Formation of a Single‐Crystal Aluminum‐Based MOF Nanowire with Graphene Oxide Nanoscrolls as Structure‐Directing Agents. (15th April 2020)

• Record Type: Journal Article
• 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
• Is Part Of: Angewandte Chemie. Volume 132:Number 26(2020)
• Page Start: 10439
• Page End: 10444
• Publication Date: 2020-04-15
• Subjects: graphene oxide -- metal–organic frameworks -- nanowires -- self-assembly -- templates; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202000795
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: An innovative strategy is proposed to synthesize single‐crystal nanowires (NWs) of the Al 3+ 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. Abstract : Single‐crystal nanowires (NWs) of the Al 3+ 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.