Strongly electron-withdrawing molecules can form self-assembled metal-organic structures on metal surfaces by extracting metal atoms from the step or terrace sites on single crystal surfaces.  We describe the formation of metal-organic chains on single crystal Au, Ag, and Cu surfaces.  Low-temperature STM imaging of the formed chains shows evidence for facile large-scale chain motion, which is some cases corresponds to nanometer scale vibration. Upon adsorption of CO2 molecules at 77 K, we find pronounced surface chain reorganization whereby adjacent chains capture CO2 molecules in <1 nm gaps between them. Imaging at 4 K enables molecule-resolved imaging of CO2 molecule condensation on single chains and in the gaps between the chains.  Electronic structure calculations describe the electronic properties of the metal-organic chains and the chain-CO2 molecule interactions. The condensed metal-organic frameworks on noble metal surfaces may serve as platforms for the study of electron and photon-induced reduction of CO2 with atomic spatial and femtosecond temporal resolution.

Atomic scale imaging of CO<sub>2</sub> capture by metal-organic frameworks

246th National Meeting (2013)

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Atomic scale imaging of CO2 capture by metal-organic frameworks

Atomic scale imaging of CO₂ capture by metal-organic frameworks