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MOF thin films with bi-aromatic linkers grown by molecular layer deposition

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Abstract

Thin films of metal–organic frameworks (MOFs) are promising for a wide range of applications including membranes for separations and sensor materials in microelectronics. Growth of such thin films using atomic/molecular layer deposition (ALD/MLD) has recently been demonstrated; however, the range of examples is still narrow. Here, we expand the repertory of gas-phase MOF thin film synthesis by ALD/MLD to include 2,6-naphthalenedicarboxylate (2,6-NDC) and biphenyl-4,4′-dicarboxylate (BP-4,4′-DC) as organic linkers. The films, which were deposited using ZrCl4 and either H2–2,6-NDC or H2–BP-4,4′-DC, were amorphous and formed crystalline MOF-structures when treated with acetic acid vapour at 160 °C. The film growth was investigated using in situ quartz crystal microbalance (QCM) measurements, and was in addition characterized using spectroscopic ellipsometry (SE), photoluminescence (PL), scanning electron microscopy (SEM), grazing incidence X-ray diffraction (GIXRD) and X-ray reflectivity (XRR). We further performed introductory investigations into a selection of possible future applications of these films, due to their porosity, luminescent and antibacterial properties. Expanding the repertory of MOF synthesis by ALD/MLD to include longer linkers such as 2,6-NDC and BP-4,4′-DC enables synthesis of thin films with a larger range of pore sizes.

Graphical abstract: MOF thin films with bi-aromatic linkers grown by molecular layer deposition

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Article information


Submitted
23 Aug 2019
Accepted
27 Nov 2019
First published
13 Jan 2020

This article is Open Access

J. Mater. Chem. A, 2020, Advance Article
Article type
Paper

MOF thin films with bi-aromatic linkers grown by molecular layer deposition

K. B. Lausund, M. S. Olsen, P. Hansen, H. Valen and O. Nilsen, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/C9TA09303F

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