Abstract
The cyclopalladated [Pd(C6)Cl]2 and [Pd(C6)En]PF6 complexes based on Coumarin 6 are studied by 1H NMR spectroscopy and electronic absorption and emission spectroscopy. It is shown that cyclopalladation leads both to a long-wavelength shift of the spin-allowed intraligand absorption bands of coumarin and to the formation of a characteristic metal-ligand absorption band. It is found that, in comparison with coumarin, the complexes are characterized by a bathochromic shift and by a decrease in the fluorescence quantum yield due to more efficient intersystem crossing to the lower excited triplet state responsible for the low-temperature (77 K) phosphorescence of the complexes.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
K. H. Drexhage, T. W. Hansch, E. P. Ippen, et al., in Dye Lasers, Ed. by F. P. Schafer (Springer, New York, 1974; Mir, Moscow, 1976).
G. E. Dobretsov, Fluorescent Probes in Study of Cells, Membranes, and Lipoproteins (Nauka, Moscow, 1989) [in Russian].
H. G. Brittian, Anal. Chem. 59(8), 1122 (1987).
T. A. Shakhverdov, Kvantovaya Élektron. (Moscow) 41, 57 (1992).
J. Brooks, Y. Rabayan, S. Lamansky, et al., Inorg. Chem. 41(12), 3035 (2002).
S. Lamansky, P. Djurovich, D. Murphy, et al., J. Am. Chem. Soc. 123(18), 4304 (2001).
M. A. Baldo, D. F. O’Brien, Y. You, et al., Nature 395(2), 151 (1998).
M. Ghedini, I. Aiello, A. Crisoini, et al., Coord. Chem. Rev. 250, 1373 (2006).
T. Pugliese, N. Godbert, I. Aiello, and M. Ghedini, Inorg. Chem. Commun. 9, 93 (2006).
M. La Deba, M. Ghedini, I. Aiello, et al., J. Organomet. Chem. 690, 875 (2005).
V. V. Vasil’ev, K. P. Balashev, and G. A. Shagisultanova, Opt. Spektrosk. 54, 876 (1983) [Opt. Spectrosc. 54 (4), 519 (1983)].
Introduction to Photochemistry of Organic Compounds, Ed. by O. G. Bekker and A. V. El’tsov (Khimiya, Leningrad, 1976) [in Russian].
M. V. Kulikova, K. P. Balashev, P.-I. Kvam, and Ĭ. Songstad, Zh. Org. Khim. 70, 177 (2000).
J. Dupont, C. S. Consorti, and J. Spenser, Chem. Rev. 105(6), 2527 (2005).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © O.A. Rodionova, M.V. Puzyk, K.P. Balashev, 2008, published in Optika i Spektroskopiya, 2008, Vol. 105, No. 1, pp. 70–74.
Rights and permissions
About this article
Cite this article
Rodionova, O.A., Puzyk, M.V. & Balashev, K.P. Effect of cyclopalladation on the spectroscopic properties of a Coumarin dye. Opt. Spectrosc. 105, 62–66 (2008). https://doi.org/10.1134/S0030400X08070102
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0030400X08070102