Abstract
Picoline ester of dimethylaminooxime of the (+)-3-carene series (L) and mononuclear complexes [ZnLCl2] (I) and [CdLCl2] (II) have been synthesized. In the structure of the complexes, the Zn2+ and Cd2+ ions coordinate three N atoms of the tridentate cyclic ligand L and two Cl atoms. The Cl2N3 coordination polyhedron of complex I is noticeably distorted. In the structure of complex II consisting of two independent molecules, the coordination polyhedron of one independent molecule is a square pyramid and the other is a trigonal bipyramid. The photophysical properties of solid samples of L, I and II have been studied. The ligand L exhibits emission that depends on the luminescence excitation wavelength. The lifetimes of the excited states of L are in the nanosecond range. Complexes I and II exhibit ligand-centered photoluminescence with luminescence quantum yields reaching 11%.
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Funding
This work was supported by the Ministry of Science and Higher Education of the Russian Federation within the framework of state assignments of the Nikolaev Institute of Inorganic Chemistry (nos. 121031700321-3 and 121031700313-8) and the Vorozhtsov Institute of Organic Chemistry of Novosibirsk (no. 122040400035-3).
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Translated by S. Zatonsky
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Kokina, T.E., Agafontsev, A.M., Glinskaya, L.A. et al. Complexes of Zn(II) and Cd(II) with Dimethylaminooxime Picoline Ester, a Terpene Derivative of (+)-3-Carene: Synthesis, Structure, and Photoluminescence Properties. High Energy Chem 57 (Suppl 3), S416–S425 (2023). https://doi.org/10.1134/S0018143923090072
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DOI: https://doi.org/10.1134/S0018143923090072