MOF‐on‐MOF: Oriented Growth of Multiple Layered Thin Films of Metal–Organic Frameworks

Ikigaki, Ken; Okada, K.; Tokudome, Yasuaki; Toyao, Takashi; Falcaro, Paolo; Doonan, Christian J.; Takahashi, Masahide

doi:10.1002/ange.201901707

Cited by 40 publications

(20 citation statements)

References 34 publications

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“…The presence of multiple layers of different MOFs can enhance selectivity for analytes of interest by selectively absorbing analytes of interest and blocking potential interferants. [220][221][222]…”

Section: Composite Mof Materialsmentioning

confidence: 99%

Metal–organic framework thin films as versatile chemical sensing materials

2021

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Section: Composite Mof Materialsmentioning

confidence: 99%

Metal–organic framework thin films as versatile chemical sensing materials

2021

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“…[ 21 ] One of the most economical and practical strategies for the large‐scale fabrication of MOFs film is the direct conversion of the ceramic precursors films into MOFs films at room temperature. [ 22–25 ] Herein, we design and construct a CuBDC nanosheet‐assembled frame (NAF) film using a heteroepitaxial growth method and set it as catalyst. The effective thickness for passage of molecules through the NAF film is reduced to the nanometer level (Figure 1e).…”

Section: Figurementioning

confidence: 99%

“…Previous work revealed that the heteroepitaxial growth mechanism would restrict the orientation of growth between the MOFs and copper hydroxide nanostrands surfaces, that is, the a and b axis of MOF crystals should align with the c and a axis of a copper hydroxide substrate, respectively (See Figure S11, Supporting Information, for details). [ 24,25 ] Moreover, the interplanar spacing (3.0 Å for (240) planes) and diffraction spots from (240) planes in the electron diffraction pattern confirm the heteroepitaxial growth of CuBDC NAF on copper hydroxide, which is in good agreement with previously reported results (Figure 2f,g). [ 24 ] To further validate the above mechanism for the construction of NAF, some other MOFs either with the Cu 2+ or the H 2 BDC ligand are synthesized via the same strategy (Figure S12, Supporting Information).…”

Section: Figurementioning

confidence: 99%

A Metal–Organic Framework Nanosheet‐Assembled Frame Film with High Permeability and Stability

et al. 2020

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including catalysis, [2,3] sensing, [4,5] storage and separation, [6,7] devices, [8] drug delivery and imaging. [9] As one of the most valuable forms for practical use, MOF-based films have attracted more and more interest because they could serve as highly versatile, low-energy alternative materials for chemical sensors, separators, and catalysts. [10][11][12] In MOF film-based applications, the selection of MOFs with pores of appropriate size, shape, and chemistry could allow for adsorption and separation with high selectivity. However, the thick MOF films still suffer from low flux due to the low diffusion rates of molecules in the long and narrow channels of MOFs (Figure 1a,b). [13,14] Pioneering efforts have demonstrated that preparing ultrathin MOF nanosheet (NS)-based film is an effective strategy for maximizing the permeance of MOF films. [12] For example, ultrathin Zn 2 (bim) 4 NS-and MAMS-1 NSbased nm-thick molecular sieving membranes showed high gas permeation flux. [15,16] According to Fick's Law, the Knudsen diffusion flow passing through the micropores of MOFs follows the rule: [17] J ∝ 1/L, where J-permeability; L-film thickness. Therefore, the thinner the prepared film, the higher its permeability (Figure 1c). The construction of MOF NSs in very thin layers benefits the permeance of molecules, but restricts mechanical stability and cyclic utilization due to the very low elastic modulus of the MOF NSs. The soft nanosheets are always suffering from severe structure deterioration or fragmentation during exfoliation, application, and recollection. This greatly limits their applications in some cases (Figure 1d). [18,19] Our previous study revealed that while the NSs are assembled into an intersecting structure, the stress or strain can be effectively distributed, thus the NSs-based structure obtaining high mechanical stability. [20] This stimulates us to synthesize thin MOF NSs-based films with high permeance and assemble the MOF NSs into frame film structure with high mechanical stability.Numerous strategies for the fabrication of continuously MOFs films, composed of an uninterrupted, pure layer have been developed. [21] One of the most economical and practical strategies for the large-scale fabrication of MOFs film is the direct conversion of the ceramic precursors films into MOFs films at room temperature. [22][23][24][25] Herein, we design and construct a CuBDC nanosheet-assembled frame (NAF) film using a heteroepitaxial growth method and set it as catalyst. The effective thickness for passage of molecules through the NAF film is reduced to the nanometer level (Figure 1e). Impressively, The engineering of metal-organic frameworks (MOFs) into membranes and films is being investigated, to transform laboratory-synthesized MOFs into industrially viable products for a range of attractive applications. However, rational design and construction of highly permeable MOF thin films, without trade-offs in terms of structural mechanical stability, remains a significant challenge. Herein, a simple, general str...

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“…via adsorption of self-assembled monolayers, SAMs) have exhibited a high degree of orientation, tunable thickness, and high structural quality often exceeding that of bulk MOF materials. [54][55][56] Although the application of the lbl scheme to be realized highly oriented γCD-MOF appears to be straightforward, no successful realization has been reported so far. A first challenge in this context is the fact that so far a successful application of the lbl method using aqueous conditions has not been reported.…”

Section: Introductionmentioning

confidence: 99%

Surface-Oriented Assembly of Cyclodextrin Metal–Organic Framework Film for Enhanced Peptide-Enantiomers Sensing

Chang

Weidler

et al. 2022

CCS Chem

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Oriented metal-organic frameworks (MOFs) films are attracting great attention due to their fascinating physicochemical properties and unique functionalities. Here, we first report an [110]-oriented biomolecule γcyclodextrin (γCD) MOF films with arrayed CD channels running perpendicular to the substrate surface. This sophisticated architecture can be realized by combining liquid phase eptiaxal layer-by-layer (lbl) methods with a γCD-based thiol self-assembled monolayers (SAMs) functionalized surface. This first demonstration of the lbl method for MOF growth from aqueous conditions yielded oriented, highly homogeneous, and chiral γCD-SURMOFs (surface-coordinated MOFs) with tunable thickness. Using a quartz crystal microbalance (QCM) to monitor adsorption of biomolecules, we demonstrate that γCD-SURMOF provides highly-efficient recognition of tripeptides enantiomers (Tyr-(L-Ala)-Phe vs. Tyr-(D-Ala)-Phe), clearly outperforming γCD(SH) 8 SAMs as well as polycrystalline, mixed-orientations γCD-MOF film. The presence of well-aligned γCD-channels opens up the chance to realize highly efficient transport channels with large adsorption capacity and fast loading, along with

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MOF‐on‐MOF: Oriented Growth of Multiple Layered Thin Films of Metal–Organic Frameworks

Cited by 40 publications

References 34 publications

Metal–organic framework thin films as versatile chemical sensing materials

Metal–organic framework thin films as versatile chemical sensing materials

A Metal–Organic Framework Nanosheet‐Assembled Frame Film with High Permeability and Stability

Surface-Oriented Assembly of Cyclodextrin Metal–Organic Framework Film for Enhanced Peptide-Enantiomers Sensing

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