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Multifunctional Materials

Figure 1. Schematic coordination of four metal ions around the central TTF core.

In recent years, considerable effort has been devoted to the investigation of multifunctional molecule-based materials.1-3 This interest is driven by the possibility of combining different properties, often incompatible in traditional solid state materials, as well as by the possible synergy between these properties that can lead to either enhancement or modification of the observed effects. In particular, much attention has been paid recently to multifunctional magnetic materials, such as magneto-optical materials, magnetic conductors and superconductors.2

The preparation of multiproperty materials often relies on the union of inorganic and organic components, each of them featuring a specific property targeted in the final composite. Arguably, the most widely studied hybrid materials are those that combine inorganic building blocks with the organic donor tetrathiafulvalene (TTF) or its derivatives.4 Most approaches to the assembly of multifunctional TTF-based materials rely on weak non-covalent interactions (hydrogen bonding or pp stacking) between the TTF units and the inorganic building blocks. Such a strategy typically leads to low or no synergy between the properties of the inorganic and organic components.2  Our research focuses on the preparation of composite materials based on transition metal ions, whose nearest coordination environment is covalently linked to the TTF core. Materials of this type are underexplored and represent significant interest for the discovery of new types of multiproperty hybrids. The direct linkage of the paramagnetic or photoactive metal ions to the redox-active TTF core via coordination and covalent bonds can provide stronger communication between different parts of the structure, which in turn might generate unique combinations of properties.

   
 
  1. Kobayashi, H.; Cui, H.; Kobayashi, A. Chem. Rev. 2004, 104, 5265-5288.

  2. Coronado, E.; Day, P. Chem. Rev. 2004, 104, 5419-5448.

  3. Ouahab, L.; Enoki, T. Eur. J. Inorg. Chem. 2004, 933-941.

  4. Coronado, E.; Galán-Mascarós, J. R. J. Mater. Chem. 2005, 15, 66-74.

 

 
 
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Last updated 12/06/2014