Hydrothermal Synthesis and Crystal Structure of Two Zinc (II) Complexes with 2,2′-Bipyridine-3,3′-dicarboxylic Acid and Phenanthroline Derivative Ligands

The title complexes, [Zn(bpdc)(pyiP)(2)]center dot 3H(2)O (1) and [Zn(pip)(2)(Hpip)]center dot 3H(2)O (2) (H(2)bpdc=2,2'-bipyridine-3,3'-dicarboxylic acid, pyip=2-(pyridin-3-yl)-1H-imidazo[4,5-f][1,10] phenanthroline, Hpip=2-pheny1-1H-imidazo[4,5-f][1,10]phenanthroline) have been synthesized under hydrothermal conditions and characterized by IR spectrum and X-ray single-crystal diffraction. Complex 1 is of monoclinic, space group P2(1)/c with a=1.656 9(5) nm, b=1.361 4(4) nm, c=1.8637(6) nm, beta=93.128(6)degrees, V=4.198(2) nm(3), Z=4, ZnC48H34N12O7, M-r=955.99, D-c=1.513 g.cm(-3),mu(Mo K alpha)=0.657 mm(-1), F(000)=1 968, GOOF=1.008, the final R=0.0577 and wR=0.107 5 for 4 622 observed reflections (1>2 sigma(I)). Complex 2 is of monoclinic, space group P2(1)/c with a=1.7977(4) nm, b=1.527 0(3) nm, c=1.767 6(4) nm, beta=102.84(3)degrees, V=4.730 9(19) nm(3), Z=4, ZnC57H40N12O3, M-r=1 006.36, D-c=1.410 g.cm(-3), mu(Mo K alpha)=0.581 mm(-1), F(000)=2 072, GOOF=1.134, the final R=0.089 5 and wR=0.208 4 for 6 558 observed reflectiwons (1>2 sigma(I)). Structural analyses show that the complexes 1 and 2 all present a zero-dimensional unit. Furthermore, the hydrogen-bonding and pi-pi stacking interactions play key roles in consolidating the structures of complexes. Thermal stability and luminescent properties were also investigated. CCDC: 853171, 1; 853172, 2.