Benjalal Y, Bonvoisin J, Bouju X. Unraveling the molecular conformations of a single ruthenium complex adsorbed on the Ag(111) surface by calculations.
Phys Chem Chem Phys 2019;
21:10022-10027. [PMID:
31041976 DOI:
10.1039/c9cp01244c]
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Abstract
The tris(dibenzoylmethanato)ruthenium (Ru(dbm)3) molecule has recently been characterized by scanning tunneling microscopy (STM) experiments upon adsorption on Ag(111). The adsorbed Ru(dbm)3 molecule shows two conformations with respect to the [11[combining macron]0] direction of the substrate, one with a three-lobed feature and the other one with a bi-lobed structure. For each of these structures, the molecule can take two geometries (states). Molecular mechanics calculations in a semi-empirical framework and STM calculated images reveal that these states on the substrate originate from the enantiomer of the Ru(dbm)3 molecule in the case of three-lobed structure and from the rotation of the two phenyls in the top dbm moities for the bi-lobed form.
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