Reactivity of a Ruthenium-Carbonyl Complex in the Methanol Dehydrogenation Reaction.

Reactivity of a Ruthenium-Carbonyl Complex in the Methanol Dehydrogenation Reaction.
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DOI:
10.1002/cctc.201600709
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发表时间:
2016-09-07
期刊:
影响因子:
4.5
通讯作者:
Reek, Joost N. H.
Reek, Joost N. H.
中科院分区:
化学3区
文献类型:
--
作者:
van de Watering, Fenna F.;Lutz, Martin;Dzik, Wojciech I.;de Bruin, Bas;Reek, Joost N. H.

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寻找从甲醇中释放分子氢的新催化剂在可持续能源载体的发展背景下具有高度相关性。本文中,我们报道了钌配合物Ru(salbinapht)(CO)(Pi-Pr 3){salbinapht=2-[({2′-[(2-羟基苄基)氨基]-[1,1 ′-联萘]-2-基}亚氨基)甲基]苯酚}(2)在碱和水存在下催化甲醇脱氢反应,生成H2、甲酸盐和碳酸盐。二氢是唯一检测到的气体,在82 °C时的转换频率高达55 h−1。 配合物2带有一个羰基配体,这是来自甲醇,通过标记实验证明。羰基配体可以用碱处理以形成甲酸盐(HCOO−)和氢。活性物质的性质进一步显示不含CO配体,但可能仍具有Salen衍生的配体。在催化过程中,偶尔观察到Ru(CO)2(H)2(P-iPr 3)2的形成,其也是活性甲醇脱氢催化剂。
Finding new catalysts for the release of molecular hydrogen from methanol is of high relevance in the context of the development of sustainable energy carriers. Herein, we report that the ruthenium complex Ru(salbinapht)(CO)(Pi‐Pr3) {salbinapht=2‐[({2′‐[(2‐hydroxybenzyl)amino]‐[1,1′‐binaphthalen]‐2‐yl}imino)methyl]phenolato} (2) catalyzes the methanol dehydrogenation reaction in the presence of base and water to yield H2, formate, and carbonate. Dihydrogen is the only gas detected and a turnover frequency up to 55 h−1 at 82 °C is reached. Complex 2 bears a carbonyl ligand that is derived from methanol, as is demonstrated by labeling experiments. The carbonyl ligand can be treated with base to form formate (HCOO−) and hydrogen. The nature of the active species is further shown not to contain a CO ligand but likely still possesses a salen‐derived ligand. During catalysis, formation of Ru(CO)2(H)2(P‐iPr3)2 is occasionally observed, which is also an active methanol dehydrogenation catalyst.
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