In our previous work we studied mono-nuclear Cu(II) and Ni(II) cyclidene complexes functionalised with one or two aza-crown ethers [1].

The aim of present studies was the synthesis and physicochemical characterisation of dinuclear complexes containing two cyclidene metal ion coordinating units, linked by two diaza-18-crown-6 ethers. Two the of studied complexes were homodinuclear and one of them was heterodinuclear containing copper(II) and nickel(II) cyclidens in the same molecule. Structure of studied complexes is presented in Scheme 1.

Scheme 1

In our studies, we focused on investigation of electrochemical properties of bismacrocyclic compounds. Especially, interaction between metal centers and behaviour in the presence of small molecules, which could be accommodated in the cavity, was interesting for us. The influence of the presence of anionic guests of different shape and size on electrochemical properties of studied complexes will be presented.

[1] B. Korybut-Daszkiewicz, J. Taraszewska, K. Zięba, A. Makal, K. Woźniak, Eur. J. Inorg. Chem., (2004) 3335.

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1. Tetraazamacrocyclic copper(II) and nickel(II) complexes in host - guest systems.
2. Redox processes of dithiolated tetraazamacrocyclic complexes of Ni(II) and Cu(II) in solution and immobilized on gold electrodes
3. Molecular Motions in New Catenanes
4. Fine-tuning of properties of bismacrocyclic dinuclear cyclidene receptors by N-methylation.