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Signature of Metallic Behavior in the Metal–Organic Frameworks M<sub>3</sub>(hexaiminobenzene)<sub>2</sub> (M = Ni, Cu)

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posted on 2017-09-14, 00:00 authored by Jin-Hu Dou, Lei Sun, Yicong Ge, Wenbin Li, Christopher H. Hendon, Ju Li, Sheraz Gul, Junko Yano, Eric A. Stach, Mircea Dincă
The two-dimensionally connected metal–organic frameworks (MOFs) Ni<sub>3</sub>(HIB)<sub>2</sub> and Cu<sub>3</sub>(HIB)<sub>2</sub> (HIB = hexaiminobenzene) are bulk electrical conductors and exhibit ultraviolet-photoelectron spectroscopy (UPS) signatures expected of metallic solids. Electronic band structure calculations confirm that in both materials the Fermi energy lies in a partially filled delocalized band. Together with additional structural characterization and microscopy data, these results represent the first report of metallic behavior and permanent porosity coexisting within a metal–organic framework.

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