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JOURNALS // Mendeleev Communications // Archive
Mendeleev Commun., 2023 Volume 33, Issue 6, Pages 769–773 (Mi mendc519)
This article is cited in 1 paper

Communications

Femtosecond absorption spectroscopy of bis-aza-18-crown-6-containing dibenzylidenecyclobutanone complexes with alkali and alkaline-earth metal cations

V. V. Volchkova, M. N. Khimicha, M. Ya. Melnikova, F. E. Gostevb, I. V. Shelaevb, V. A. Nadtochenkob, R. O. Starostinac, M. V. Fominac, A. Ya. Freidzonde, S. P. Gromovac

a Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russian Federation
b N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow, Russian Federation
c Photochemistry Center, FSRC ‘Crystallography and Photonics’, Russian Academy of Sciences, Moscow, Russian Federation
d Weizmann Institute of Science, Rehovot, Israel
e National Research Nuclear University MEPhI, Moscow, Russian Federation

Abstract: Transient absorption spectroscopy, kinetics of absorption anisotropy decay for bis-aza-18-crown-6-containing di-benzylidenecyclobutanone dye and its metal complexes, and quantum chemical calculations support the presence of the first stage in the photorecoordination mechanism for the complexes with the Ba2+, Ca2+, and K+ cations. The depolarization parameters, including the radii of solvates, are deduced from the experimental data. During the barrierless photorecoordination of the complex with two Ba2+ cations, the solvent shell of the crowned Ba2+ cation undergoes the following changes: (2 + 1)MeCN, (3 + 1)MeCN, 4 MeCN.

Keywords: aza-18-crown-6, dienones, cyclobutanone, recoordination, alkali, alkaline-earth metal cation, supramolecular complex, TD DFT calculations, time-resolved differential absorption spectroscopy.

Language: English

DOI: 10.1016/j.mencom.2023.10.010


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