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

Mégane Muschi (1) , Anusha Lalitha (2) , Saad Sene (1) , Damien Aureau (3) , Mathieu Frégnaux , Imène Esteve (4) , Lucie Rivier , Naseem Ramsahye (2) , Sabine Devautour‐vinot (2) , Clémence Sicard (3) , Nicolas F Menguy (4) , Christian Serre , Guillaume Maurin , Nathalie Steunou (3)

1 IMAP - Institut des Matériaux Poreux de Paris
2 ICGM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
3 ILV - Institut Lavoisier de Versailles
4 IMPMC - Institut de minéralogie, de physique des matériaux et de cosmochimie

Here we propose an innovative strategy 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 m were found to preferentially grow along the [001] crystallographic direction. Advanced characterization tools (electron diffraction, TEM, STEM-HAADF, SEM, XPS) and molecular modelling 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.

Domaines: Chimie

Mégane Muschi, Anusha Lalitha, Saad Sene, Damien Aureau, Mathieu Frégnaux, et al.. Formation of a Single‐Crystal Aluminum‐Based MOF Nanowire with Graphene Oxide Nanoscrolls as Structure‐Directing Agents. Angewandte Chemie International Edition, 2020, 59 (26), pp.10353-10358. ⟨10.1002/anie.202000795⟩. ⟨hal-03080047⟩