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Bis‐ and Tris(tetraazamacrocyclic) Copper Complexes with Disulfide Linkers
Author(s) -
Galińska Monika,
KorybutDaszkiewicz Bohdan,
Wawrzyniak Urszula E.,
Bilewicz Renata,
Śledź Pawel,
Kamiński Radosław,
Dominiak Paulina,
Woźniak Krzysztof
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200701231
Subject(s) - chemistry , copper , molecule , cystamine , monolayer , electrochemistry , crystallography , redox , macrocyclic ligand , triethylamine , crystal structure , self assembly , polymer chemistry , stereochemistry , inorganic chemistry , electrode , organic chemistry , biochemistry
Di‐ and trinuclear title complexes, 2 Cu and 3 Cu, containing, respectively, two and three macrocyclic fragments bound by aliphatic linkers with the ‐S–S‐ moieties have been synthesized by using cystamine dihydrochloride in the presence of triethylamine. The structure of the 2 Cu complex in the solid state was confirmed by X‐ray analysis. Two macrocyclic rings of 2 Cu form a rectangular cavity of size 17.18 Å [S19 ··· S19 (1 – x , – y , – z )] × 3.62 Å. The shorter dimension of the cavity is the shortest observed in bis(macrocycle)s studied by us. The bis(macrocyclic) molecules in the crystal lattice are surrounded by PF 6 – ions and water molecules. Redox properties of the new compounds were determined by applying various voltammetric techniques. The macrocyclic architectures remained stable in nonaqueous solutions. For the bis‐ and tris(macrocyclic) compounds, the exchange of one electron takes place almost independently at each of the copper centers. The complexes were self‐ assembled at the gold surface to produce stable monolayer‐modified electrodes. The immobilization of these highly charged cations on the electrode required the application of appropriate negative potentials during the self‐assembly process.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)