Syntheses, crystal structures, and magnetic and fluorescence properties of three metal complexes coordinated by mixed flexible (2-pyridylmethyl,3-pyridylmethyl)amine and rigid 5-sulfoisophthalate ligands

Abstract

Three new complexes, {[Cu3(2,3-pyma)2(sip)2(H2O)5]·5H2O} n , {[Zn(H-2,3-pyma)(sip)(H2O)]·H2O} n , and {[Cd(H-2,3-pyma)(sip)(H2O)]·H2O} n (2,3-pyma = (2-pyridylmethyl,3-pyridylmethyl)amine and H3sip = 5-sulfoisophthalic acid) were synthesized and structurally characterized by single-crystal X-ray diffraction. The Cu(II) complex crystallizes in neutral two-dimensional layers in which the Cu(II) centers are bridged by both the flexible 2,3-pyma and the rigid sip ligands. The Zn(II) and Cd(II) complexes contain neutral one-dimensional chains linked by the rigid sip anions, whereas the flexible H-2,3-pyma ions only act as terminal ligands. The Cu(II) complex shows weak antiferromagnetic interactions, while the Zn(II) and Cd(II) complexes exhibit fluorescent emissions in the solid state.