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      Novel molecular building blocks based on the boradiazaindacene chromophore: applications in fluorescent metallosupramolecular coordination polymers

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      Author
      Bozdemir, Ö. A.
      Büyükcakir, O.
      Akkaya, E. U.
      Date
      2009
      Source Title
      Chemistry - A European Journal
      Print ISSN
      0947-6539
      Volume
      15
      Issue
      15
      Pages
      3830 - 3838
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      We designed and synthesized novel boradiazaindacene (Bodipy) derivatives that are appropriately functionalized for metal-ion-mediated supramolecular polymerization. Thus, ligands for 2-terpyridyl-, 2,6-terpyridyl-, and bipyridyl-functionalized Bodipy dyes were synthesized through Sonogashira couplings. These fluorescent building blocks are responsive to metal ions in a stoichiometry-dependent manner. Octahedral coordinating metal ions such as Zn II result in polymerization at a stoichiometry corresponding to two terpyridyl ligands to one Zn II ion. However, at increased metal ion concentrations, the dynamic equilibria are re-established in such a way that the monomeric metal complex dominates. The position of equilibria can easily be monitored by 1H NMR and fluorescence spectroscopies. As expected, although open-shell Fe II ions form similar complex structures, these cations quench the fluorescence emission of all four functionalized Bodipy ligands. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.
      Keywords
      Polymerization
      Self-assembly
      Sonogashira coupling
      Bipyridyl
      Building blocks
      Complex structures
      Coordination polymers
      Dyes/pigments
      Dynamic equilibrium
      Fluorescence emissions
      Functionalized
      Metal ion concentrations
      Metallo-supramolecular
      Molecular building blocks
      Supramolecular polymerizations
      Chromophores
      Emission spectroscopy
      Fluorescence
      Ligands
      Metal complexes
      Metal ions
      Metals
      Monomers
      Polymers
      Rhenium compounds
      Stoichiometry
      Trace analysis
      Zinc
      Functional polymers
      Permalink
      http://hdl.handle.net/11693/22783
      Published Version (Please cite this version)
      http://dx.doi.org/10.1002/chem.200802538
      Collections
      • Department of Chemistry 637
      • Institute of Materials Science and Nanotechnology (UNAM) 1904
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