Metal-to-Ligand Charge Transfer Excited States in π-Conjugated Systems


This paper overviews recent work that examined the optical properties of mono-disperse, PPE-based π-conjugated oligomers that contain a 2,2-bipyridine-5,5’-diyl metal coordinating unit. The photophysical properties of the free oligomers and metallated oligomers that contain the -Ru(bpy)22+ and -Re(CO)3Cl transition metal complexes coordinated to the bpy-diyl unit have been characterized by absorption, photoluminescence and transient absorption spectroscopy. In addition, we report the photophysics of a novel organometallic “square” that features “sides” consisting of a PPE-type π-conjugated oligomer and “corners” that consist of (dbubpy)PtII(acetylide)2 units (where dbubpy = 4,4’-di-tert-butyl-2,2’-bipyridine).

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  1. 1.

    Handbook of Conducting Polymers edited by T. A. Skotheim, R. L. Elsenbaumer, and J. R. Reynolds (Marcel Dekker, New York, 1998).

  2. 2.

    L. J. Rothberg, M. Yan, F. Papadimitrakopoulos, M. E. Galvin, E. W. Kwock, and T. M. Miller, Synth. Met. 80, 41 (1996).

    CAS  Article  Google Scholar 

  3. 3.

    R. D. Scurlock, B. Wang, P. R. Ogilby, J. R. Sheats, and R. L. Clough, J. Am. Chem. Soc. 117, 10194 (1995).

    CAS  Article  Google Scholar 

  4. 4.

    T. M. Swager, C. J. Gil, and M. S. Wrighton, J. Phys. Chem. 99, 4886 (1995).

    CAS  Article  Google Scholar 

  5. 5.

    K. A. Walters, K. D. Ley, and K. S. Schanze, J. Chem. Soc. Chem. Commun. 10, 1115 (1998).

    Article  Google Scholar 

  6. 6.

    M. D. McGehee, E. K. Miller, D. Moses, and A. J. Heeger. in Advances in Synthetic Metals. Twenty Years of Progress in Science and Technology edited by P. Bernier, S. Lefrant, G. Bidan (Elsevier, Amsterdam, 1999) p. 98.

  7. 7.

    A. Juris, V. Balzani, F. Barigelletti, S. Campagna, P. Belser, and A. von Zelewsky, Coord. Chem. Rev. 84, 85 (1988).

    CAS  Article  Google Scholar 

  8. 8.

    M. Wrighton, and D. L. Morse, J. Am. Chem. Soc. 96, 998 (1974).

    CAS  Article  Google Scholar 

  9. 9.

    K. S. Schanze, G. A. Neyhart, and T. J. Meyer, J. Phys. Chem. 90, 2182 (1986).

    CAS  Article  Google Scholar 

  10. 10.

    R. J. Watts, J. Chem. Ed. 60, 834 (1983).

    CAS  Article  Google Scholar 

  11. 11.

    P. Y. Chen, and T. J. Meyer, Chem. Rev. 98, 1439 (1998).

    CAS  Article  Google Scholar 

  12. 12.

    K. D. Ley, and K. S. Schanze, Coord. Chem. Rev. 171, 287 (1998).

    CAS  Article  Google Scholar 

  13. 13.

    K. D. Ley, Y. T. Li, J. V. Johnson, D. H. Powell, and K. S. Schanze, J. Chem. Soc. Chem. Commun. 1749 (1999).

  14. 14.

    U. Ziener, and A. Godt, J. Org. Chem. 62, 6137 (1997).

    CAS  Article  Google Scholar 

  15. 15.

    H. Kukula, S. Veit, and A. Godt, Eur. J. Org. Chem. 277 (1999).

  16. 16.

    B. Wang, and M. R. Wasielewski, J. Am. Chem. Soc. 119, 12 (1997).

    CAS  Article  Google Scholar 

  17. 17.

    L. A. Worl, R. Duesing, P. Chen, L. Della Ciana, and T. J. Meyer, J. Chem. Soc. Dalton Trans. 3423 (1991).

  18. 18.

    T. A. Perkins, W. Humer, T. L. Netzel, and K. S. Schanze, J. Phys. Chem. 94, 2229 (1990).

    CAS  Article  Google Scholar 

  19. 19.

    R. S. Becker, J. S. de Melo, A. Maçanita, and F. Elisei, J. Phys. Chem. 100, 18683 (1996).

    CAS  Article  Google Scholar 

  20. 20.

    L. A. Lucia, R. D. Burton, and K. S. Schanze, Inorg. Chim. Acta 208, 103 (1993).

    CAS  Article  Google Scholar 

  21. 21.

    A. I. Baba, J. R. Shaw, J. A. Simon, R. P. Thummel, and R. H. Schmehl, Coord. Chem. Rev. 171, 43 (1998).

    CAS  Article  Google Scholar 

  22. 22.

    J. A. Simon, S. L. Curry, R. H. Schmehl, T. R. Schatz, P. Piotrowiak, X. Jin, and R. P. Thummel, J. Am. Chem. Soc. 119, 11012 (1997).

    CAS  Article  Google Scholar 

  23. 23.

    S. Leininger, B. Olenyuk, and P. J. Stang, Chem. Rev. 100, 853 (2000).

    CAS  Article  Google Scholar 

  24. 24.

    W. B. Connick, D. Geiger, and R. Eisenberg, Inorg. Chem. 38, 3264 (1999).

    CAS  Article  Google Scholar 

  25. 25.

    M. Hissler, W. B. Connick, D. K. Geiger, J. E. McGarrah, D. Lipa, R. J. Lachiocotte, and R. Eisenberg, Inorg. Chem. 39, 447 (2000).

    CAS  Article  Google Scholar 

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Correspondence to Yiting Li.

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Li, Y., Whittle, C.E., Walters, K.A. et al. Metal-to-Ligand Charge Transfer Excited States in π-Conjugated Systems. MRS Online Proceedings Library 665, 37 (2000).

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