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Article Dans Une Revue Journal of the American Chemical Society Année : 2017

Three-Dimensional Structure Determination of Surface Sites

Résumé

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 angstrom. 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.

Dates et versions

hal-01519030 , version 1 (05-05-2017)

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Citer

Pierrick Berruyer, Moreno Lelli, Matthew P. Conley, Daniel L Silverio, M. Widdifield Cory, et al.. Three-Dimensional Structure Determination of Surface Sites. Journal of the American Chemical Society, 2017, 139 (2), pp.849-855. ⟨10.1021/jacs.6b10894⟩. ⟨hal-01519030⟩
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