Formation of a Single-Crystal Aluminum-Based MOF Nanowire with Graphene Oxide Nanoscrolls as Structure-Directing Agents.

Authors :: Muschi M
Lalitha A
Sene S
Aureau D
Fregnaux M
Esteve I
Rivier L
Ramsahye N
Devautour-Vinot S
Sicard C
Menguy N
Serre C
Maurin G
Steunou N
Source :: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2020 Jun 22; Vol. 59 (26), pp. 10353-10358. Date of Electronic Publication: 2020 Apr 14.
Publication Year :: 2020
Abstract: An innovative strategy is proposed to synthesize single-crystal nanowires (NWs) of the Al <superscript>3+</superscript> dicarboxylate MIL-69(Al) MOF by using graphene oxide nanoscrolls as structure-directing agents. MIL-69(Al) NWs with an average diameter of 70±20 nm and lengths up to 2 μm were found to preferentially grow along the [001] crystallographic direction. Advanced characterization methods (electron diffraction, TEM, STEM-HAADF, SEM, XPS) and molecular modeling revealed the mechanism of formation of MIL-69(Al) NWs involving size-confinement and templating effects. The formation of MIL-69(Al) seeds and the self-scroll of GO sheets followed by the anisotropic growth of MIL-69(Al) crystals are mediated by specific GO sheets/MOF interactions. This study delivers an unprecedented approach to control the design of 1D MOF nanostructures and superstructures.<br /> (© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)

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