EPR studies of spin-spin interactions between Cu(II) centers in dimeric, hexameric and homo- and heteronuclear tetrameric complexes

摘要

Applications of conventional (X-band), High-Field and High-Frequency EPR to study the nature of exchange interactions between Cu(II) centres in different homo- and hetronuclear systems are reviewed. The fine structure EPR spectra have been observed and analyzed in terms of spin-Hamiltonian parameters corresponding to S ≥ 1 for different [Cu2(β-alanine)4Cl2]Cl2·H2O dimeric complexes present in one unit cell, Cu(II) dimers possessing different conformations, dimeric species formed between Cu(II) ions and polyfunctional ligand in solution, Cu-Zn-Cu-Zn and Cu-Co-Cu-Co tetrameric heterometallomacrocycles, Cu4O4 cubane-like tetramers and for the chain Cu(II) hexamer.