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  • Highly crystalline nanofilm by layering of porphyrin metal-organic framework sheets.

Highly crystalline nanofilm by layering of porphyrin metal-organic framework sheets.

Journal of the American Chemical Society (2011-04-01)
Soichiro Motoyama, Rie Makiura, Osami Sakata, Hiroshi Kitagawa
ABSTRACT

Layer-structured metal-organic framework (MOF) nanofilms (NAFS-2) consisting of 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin (H(2)TCPP) molecules and copper ion metal linkers were assembled on a gold or a silicon surface by applying a solution-based layer-by-layer growth technique coupled with the Langmuir-Blodgett method. Synchrotron X-ray diffraction measurements showed that NAFS-2 exhibits highly crystalline order in both the in-plane and out-of-plane orientations. Each MOF sheet (monolayer) adheres without pillaring units, and the nanofilm maintains its highly crystalline order above 200 °C. The results provide an excellent demonstration of how to exercise in a facile way fine control of the assembly of molecule-based hybrid objects and their thermal stability, which is a key issue for the future use of MOFs in potential applications in nanodevices.

MATERIALS
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Product Description

Sigma-Aldrich
4,4′,4′′,4′′′-(Porphine-5,10,15,20-tetrayl)tetrakis(benzoic acid), Dye content 75 %