Crystal structures and photoluminescence properties of erbium(III) complexes

This book presents current research in the study of syntheses, crystal structure analyses, and photoluminescence properties of erbium mononuclear or dinuclear complexes. We have synthesized the erbium complexes from the reactions of erbium salt with two different chelating ligands, namely anthracene-9-carboxylic acid and pentaethylene glycol in the presence or in the absencence of picric acid. The photoluminescence properties of the complexes based on the crystal structure analyses and the electronic structures are discussed. The erbium complexes were found to crystallize into monoclinic P21/c space group, centered with metal ion being coordinated in eight or nine coordination number as usually observed in many erbium(III) complexes.