Abstract:
Complexation with strong competitors (i.e., Ba2+, Ca2+, and K+) shortens the length of the chromophore in bis-aza-18-crown-6-containing dienones of 2,4-dibenzylenecyclo-butanone series due to the weakening of π–LP conjugation as well as disruption of the quinonoid structure in the ground state of the dye (LP is the lone electron pair of the crown nitrogen atom). In the excited state, recoordination of metal cations in the crown cavity takes place. The complexation as well as the newly discovered photorecoordination in these metal complexes may be used to control the chromophore properties of the samples.
Citation:
V. V. Volchkov, M. N. Khimich, M. Ya. Melnikov, A. E. Egorov, R. O. Starostin, M. V. Fomina, S. P. Gromov, “Photoinduced recoordination in the complexes of bis-aza-18-crown-6-containing dibenzylidenecyclobutanone with alkali and alkaline-earth metal cations”, Mendeleev Commun., 33:3 (2023), 380–383
Linking options:
https://www.mathnet.ru/eng/mendc403
https://www.mathnet.ru/eng/mendc/v33/i3/p380
This publication is cited in the following 2 articles:
V. V. Volchkov, M. N. Khimich, M. Ya. Melnikov, O. A. Alatortsev, F. E. Gostev, I. V. Shelaev, V. A. Nadtochenko, R. O. Starostin, M. V. Fomina, A. E. Egorov, A. Ya. Freidzon, S. P. Gromov, “Complexation of bis(aza-18-crown-6)-containing dibenzylidenecyclopentanone with alkali and alkaline-earth metal cations: specific features and photoinduced recoordination in the complexes”, Russ Chem Bull, 73:6 (2024), 1578
V. V. Volchkov, M. N. Khimich, M. Ya. Melnikov, F. E. Gostev, I. V. Shelaev, V. A. Nadtochenko, R. O. Starostin, M. V. Fomina, A. Ya. Freidzon, S. P. Gromov, “Femtosecond absorption spectroscopy of bis-aza-18-crown-6-containing dibenzylidenecyclobutanone complexes with alkali and alkaline-earth metal cations”, Mendeleev Commun., 33:6 (2023), 769–773
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