conditional stability constant is 8.15X105.

关 键 词：锇 络合物吸附波 极谱分析 

分 类 号：O614.824[理学—无机化学]