Structural diversity of terpyridine-based metal complexes with varied dicarboxylate auxiliary ligands
作者:Peng Wang、Li Luo、Taka-aki Okamura、Hong-Ping Zhou、Wei-Yin Sun、Yu-Peng Tian
DOI:10.1016/j.poly.2012.05.047
日期:2012.8
Six new metal complexes, [Zn2L2(1,2-bdc)(2)] (1), [CuZnL2(1,2-bdc)(2)] (2), [Cu2L(1,3-bdc)(2)]center dot 2H(2)O)(n) (3), [Cu2L2(1,4-bdc)](NO3)(2)center dot 2H(2)O}(n) (4), [Cu2L2(1,4-bdc)(SCN)(2)]center dot 2H(2)O (5) and [ZnL(dc)]center dot H2O}(n) (6), have been synthesized by the reactions of 4'-4-(1,2,4-triazol-1-yl)-phenyl-2,2':6',2 ''-terpyridine (L) and different dicarboxylate auxiliary ligands with the corresponding metal salt. Complexes 1 and 2, with 1,2-benzenedicarboxylate (1,2-bdc(2-)), have dinuclear molecular structures. Complex 3, with 1,3-benzenedicarboxylate (1,3-bdc(2-)), is a (3,3,4)-connected three-dimensional (3D) framework with a Point (Schlafli) symbol of (4.6.8)(4.6.8)(6.8(4).10), while 4, with 1,4-benzenedicarboxylate (1,4-bdc(2-)), has an infinite chain structure, and further addition of SCN- anions to 4 results in the formation of the dinuclear complex 5. When 1,4-benzenediacrylic acid (H(2)dc) was employed as auxiliary ligand, complex 6 was obtained, having an infinite zigzag chain structure. All the complexes were characterized by elemental analyses, IR and X-ray crystallography. The results showed that the nature of the auxiliary ligand has a great impact on the structure of the complexes. Furthermore, the photoluminescence of the Zn(II) complexes and the reversible anion exchange property of 4 were investigated. (c) 2012 Elsevier Ltd. All rights reserved.