Abstract
Thionine (ThH+) molecules form monomeric ThH+@CB7 (1: 1) and dimeric 2ThH+@CB8 (2: 1) complexes with cucurbit[7,8]urils (CB7) and (CB8) in water. Unlike the case free ThH+ molecules, the absorption spectrum of the complexes is characterized by a hypsochromic shift of the maximum by 6 and 41 nm for ThH+@CB7 and 2ThH+@CB8, respectively. The ThH+@CB7 complexes exhibit fluorescence, unlike the nonfluorescing 2ThH+@CB8 complexes. The monomeric complexes undergo intersystem crossing to the triplet state with a lifetime of 14 μs. The dimeric complexes have a very low quantum yield of the triplet state. The triplet state of the dimeric complexes was populated by photosensitized excitation by triplet–triplet energy transfer. The lifetime of the triplet state is ≈50 μs.
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References
Terenin, A.N., (Photonics of Dyes and Related Organic Compounds), Leningrad: Nauka, 1967.
Wildes, P.D., Lichtin, N.N., Hoffman, M.Z., Andrews, L., and Linschitz, H., Photochem. Photobiol., 1977, vol. 25, no. 1, p.21.
Vogelmann, E. and Kramer, H.E.A., Photochem. Photobiol., 1976, vol. 23, no. 6, p.383.
Korobov, V.E. and Chibisov, A.K., Usp. Khim., 1983, vol. 52, no. 1, p.43.
Nau, W.M. and Scherman, O.A., Isr. J. Chem., 2011, vol. 51, nos. 5/6, p.492.
Dsouza, R.N., Pischel, U., and Nau, W.M., Chem. Rev., 2011, vol. 111, no. 12, p. 7941.
Zakharova, G.V., Avakyan, V.G., Chibisov, A.K., and Alfimov, M.V., High Energy Chem., 2017, vol. 51, no. 3, p.195.
Zakharova, G.V., Zhizhimov, D.A., Avakyan, V.G., et al., High Energy Chem., 2014, vol. 48, no. 2, p.76.
Bhasikuttan, A.C., Choudhury, S.D., Pal, H., and Mohanty, J., Isr. J. Chem., 2011, vol. 51, nos. 5-6, p.634.
Montes-Navajas, P., Corma, A., and Garcia, H., Chem. Phys. Chem., 2008, vol. 9, p.713.
Montes-Navajas, P. and Garcia, H., Photochem. Photobiol., 2009, vol. 204, p.97.
Xi, Y.Y., Tang, Q., Huang, Y., Tao, Z., Xue, S.F., and Zhu, Q.J., Spectrosc. Spectral Anal., 2016, vol. 36, no. 6, p. 1809.
Zakharova, G.V., Avakyan, V.G., Markelov, V.P, et al., High Energy Chem., 2015, vol. 49, no. 6, p.407.
Maia, J.D.C., Urquiza, C., Gabriel, A., et al., J. Chem. Theory Comput., 2012, vol. 8, no. 9, p. 3072.
Stewart, J.J.P., MOPAC2012, Version 15.036W, Colorado Springs, Stewart Computational Chemistry, 2012. http: OpenMOPAC.net(2012).
Kramer, H.E.A., Photosensibilisierte Sauerstoffubertragung nach einem Redoxmechanismus: Das System Thionin, 18Allylthioharnstoff und Sauerstoff, Doctor Dissertation, Stuttgart, 1970.
Lee, J.W., Samal, S., Selvapalam, N., et al., Acc. Chem. Res., 2003, vol. 36, no. 8, p.621.
Zakharova, G.V., Gutrov, V.N., Plotnikov, V.G., et al., High Energy Chem., 2017, vol. 51, no. 5, p.345.
Zakharova, G.V., Gutrov, V.N., Alfimov, M.V., and Chibisov, A.K., High Energy Chem., 2017, vol. 51, no. 5, p. 404.
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Original Russian Text © L.S. Atabekyan, V.G. Avakyan, G.V. Zakharova, A.K. Chibisov, 2018, published in Khimiya Vysokikh Energii, 2018, Vol. 52, No. 2, pp. 103–108.
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Atabekyan, L.S., Avakyan, V.G., Zakharova, G.V. et al. Primary Photoprocesses in Thionine in Supramolecular Complexes with Cucurbit[7,8]urils in Water. High Energy Chem 52, 117–122 (2018). https://doi.org/10.1134/S0018143918020030
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DOI: https://doi.org/10.1134/S0018143918020030