Spectroscopic properties of polycrystals of supramolecular europium complexes with bathophenanthroline

Abstract

Nanostructured supramolecular complex of europium(III) with bathophenanthroline (bphen), with detonation synthesis nanodiamonds (NDs) used as a structure-forming element, has been synthesized for the first time. The characteristics of the Eu(bphen)₂(NO₃)₃ complex and the supramolecular complex with NDs, ND–Eu(bphen)₂(NO₃)₂, are studied and compared using scanning electron microscopy (SEM), luminescence spectroscopy, IR spectroscopy, and electron-spin resonance (ESR) spectroscopy. The luminescence quantum yields of the complexes are estimated by the relative method using a β-diketonate complex of europium (III) with tris(thenoyltrifluoroacetone) and 1,10-phenanthroline (Eu(TTA)₃phen) as a reference. It is found that the ND–Eu(bphen)₂(NO₃)₂ supramolecular complex has a higher photoresistance than the complex without NDs and no worse thermal stability (up to a temperature of +150°C).