VOLTAMMETRIC DEPOSITION AND STRIPPING OF SELENIUM(IV) AT A ROTATING GOLD-DISK ELECTRODE IN 0.1M PERCHLORIC-ACID
VOLTAMMETRIC DEPOSITION AND STRIPPING OF SELENIUM(IV) AT A ROTATING GOLD-DISK ELECTRODE IN 0.1M PERCHLORIC-ACID
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DOI：
10.1021/ac60352a005
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发表时间：
1975-01-01
影响因子：
7.4
通讯作者：
JOHNSON, DC
中科院分区：
文献类型：
--
作者：
ANDREWS, RW;JOHNSON, DC
硒（IV）在0.1 M高氯酸·OH自由基中在旋转金盘电极上的伏安沉积和溶出分别为3.3 × 106、3.0 × 109和2.1 × 106。因此，当苯或甲苯与乙腈混合时，扩散的OH·应被苯或甲苯完全消耗。因此，我们在苯/乙腈（40/60）（v/v）和甲苯/乙腈（40/60）（v/v）的混合溶剂中，探索了BU 4 NOH在耗尽电解中偶联产物联苯和联苄的形成。在+1.1V和+1.7V下进行的电解中，用薄层色谱法没有观察到偶联产物，在这些电解中，以及前面的那些（没有捕获底物）中，我们观察到在电解过程中反应混合物变暗（棕色）。虽然本研究中的阴性产物结果有些不令人满意，但对乙腈中阳极氢氧化物氧化的部分解释是可能的，如下所示。
Voltammetric deposition and stripping of selenium (IV) at a rotating gold-disk electrode in 0.1 M perchloric acid hydroxyl radical are 3.3 X 10®, 3.0 X 109, and 2.1 X 106, re-spectively. Thus a diffusing OH· should be consumed en-tirely by benzene or toluene when generated in mixtures of those hydrocarbons with acetonitrile. We have accordingly searched for the formation of the coupling products biphenyl and bibenzyl in exhaustive electrolysis of BU4NOH in mixed solvents of benzene/acetonitrile (40/60)(v/v) and toluene/acetonitrile (40/60)(v/v). In electrolyses conducted at+ 1.1 and+ 1.7 V, no coupling products were observed by thin layer chromatography.In these electrolyses, as well as those preceding (no trap-ping substrate), we observed a darkening (brown colora-tion) of the reaction mixture during the electrolysis. While the negative product findings in this investigation are somewhat unsatisfying, a partial interpretation of the anodic hydroxide oxidation in acetonitrile is possible, and follows.