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., 2023, Volume 33, Issue 3,Pages <nobr>380

This article is cited in 2 papers

Communications

Photoinduced recoordination in the complexes of bis-aza-18-crown-6-containing dibenzylidenecyclobutanone with alkali and alkaline-earth metal cations

V. V. Volchkov^a, M. N. Khimich^a, M. Ya. Melnikov^a, A. E. Egorov^b, R. O. Starostin^ac, M. V. Fomina^c, S. P. Gromov^ac

^a Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russian Federation
^b N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, Moscow, Russian Federation
^c Photochemistry Center, FSRC ‘Crystallography and Photonics’, Russian Academy of Sciences, Moscow, Russian Federation

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.

Keywords: bis-aza-18-crown-6-containing dienone, recoordination, alkali, alkaline-earth metal cation, supramolecular complex, TD DFT calculations.

Language: English

DOI: 10.1016/j.mencom.2023.04.026

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