首页> 外文期刊>Chemistry: A European journal >Isolated supramolecular [Ru(bpy)_3]-viologen-[Ru(bpy)_3] complexes with trapped CB[7,8] and photoinduced electron-transfer study in nonaqueous solution
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Isolated supramolecular [Ru(bpy)_3]-viologen-[Ru(bpy)_3] complexes with trapped CB[7,8] and photoinduced electron-transfer study in nonaqueous solution

机译:分离的超分子[Ru(bpy)_3]-紫精-[Ru(bpy)_3]配合物与捕获的CB [7,8]配合物在非水溶液中的光诱导电子转移研究

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摘要

The synthesis of two supramolecular diruthenium complexes, 1?CB[7] and 1?CB[8] (CB[n]=cucurbit[n]uril), which contain the respective host CB[7] and CB[8], were synthesized and isolated. In the case of host CB[8], the desired supramolecular complex was obtained by utilizing dihydroxynapthalene as a template during the synthesis. The ~1H NMR spectra, electrochemistry, and photochemistry of these supramolecular complexes were performed in nonaqueous solution. The results show that both CB[7,8] hosts mainly bind to the linker part in solution in acetonitrile. This binding also lowers the oxidation potential of the ruthenium metal center and hinders the quenching effect by the viologen moiety. It has also been shown that external methylviologen can be included into 1?CB[8]. Analysis with NMR spectroscopy, electrochemistry, and photochemistry clearly shows a viologen radical dimer formation between the bound viologen and free methylviologen, thereby showing that the unique abilities of the CB[8] host can be utilized even in nonaqueous solution.
机译:合成了两个超分子二钌配合物1?CB [7]和1?CB [8](CB [n] = cucurbit [n] uril),它们分别包含主体CB [7]和CB [8]。合成和分离。对于宿主CB [8],通过在合成过程中以二羟基萘为模板获得所需的超分子复合物。这些超分子配合物的〜1H NMR光谱,电化学和光化学在非水溶液中进行。结果表明,两种CB [7,8]主体均主要与乙腈溶液中的接头部分结合。这种结合还降低了钌金属中心的氧化电势并阻碍了紫精部分的猝灭作用。还表明,外部甲基紫精可以包含在1?CB中[8]。 NMR光谱,电化学和光化学分析清楚地表明,在结合的紫精和游离甲基紫精之间形成了紫精自由基二聚体,从而表明CB [8]主体的独特能力甚至可以在非水溶液中使用。

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