Self-Assembled Zn(II) Coordination Complexes Based on Mixed V-Shaped Asymmetric Multicarboxylate and N-Donor Ligands
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- 作者：Wei Yang ; Chiming Wang ; Qi Ma ; Xuenan Feng ; Hailong Wang ; Jianzhuang Jiang
- 刊名：Crystal Growth & Design
- 出版年：2013
- 出版时间：November 6, 2013
- 年：2013
- 卷：13
- 期：11
- 页码：4695-4704
- 全文大小：674K
- 年卷期：v.13,no.11(November 6, 2013)
- ISSN：1528-7505
文摘
Hydrothermal reaction between Zn(OAc)2路2H2O and three asymmetric semirigid V-shaped multicarboxylate ligands H3L1鈥? with the help of a 4,4'-bipyridine (4,4'-bpy) or 1,4-bis(imidazol-1-ylmethyl)benzene (bix) linker led to the isolation of six new coordination polymers, including [Zn3(L1)2(4,4鈥?bpy)2]n路(H2O)2n (1), [Zn3(L2)2(4,4鈥?bpy)(H2O)2]n路(H2O)2n (2), [Zn3(L3)2(4,4鈥?bpy)2(H2O)4]n路(H2O)6n (3), [Zn3(L1)2(bix)3]n路(H2O)7n (4), [Zn3(L2)2(bix)3]n路(H2O)4n (5), and [Zn3(HL3)2(bix)2]n (6), where H3L1, H3L2, H3L3 ligands represent 3-(2-carboxyphenoxy)phthalic acid, 4-(2-carboxyphenoxy)phthalic acid, 3-(4-carboxyphenoxy)phthalic acid, respectively. Single crystal X-ray diffraction analysis reveals a three-dimensional (3D) network for 1 and 3鈥?b>5 but a two-dimensional (2D) structure for 2 and 6. Despite the construction from the polymetallic chains connected by the 4,4鈥?bpy ligands for both compounds 1 and 2, a 3D architecture was revealed for the former species while a 2D configuration for the latter one. Complex 3 contains open nanotube building units composed of sole 44-numbered metallomacrocycles. For 4, the 20-numbered metallomacrocycle subunits linked by Zn ions give a 1D chain, which further form a 3D polymeric structure with the help of the other cyclic-shaped subunits made from the bix ligands and Zn ions. A 3D framework of 5 is generated from the 2D sheets simplified as a (6,3) net bound by the bix ligands. Compound 6 shows a 2D corrugated framework simplified as a (4,4) net assembled by the bix ligand and dinuclear zinc unit as node. These results seem to suggest that the diversity in the building subunits formed in 1鈥?b>6 actually originates from the intrinsic nature of the three asymmetric V-shaped tricarboxylate ligands together with the tunable coordination geometry and molecular configurations of ligands by the N-donor ligand employed. In addition, the thermal stability and luminescence properties for the series of six complexes have also been investigated.