Probing C-O bond activation on gas-phase transition metal clusters: infrared multiple photon dissociation spectroscopy of Fe, Ru, Re, and W cluster CO complexes.
Probing C-O bond activation on gas-phase transition metal clusters: infrared multiple photon dissociation spectroscopy of Fe, Ru, Re, and W cluster CO complexes.
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DOI：
10.1063/1.3257687
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发表时间：
2009-11
期刊：
影响因子：
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通讯作者：
Jonathan T. Lyon;P. Gruene;A. Fielicke;G. Meijer;D. Rayner
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文献类型：
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作者：
Jonathan T. Lyon;P. Gruene;A. Fielicke;G. Meijer;D. Rayner
通过红外多光子解离光谱研究一氧化碳与铁、钌、铼和钨簇的结合。 CO 拉伸模式用于探测 CO 分子与金属簇的相互作用，从而激活 C-O 键。研究发现 CO 以分子形式吸附到铁簇的顶部位置。在钌和铼簇上，它也以分子方式结合。就钌而言，结合主要是在顶部位点，然而，两种金属也观察到更高配位的CO结合，并且对于含有超过九个原子的铼簇来说变得普遍。钨簇对分子与解离 CO 结合表现出明显的尺寸依赖性。这种行为表示与早期过渡金属（例如钽）上的纯解离 CO 结合的交叉。
The binding of carbon monoxide to iron, ruthenium, rhenium, and tungsten clusters is studied by means of infrared multiple photon dissociation spectroscopy. The CO stretching mode is used to probe the interaction of the CO molecule with the metal clusters and thereby the activation of the C-O bond. CO is found to adsorb molecularly to atop positions on iron clusters. On ruthenium and rhenium clusters it also binds molecularly. In the case of ruthenium, binding is predominantly to atop sites, however higher coordinated CO binding is also observed for both metals and becomes prevalent for rhenium clusters containing more than nine atoms. Tungsten clusters exhibit a clear size dependence for molecular versus dissociative CO binding. This behavior denotes the crossover to the purely dissociative CO binding on the earlier transition metals such as tantalum.