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One‐, Two‐ and Three‐Periodic Metal–Organic Rotaxane Frameworks (MORFs): Linking Cationic Transition‐Metal Nodes with an Anionic Rotaxane Ligand
Author(s) -
Vukotic V. Nicholas,
Loeb Stephen J.
Publication year - 2010
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201002542
Subject(s) - rotaxane , cationic polymerization , ligand (biochemistry) , metal organic framework , metal , transition metal , chemistry , crystallography , materials science , stereochemistry , supramolecular chemistry , polymer chemistry , receptor , organic chemistry , crystal structure , catalysis , biochemistry , adsorption
A new singly charged pyridinium axle was prepared and combined with disulfonated dibenzo[24]crown‐8 ether to form a [2]pseudorotaxane. The reaction of this new, anionic ligand with Zn II ions, under various crystallization conditions, resulted in the formation of three metal–organic rotaxane framework (MORF) solids; a one‐periodic ML coordination polymer and two, two‐periodic ML 2 square grid frameworks. The layers of square grids can be pillared to create full three‐perioidic MORF structures, which have completely neutral frameworks and are porous. These three‐perioidic materials represent the first examples of neutral porous MOFs in which one (or more) of the linkers is a mechanically interlocked molecule (MIM).