Počet záznamů: 1
Copper(II) Complexes of Phenolate-Bridged Dimeric Cyclam Ligands: Synthesis, Coordination and Electrochemical Study
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SYSNO ASEP 0599913 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve SCOPUS Název Copper(II) Complexes of Phenolate-Bridged Dimeric Cyclam Ligands: Synthesis, Coordination and Electrochemical Study Tvůrce(i) Šrein, J. (CZ)
Koláčná, Lucie (UFCH-W) ORCID, RID, SAI
Kotek, J. (CZ)
Kubíček, V. (CZ)
Ludvík, Jiří (UFCH-W) RID, ORCIDČíslo článku e202400288 Zdroj.dok. European Journal of Inorganic Chemistry. - : Wiley - ISSN 1434-1948
Roč. 27, č. 31 (2024)Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Copper(II) complexes ; Electrochemistry ; Macrocyclic ligands ; Stability ; UV/VIS spectroscopy Vědní obor RIV CG - Elektrochemie Obor OECD Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) CEP GA21-23261S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UFCH-W - RVO:61388955 EID SCOPUS 85206241354 DOI https://doi.org/10.1002/ejic.202400288 Anotace Bis(macrocyclic) complexes are investigated as artificial analogues of natural dinuclear metalloenzymes. Two ligands containing two cyclam rings connected through a p-cresol or 4-nitrophenol spacer were synthesized and their complexing properties were investigated. CuII complexes were prepared and their properties were studied by a combination of spectral, diffraction and electrochemical methods. The phenolate group is not or only weakly coordinated to the central CuII ion and the two macrocycles behave mostly as two independent complexing units. All the determined solid-state structures showed cyclam adopting trans-III geometry, however, solution study indicated the presence of more isomers in the solution whose abundance changes with pH. Electrochemical reduction of the complexes is irreversible and results in the reductive decomplexation to amalgamated Cu metal. The amalgamated metal is re-oxidized to CuII during the anodic scan of CV and the metal ion is re-coordinated. The ligand containing the nitro group shows an irreversible four-electron reduction of the nitro group. The ligands and the complexes undergo also a slow degradation when incubated in the aqueous solutions for a prolonged time. The degradation relies on the “retro-Mannich” cleavage of the methylene bridge connecting the cyclam ring with the phenol moiety. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2025 Elektronická adresa https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/ejic.202400288
Počet záznamů: 1