Formation of Metal-Organic Frameworks on a Metal Ion-Doped Polymer Substrate: In-Depth Time-Course Analysis Using Scanning Electron Microscopy

Takaaki Tsuruoka; Manami Hata; Shoya Hirao; Takashi Ohhashi; Yohei Takashima; Kensuke Akamatsu

doi:10.1021/acs.langmuir.9b01676

Formation of Metal-Organic Frameworks on a Metal Ion-Doped Polymer Substrate: In-Depth Time-Course Analysis Using Scanning Electron Microscopy

Langmuir. 2019 Aug 13;35(32):10390-10396. doi: 10.1021/acs.langmuir.9b01676. Epub 2019 Jul 30.

Authors

Takaaki Tsuruoka¹, Manami Hata¹, Shoya Hirao¹, Takashi Ohhashi¹, Yohei Takashima¹, Kensuke Akamatsu¹

Affiliation

¹ Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST) , Konan University , 7-1-20 Minatojimaminami , Chuo-ku, Kobe 650-0047 , Japan.

PMID: 31314990
DOI: 10.1021/acs.langmuir.9b01676

Abstract

The growth of metal-organic frameworks (MOFs) on a metal ion-doped polymer as a precursor and support substrate was investigated based on mechanistic and kinetic analyses. The studies were performed by varying the reaction temperature and the concentrations of the organic ligand and nucleation-promoted additive. Using the NH₂-MIL-53(Al) framework as a model system, a systematic study of the mechanism of formation of tetragonal- and rod-shaped NH₂-MIL-53(Al) crystals on the substrate was performed. The nucleation rate in the early stage of the reaction is a major factor in determining the surface morphology of the resultant NH₂-MIL-53(Al) crystal films, as confirmed by changing the concentration of organic ligands and by employing pyridine additives. These results provide a fundamental understanding of the influence of the nucleation rate on the ability to control the morphology and structure of MOF crystal films.