title: ESR and optical absorption studies on the copper (II) interaction with aromatic amino acids.
abstract: Electron spin resonance and optical absorption studies have been done in order to investigate the interaction between Cu2+ and aromatic amino acids in aqueous solution at 77 K and at room temperature as well. Depending on the concentration each aromatic amino acid can form two different kinds of complexes with Cu2+ which can be characterized by its ESR pattern. Additional information was obtained from optical d-d and CT transitions.
mesh_terms: D000596:Amino Acids; D003300:Copper; D004578:Electron Spin Resonance Spectroscopy; D006639:Histidine; D008024:Ligands; D010649:Phenylalanine; D012996:Solutions; D013057:Spectrum Analysis; D013696:Temperature; D014364:Tryptophan; D014443:Tyrosine; D014867:Water
chemical_list: D000596:Amino Acids; D008024:Ligands; D012996:Solutions; D014867:Water; D014443:Tyrosine; D010649:Phenylalanine; D006639:Histidine; D003300:Copper; D014364:Tryptophan