Electrosynthesis in a microemulsion using a novel cobaloxime catalyst

[Bis[μ-[(2,3-butanedione dioximato)(2-)-O:O′]]tetrafluorodiborato(2-)-N,N′,N″,N]cobalt (COBF, 1) was used as a catalyst for the conversion of trans-1,2-dibromocyclohexane (DBCH) to cyclohexene and the photoelectrochemical cyclisation of 2-(4-bromobutyl)-2-cyclohexen-1-one (BBC) to trans-1-decalone 2 in a microemulsion. Voltammetry showed clear evidence of catalytic behaviour and bulk electrolysis showed larger turnover numbers for both reactions when compared with the same system using vitamin B_12a as catalyst. For BBC, improved turnover may result from a relatively weak carbon–cobalt bond in the alkylcobalt intermediate of 1, and from better partition of 1 into the organic phase in which reactant BBC resides.     

纳米电极材料的制备及其电化学性质研究(Ⅲ)——微乳液中通氧气制备MnO_2及其性能

本文采用锰盐微乳液中通氧气法成功制备了超细粉末ＭｎＯ２,对所得样品进行了化学分析,ＸＲＤ,ＴＥＭ测试,证明为γ ＭｎＯ２,平均粒径在纳米级范围内．再经恒电流放电,循环伏安,分形维数,交流阻抗等测试,发现在适当制备条件下所得纳米ＭｎＯ２具有良好的放电性能,并对此作了初步的理论探讨