Luminescent Cyclometalated Alkynylplatinum(II) Complexes with a Tridentate Pyridine-Based N-Heterocyclic Carbene Ligand: Synthesis, Characterization, Electrochemistry, Photophysics, and Computational Studies

Authors

  • Sammual Yu-Lut Leung,

    1. Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China), Fax: (+852)2857-1586
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  • Elizabeth Suk-Hang Lam,

    1. Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China), Fax: (+852)2857-1586
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  • Dr. Wai Han Lam,

    1. Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China), Fax: (+852)2857-1586
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  • Dr. Keith Man-Chung Wong,

    Corresponding author
    1. Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China), Fax: (+852)2857-1586
    2. Current address: Department of Chemistry, South University of Science and Technology of China, 1088 Xueyuan Blvd., Shenzhen (P. R. China)
    • Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China), Fax: (+852)2857-1586

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  • Prof. Dr. Wing-Tak Wong,

    1. Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China), Fax: (+852)2857-1586
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  • Prof. Dr. Vivian Wing-Wah Yam

    Corresponding author
    1. Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China), Fax: (+852)2857-1586
    • Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P. R. China), Fax: (+852)2857-1586

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Abstract

A new class of luminescent alkynylplatinum(II) complexes with a tridentate pyridine-based N-heterocyclic carbene (2,6-bis(1-butylimidazol-2-ylidenyl)pyridine) ligand, [PtII(C^N^C)(C[TRIPLE BOND]CR)][PF6], and their chloroplatinum(II) precursor complex, [PtII(C^N^C)Cl][PF6], have been synthesized and characterized. One of the alkynylplatinum(II) complexes has also been structurally characterized by X-ray crystallography. The electrochemistry, electronic absorption and luminescence properties of the complexes have been studied. Nanosecond transient absorption (TA) spectroscopy has also been performed to probe the nature of the excited state. The origin of the absorption and emission properties has been supported by computational studies.

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