3D Covalent Organic Frameworks of Interlocking 1D Square Ribbons.

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ID: 519
2018
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Abstract
A new mode of mechanical entanglement in extended structures is described where 1D organic ribbons of corner-sharing squares are mutually interlocked to form 3D woven covalent organic framework-500, COF-500. Reaction of aldehyde-functionalized tetrahedral Cu(PDB)2PO2Ph2 complexes (PDB = 4,4'-(1,10-phenanthroline-2,9-diyl)dibenzaldehyde) with rectangular tetratopic ETTBA (4',4''',4''''',4'''''''-(ethene-1,1,2,2-tetrayl)tetrakis([1,1'-biphenyl]-4-amine)) linkers through imine condensation, yielded a crystalline porous metalated COF, COF-500-Cu, with pts topology. Upon removal of the Cu(I) ions, the individual 1D square ribbons in the demetalated form (COF-500) are held together only by mechanical interlocking of rings that allows their collective movement to produce a narrow-pore form as evidenced by nitrogen ad-sorption and solid-state photoluminescence studies. When exposed to tetrahydrofuran vapor, the interlocking ribbons can dynamically move away from each other to reopen up the structure. The structural integrity of COF-500 is maintained during its dynamics because the constituent square ribbons cannot part company due to spatial confinement imparted by their interlocking nature.
Reference Key
liu20183d Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Liu, Yuzhong;Diercks, Christian S;Ma, Yanhang;Lyu, Hao;Zhu, Chenhui;Alshmimri, Sultan A;Alshihri, Saeed;Yaghi, Omar M;
Journal Journal of the American Chemical Society
Year 2018
DOI
10.1021/jacs.8b12177
URL
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