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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/14269

Title: Metal-Organic Coordination Network Thin Film by Surface-Induced Assembly
Authors: Laokroekkiat, Salinthip
Hara, Mitsuo
Nagano, Shusaku
Nagao, Yuki
Keywords: Porphyrin
Self-assembly
Multilayer thin film
Surface-Induced Assembly (SIA)
Organized structure
Issue Date: 2016-06-21
Publisher: American Chemical Society
Magazine name: Langmuir
Volume: 32
Number: 26
Start page: 6648
End page: 6655
DOI: 10.1021/acs.langmuir.6b01251
Abstract: The growth of metal-organic coordination network thin films on surfaces has been pursued extensively and intensively to manipulate the molecular arrangement. For this study, the oriented multilayer thin films based on porphyrinic nano-architecture were synthesized toward metal-organic coordination networks using surface-induced assembly (SIA). Nanoscale molecular thin films were prepared at room temperature using cobalt(II) ion and porphyrin building blocks as precursors. Stepwise growth with a highly uniform layer was characterized using UV-Vis, AFM, IR, and XPS studies. The grazing incidence small angle X-ray scattering (GI-SAXS) and X-ray reflectivity (XRR) results remarkably suggested a periodic structure in in-plane (IP) direction with constant and high mass density (ca. 1.5 g/cm^3) throughout the multilayer formation. We propose that orientation of the porphyrin macrocycle plane with a hexagonal packed model by single anchoring mode was tilted approximately 60° with respect to the surface substrate. It is noteworthy that the well-organized structure of porphyrin-based macrocyclic framework on the amine-terminated surface substrate can be achieved efficiently using a simple SIA approach under mild synthetic conditions. The synthesized thin film provides a different structure from that obtained using bulk synthesis. This result suggests that the SIA technique can control not only the film thickness, but also the structural arrangement on the surface. This report of our research provides insight into the ordered porphyrin-based metal-organic coordination network thin films, which opens up opportunities for exploration of unique thin film materials for diverse applications.
Rights: Salinthip Laokroekkiat, Mitsuo Hara, Shusaku Nagano, and Yuki Nagao, Langmuir, 2016, 32(26), pp.6648-6655. This document is the unedited author's version of a Submitted Work that was subsequently accepted for publication in Langmuir, copyright (c) American Chemical Society after peer review. To access the final edited and published work, see http://dx.doi.org/10.1021/acs.langmuir.6b01251
URI: http://hdl.handle.net/10119/14269
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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