Self-organization of chiral self-complementary europium complex with a new achiral tripod-type ligand: Synthesis and stereochemistry effects to complex luminescence properties

Abstract

Solid complexes of europium picrate with the ligands: 2-(bis-dibutylcarbamoylmethyl-amino)- N, N-dibutyl-acetamid (L 1), 2-{bis-[(ethyl-phenyl-carbamoyl)-methyl]-amino}- N-ethyl- N-phenyl-acetamide (L 2) and 2-(bis-diethylcarbamoyl methyl-amino)- N, N-diethyl-acetamide (L 3) were prepared and characterized by elemental analysis, conductivity measurements and IR spectra. For the [Eu(pic) 3L 1], X-ray measurements show that the screw coordination arrangement of the achiral tripod-type ligand (L 1) around the Eu(III) ion induces the chirality of clockwise ( C) and anticlockwise ( A) molecular structures. And, the luminescence properties of tripod-type ligands with Eu(III) ion were affected by the complex stereochemistry.