Synthesis, structure and luminescence studies of Eu(III), Tb(III), Sm(III), Dy(III) cationic complexes with acetylacetone and bis(5-(pyridine-2-yl)-1,2,4-triazol-3-yl)propane

New cationic heteroleptic Ln(III) complexes with acetylacetonate and bis(5-(pyridine-2-yl)-1,2,4-triazol-3-yl)propane basis are synthesized. The complexes are characterized by various means, including single crystal X-ray diffraction analysis. Electronic absorption and emission spectra of the compounds both in solid and solutions are studied.