Ultrathin inorganic molecular nanowire based on polyoxometalates

Zhenxin Zhang, Toru Murayama, Masahiro Sadakane, Hiroko Ariga, Nobuhiro Yasuda, Norihito Sakaguchi, Kiyotaka Asakura and Wataru Ueda ()
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Zhenxin Zhang: Catalysis Research Center, Hokkaido University
Toru Murayama: Catalysis Research Center, Hokkaido University
Masahiro Sadakane: Graduate School of Engineering, Hiroshima University
Hiroko Ariga: Catalysis Research Center, Hokkaido University
Nobuhiro Yasuda: Japan Synchrotron Radiation Research Institute/SPring-8
Norihito Sakaguchi: High Voltage Electron Microscope Laboratory, Center for Advanced Research of Energy and Materials, Faculty of Engineering, Hokkaido University
Kiyotaka Asakura: Catalysis Research Center, Hokkaido University
Wataru Ueda: Catalysis Research Center, Hokkaido University

Nature Communications, 2015, vol. 6, issue 1, 1-10

Abstract: Abstract The development of metal oxide-based molecular wires is important for fundamental research and potential practical applications. However, examples of these materials are rare. Here we report an all-inorganic transition metal oxide molecular wire prepared by disassembly of larger crystals. The wires are comprised of molybdenum(VI) with either tellurium(IV) or selenium(IV): {(NH4)2[XMo6O21]}n (X=tellurium(IV) or selenium(IV)). The ultrathin molecular nanowires with widths of 1.2 nm grow to micrometre-scale crystals and are characterized by single-crystal X-ray analysis, Rietveld analysis, scanning electron microscopy, X-ray photoelectron spectroscopy, ultraviolet–visible spectroscopy, thermal analysis and elemental analysis. The crystals can be disassembled into individual molecular wires through cation exchange and subsequent ultrasound treatment, as visualized by atomic force microscopy and transmission electron microscopy. The ultrathin molecular wire-based material exhibits high activity as an acid catalyst, and the band gap of the molecular wire-based crystal is tunable by heat treatment.

Date: 2015
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DOI: 10.1038/ncomms8731

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