LOCAL ATOMIC STRUCTURE OF MONO- AND BINUCLEAR METAL COMPLEXES BASED ON 3-FORMYLPYRONE AND 3-FORMYLCOUMARINE BIS-AZOMETHINES
V.G. Vlasenko1, L.D. Popov2, I.N. Shcherbakov2, V.V. Lukov2, S.I. Levchenkov2,3, I.V. Pankov2, Ya.V. Zubavichus4, A.L. Trigub4
1Scientific Research Institute of Physics, Rostov-on-Don, Russia
2Southern Federal University, Rostov-on-Don, Russia
3Southern Scientific Center, Russian Academy of Sciences, Rostov-on-Don, Russia
4National Research Center, Kurchatov Institute, Moscow, Russia
Keywords: азометины, металлокомплексы, рентгеновская спектроскопия поглощения, вейвлет-анализ, azomethynes, metal complexes, X-ray absorption spectroscopy, wavelet analysis
Abstract
A series of Cu, Ni, and Mn complexes based on formylpyrone and formylcoumarine azomethynes with 1,3-diaminepropanol-2. The analysis of XANES and EXAFS spectra of the Cu, Ni, and Mn complexes, which were processed by both Fourier and wavelet transforms, enables the determination of local atomic structural parameters and the unambiguous evidence of the formation of both dimeric and monomeric structures for these coordination compounds. The possibility of forming binuclear compounds is shown to depend mainly on the nature of the bridging ligand and be independent of the type of the polydentate azomethyne ligand: pyrone or coumarine. The obtained structural results are well consistent with the magnetochemical data for the complexes.
|
