Synthesis and crystal structures of La(III), Y(III) complexes of homoveratric acid with 1,10-phenanthroline

Two three-dimensional complexes [Ln(DMPA)3phen]2 (HDMPA=3,4-dimet hoxyphenylacetic acid, homoveratric acid; Ln=La, Y; phen=1,10-phenanthroline) were synthesized under hydrothermal conditions and characterized with IR and emission spectra. The crystal structures were determined with single crystal X-ray diffraction method. The two compounds were isostructural, and 3D supramolecule architectures were formed by hydrogen bonds and π–π stacking interactions. They strongly emitted upon excitation due to π*→π transition of the ligands.