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Abstract: Two zinc(II) complexes with NO- and N2O-set oxime-containing Schiff base ligand of 2-hydroxyimino-N′-[1-(2-pyridyl)ethylidene]propanohydrazone (Hpop), namely [Zn3(pop)2-(CH3OH)2Cl4] (1) and [Zn(pop)Cl]4·(H2O)2 (2), have been successfully synthesized from the reaction of Hpop with ZnCl2 in CH3OH under different temperatures and fully characterized by X-ray single-crystal diffraction, EA and IR as well as TG. At the low temperature, the linear M3L2-type trinuclear Zn(II) compound 1 was obtained, however, the grid-like Zn4L4-type tetranuclear Zn(II) compound 2 was given at the high temperature from the same reactants. Interestingly, compound 1 may be irreversibly transformed into 2 via ring-closed coordination reaction under the high temperature, accompanied by the corresponding changes in fluorescent property. [Copyright &y& Elsevier]

Abstract: Two new complexes based on 4-(benzimidazol-1-ylmethyl)benzoic acid (HL), (Sm2L6·H2O)n (1) and (LuL3)n (2), have been synthesized under the solvothermal condition and characterized by single-crystal X-ray diffraction, X-ray powder diffraction (PXRD), thermogravimetric analysis (TGA) and elemental analysis (EA) and IR spectra. The results show that both complexes are isomorphous and possess 2-D pillar-chained frameworks, consisting of 1-D triple-stranded double-helical (PPM/MMP) [Ln(η 2-O)(μ 2-OCO)2]n (Ln=Sm(1), Lu(2)) motif as chain and μ 3-(η 1:η 1:η 1)-bridging ligand L− as pillar, though they have different space groups of triclinic P-1 for 1 and monoclinic P21/c for 2. Two complexes represent the first example of 2-D lanthanide compound containing 4-(benzimidazol-1-ylmethyl)benzoic acid as the sole ligand. Additionally, the photoluminescent property of 1 is also discussed. [Copyright &y& Elsevier]