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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Surfactant behaviour of metallacarboranes. A study based on the electrolysis of water
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Surfactant behaviour of metallacarboranes. A study based on the electrolysis of water

机译：金属碳硼烷的表面活性剂行为。基于水电解的研究

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[3,3'-Co(1,2-C_2B_9H_(11))2]~?, [1]~?, and its chloroderivatives have been described as displaying surfactant/ aggregation properties. We have studied their behaviour as electrolytes in the water electrolysis process. The electrolysis experiments support the surfactant behaviour of these compounds. These conclusions have been drawn on the grounds of the intensity/voltage (I/V) curves of water splitting into H_2 and O_2 of aqueous solutions in which the electrolytes have been tested at the same concentration. The I/V curves have permitted us to map and group the different electrolytes studied in this work. Three differentiated zones have been observed: one for true electrolytes, NO_3~? and ClO_4~?; a second one for intermediate electrolytes, BF_4~? and p-toluenesulfonate (PTS); and a third having the surfactant dodecylbenzenesulfonate (DBS), [1]~? and its chloroderivatives. The incorporation into the study of the chloroderivatives of [1]~? has allowed us to correlate molecular structure features with aqueous performance. The studied chloroderivatives perform better as electrolytes in accordance with the descending order of available B-H groups. This comes from the higher capacity to generate B-H?H-C_c dihydrogen bonds in the non- or less-halogenated molecules, considered one of the main reasons for the generation of the aggregates. In order to generate B-H?H-C_c dihydrogen bonds the H-C_c from the carborane cluster is needed. [B_(12)H_(12)]~(2~?) was chosen to prove the hypothesis as it has B-H units but lacks H-C_c units. Consequently, it should not produce self-assembling motifs, as is the case. [B_(12)H_(12)]~(2~?) has an aqueous behaviour similar to SO_4~(2~?).
机译：已经描述了[3，3′-Co（1,2-C_2B_9H_（11））2]-，[1]-α及其氯代衍生物表现出表面活性剂/聚集性质。我们已经研究了它们在水电解过程中作为电解质的行为。电解实验支持了这些化合物的表面活性剂行为。这些结论是根据水分裂成水溶液的H_2和O_2的强度/电压（I / V）曲线得出的，在这些水溶液中以相同的浓度测试了电解质。 I / V曲线使我们能够绘制和分组这项工作中研究的不同电解质。已经观察到三个不同的区域：一个是真正的电解质，NO_3〜？和ClO_4〜?;第二种用于中间电解质BF_4〜？和对甲苯磺酸盐（PTS）;第三种具有表面活性剂十二烷基苯磺酸盐（DBS），[1]〜？及其氯代衍生物。 [1]〜？的氯衍生物的掺入研究使我们能够将分子结构特征与水性性能相关联。按照可用的B-H基团的降序排列，所研究的氯代衍生物作为电解质的性能更好。这是由于在未卤化程度或卤化程度较低的分子中具有更高的生成B-H？H-C_c二氢键的能力，这被认为是产生聚集体的主要原因之一。为了产生B-H 2 H-C_c二氢键，需要来自碳硼烷簇的H-C_c。选择[B_（12）H_（12）]〜（2〜？）来证明该假设，因为它具有B-H单位但缺少H-C_c单位。因此，它不应像情况那样产生自组装的图案。 [B_（12）H_（12）]〜（2〜？）具有类似于SO_4〜（2〜？）的水行为。

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