Temperature-controlled metal/ligand stoichiometric ratio in Ag-TCNE coordination networks

The Journal of Chemical Physics
Jonathan Rodríguez-FernándezRoberto Otero

Abstract

The deposition of tetracyanoethylene (TCNE) on Ag(111), both at Room Temperature (RT, 300 K) and low temperatures (150 K), leads to the formation of coordination networks involving silver adatoms, as revealed by Variable-Temperature Scanning Tunneling Microscopy. Our results indicate that TCNE molecules etch away material from the step edges and possibly also from the terraces, which facilitates the formation of the observed coordination networks. Moreover, such process is temperature dependent, which allows for different stoichiometric ratios between Ag and TCNE just by adjusting the deposition temperature. X-ray Photoelectron Spectroscopy and Density Functional Theory calculations reveal that charge-transfer from the surface to the molecule and the concomitant geometrical distortions at both sides of the organic/inorganic interface might facilitate the extraction of silver atoms from the step-edges and, thus, its incorporation into the observed TCNE coordination networks.

References

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Citations

Mar 27, 2018·Chemical Communications : Chem Comm·Jonathan Rodríguez-FernándezJeppe V Lauritsen
Apr 21, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·María Blanco-ReyAndres Arnau
Sep 15, 2017·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Tao WangJunfa Zhu
May 31, 2018·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Ada Della PiaGiovanni Costantini
Nov 6, 2018·The Journal of Chemical Physics·Katrine L SvaneLars Diekhöner
Jun 25, 2020·The Journal of Physical Chemistry Letters·Xue ZhangTaeyoung Choi

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