化学
核磁共振波谱
曲面(拓扑)
扩展X射线吸收精细结构
无定形固体
铂金
金属有机化学
化学物理
表面科学
光谱学
极化(电化学)
金属
结晶学
物理化学
分析化学(期刊)
催化作用
晶体结构
吸收光谱法
立体化学
有机化学
几何学
数学
物理
量子力学
作者
Pierrick Berruyer,Moreno Lelli,Matthew P. Conley,Daniel L. Silverio,Cory M. Widdifield,Georges Siddiqi,David Gajan,Anne Lesage,Christophe Copéret,Lyndon Emsley
摘要
The spatial arrangement of atoms is directly linked to chemical function. A fundamental challenge in surface chemistry and catalysis relates to the determination of three-dimensional structures with atomic-level precision. Here we determine the three-dimensional structure of an organometallic complex on an amorphous silica surface using solid-state NMR measurements, enabled through a dynamic nuclear polarization surface enhanced NMR spectroscopy approach that induces a 200-fold increase in the NMR sensitivity for the surface species. The result, in combination with EXAFS, is a detailed structure for the surface complex determined with a precision of 0.7 Å. We observe a single well-defined conformation that is folded toward the surface in such a way as to include an interaction between the platinum metal center and the surface oxygen atoms.
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