Synthesis and spectroscopic studies on azo-dye derivatives of polymetallic lanthanide complexes: using diazotization to link metal complexes together.

Heteronuclear tetrametallic lanthanide complexes have been synthesized from stable complexes by diazotization and azo-compound formation. Luminescence spectroscopy has been used to show that the complexes used as building blocks are stable under the reaction conditions.