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    Posted January 15, 2014 by
    MorinKal
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    Conjugated Pt(II) Poly-ynes: The new Class of Materials Research

     
    In recent years researchers in several research laboratories around the world have investigated a new class of conjugated rigid-rod platinum(II) poly-ynes having general formula [-(nBu3P)2Pt-CC-R-CC-]n, where R is an aromatic and a hetero-aromatic spacer group. Some of spacer groups are shown in Figure, the poly-yne materials vary in the degree of donor-acceptor interaction between the metal centers and the conjugated ligands, depending on the electronic nature of the spacer group.

    In addition, platinum(II) di-ynes have also been synthesized and investigated. Pt(II) poly-ynes are long chain molecules and form thin films, not suitable for structural studies. Platinum(II) di-ynes are considered as excellent model compounds for the long-chain polymers. Structural characterization of the di-ynes can be readily achieved and extrapolated to the structures of the poly-ynes.

    Alongside the organometallic di-yens and poly-ynes, organic di-ynes and poly-ynes have also been synthesized and characterized. The conjugated organic materials are excellent materials to study the emission from singlet state (fluorescence) but not the triplet state (phosphorescence). Combining the two systems, very valuable information regarding structures and properties can be easily achieved and compared for better structure-property relationship.

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