Investigation of the surface chemistry of phosphine-stabilized ruthenium nanoparticles--an advanced solid-state NMR study.
Investigation of the surface chemistry of phosphine-stabilized ruthenium nanoparticles--an advanced solid-state NMR study.
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DOI：
10.1039/c3cp52927d
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发表时间：
2013-09
期刊：
影响因子：
--
通讯作者：
T. Gutmann;E. Bonnefille;H. Breitzke;P. Debouttière;K. Philippot;R. Poteau;G. Buntkowsky;B. Chaudret
中科院分区：
文献类型：
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作者：
T. Gutmann;E. Bonnefille;H. Breitzke;P. Debouttière;K. Philippot;R. Poteau;G. Buntkowsky;B. Chaudret
（31）P-（13）C REDOR NMR测量允许膦稳定的钌纳米颗粒（RuNP）表面上的稳定配体和一氧化碳（CO）分子之间的距离的合理近似。所研究的系统是RuNPs在1-2 nm的尺寸范围内稳定与1，3，5-三氮杂-7-磷杂金刚烷（PTA）或三苯基膦（PPh 3）和暴露于CO气氛。这项研究揭示了一些光的CO和膦分子之间的相互作用，以及它们的结合几何形状上的RuNPs的表面上。由于配体的位置和流动性的信息是宝贵的纳米粒子的化学和催化性能的理解，这些结果支持使用先进的NMR工具来研究其表面化学的兴趣。
(31)P-(13)C REDOR NMR measurements allowed a reasonable approximation of distances between stabilizing ligands and carbon monoxide (CO) molecules on the surface of phosphine-stabilized ruthenium nanoparticles (RuNPs). The studied systems are RuNPs in the size range of 1-2 nm stabilized with 1,3,5-triaza-7-phosphaadamantane (PTA) or triphenylphosphine (PPh3) and exposed to a CO atmosphere. This study sheds some light on the interactions between CO and phosphine molecules as well as on their binding geometries on the surface of the RuNPs. As information on the ligand location and mobility is precious for the understanding of the chemical and catalytic properties of nanoparticles, these results support the interest of using sophisticated NMR tools to investigate their surface chemistry.