Porous Two-Dimensional Monolayer Metal-Organic Framework Material and Its Use for the Size-Selective Separation of Nanoparticles.

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ACS applied materials & interfaces, ISSN: 1944-8252, Vol: 9, Issue: 33, Page: 28107-28116

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Jiang, Yi; Ryu, Gyeong Hee; Joo, Se Hun; Chen, Xiong; Lee, Sun Hwa; Chen, Xianjue; Huang, Ming; Wu, Xiaozhong; Luo, Da; Huang, Yuan; Lee, Jeong Hyeon; Wang, Bin; Zhang, Xu; Kwak, Sang Kyu; Lee, Zonghoon; Ruoff, Rodney S. Show More Hide
American Chemical Society (ACS); AMER CHEMICAL SOC
Materials Science; MOF; planar complexation; separation; size-selective; β-diketone
article description
Rational bottom-up construction of two-dimensional (2D) covalent or noncovalent organic materials with precise structural control at the atomic or molecular level remains a challenge. The design and synthesis of metal-organic frameworks (MOFs) based on new building blocks is of great significance in achieving new types of 2D monolayer MOF films. Here, we demonstrate that a complexation between copper(II) ions and tri(β-diketone) ligands yields a novel 2D MOF structure, either in the form of a powder or as a monolayer film. It has been characterized by Fourier transform infrared, Raman, ultraviolet-visible, X-ray photoelectron, and electron paramagnetic resonance spectroscopies. Selected area electron diffraction and powder X-ray diffraction results show that the MOF is crystalline and has a hexagonal structure. A MOF-based membrane has been prepared by vacuum filtration of an aqueous dispersion of the MOF powder onto a porous Anodisc filter having pore size 0.02 μm. The porous MOF membrane filters gold nanoparticles with a cutoff of ∼2.4 nm.