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

An innovative strategy is proposed to synthesize single‐crystal nanowires (NWs) of the Al3+ 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 alo...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2020-06, Vol.59 (26), p.10353-10358
Main Authors: Muschi, Mégane, Lalitha, Anusha, Sene, Saad, Aureau, Damien, Fregnaux, Mathieu, Esteve, Imène, Rivier, Lucie, Ramsahye, Naseem, Devautour‐Vinot, Sabine, Sicard, Clémence, Menguy, Nicolas, Serre, Christian, Maurin, Guillaume, Steunou, Nathalie
Format: Article
Language:English
Subjects:
Aluminum
Chemical Sciences
Crystal structure
Crystallography
Crystals
Electron diffraction
Graphene
graphene oxide
metal–organic frameworks
Molecular modelling
Nanotechnology
Nanowires
Seeds
self-assembly
Sheets
Superstructures
templates
X ray photoelectron spectroscopy
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Summary:An innovative strategy is proposed to synthesize single‐crystal nanowires (NWs) of the Al3+ 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. Single‐crystal nanowires (NWs) of the Al3+ dicarboxylate MIL‐69(Al) MOF were synthesized by using graphene oxide nanoscrolls as structure‐directing agents. The interplay between multimodal characterization techniques and molecular modeling unravels their mechanism of formation involving size‐confinement and specific interactions.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202000795