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Synthesis, photophysical, and electrochemical properties of two polynuclear ruthenium(II) polypyridyl complexes containing diazafluorene

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Abstract

Two polypodands, tetrakis[2-(4,5-diazafluoren-9-ylimino)phenoxymethyl]methane (L1) and 1,1,1-tris[2-(4,5-diazafluoren-9-ylimino)phenoxymethyl]propane (L2), and their corresponding Ru(II) polypyridyl complexes have been synthesized and characterized. The photophysical behaviors of the two complexes were investigated by UV–vis absorption and emission spectroscopy. They display metal-to-ligand charge transfer (MLCT) absorptions at around 443 nm in MeCN solution at room temperature and emission at around 573 nm in EtOH:MeOH (4:1) glassy matrix at 77 K. Electrochemical studies of the two complexes show one Ru(II)-centered oxidation at around 1.35 V and three ligand-centered reductions.

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Acknowledgments

We are grateful to the Yunnan provincial science and technology department (2010ZC148, 2006B0081M, 2009ZD008) for financial support.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Qujing Normal University, Qujing, 655011, People’s Republic of China

    Feixiang Cheng, Jishu Chen & Fan Wang

  2. College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, People’s Republic of China

    Ning Tang & Longhai Chen

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  1. Feixiang Cheng
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  2. Jishu Chen
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  3. Fan Wang
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  4. Ning Tang
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  5. Longhai Chen
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Correspondence to Feixiang Cheng.

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Cheng, F., Chen, J., Wang, F. et al. Synthesis, photophysical, and electrochemical properties of two polynuclear ruthenium(II) polypyridyl complexes containing diazafluorene. Transition Met Chem 36, 573–578 (2011). https://doi.org/10.1007/s11243-011-9504-0

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