Effect of N-Donor Ancillary Ligands on Supramolecular Architectures of a Series of Zinc(II) and Cadmium(II) Complexes with Flexible Tricarboxylate
详细信息 查看全文
- 作者：Guang-Xiang Liu ; Yong-Qing Huang ; Qian Chu ; Taka-aki Okamura ; Wei-Yin Sun ; Hong Liang ; Norikazu Ueyama
- 刊名：Crystal Growth & Design
- 出版年：2008
- 出版时间：September 3, 2008
- 年：2008
- 卷：8
- 期：9
- 页码：3233-3245
- 全文大小：792K
- 年卷期：v.8,no.9(September 3, 2008)
- ISSN：1528-7505
文摘
This work presents a systematic investigation on reactions of a flexible tricarboxylic acid with Zn(II), Cd(II) in the presence of varied N-donor ancillary ligands. Seven new metal−organic frameworks [Zn3(bta)2(bpy)2] (1), [Zn3(bta)2(dpe)2]·2H2O (2), [Zn2(OH)(bta)(bpe)]·2H2O (3), [Zn2(OH)(bta)(bpp)] (4), [Cd2(bta)(bpy)2(H2O)]ClO4·H2O (5), [Cd3(bta)2(bpy)2]·2H2O (6), and [Cd3(bta)2(H2O)2] (7) [bta3− = benzene-1,3,5-triacetate, bpy = 4,4′-bipyridine, dpe = 1,2-di(4-pyridyl)ethylene, bpe = 1,2-bis(4-pyridyl)ethane, and bpp = 1,3-bis(4-pyridyl)propane] have been obtained and characterized by single-crystal X-ray diffraction, IR, thermogravimetric and elemental analyses. Complexes 1−3, 5, and 6 are three-dimensional (3D) architectures containing infinite two-dimensional (2D) networks pillared by N-donor ligands, whereas 4shows 2D network structure. Complex 3 has 2-fold interpenetration of 3D frameworks with 4.82 networks linked by bpe ligands, and 5 features an unusual 3D cationic supramolecular architecture. Complex 7 contains the Kagomé lattice inorganic layers, which are further linked by bta3− ligands to form a 3D supramolecular architecture. The results showed that the structure and flexibility of the N-donor ancillary ligands have great influence on the structure of the complexes. The photoluminescence properties of 1−7 in the solid-state at room temperature have been studied.