Anion-Dependent Crystallization of Four Supramolecular Cadmium Complexes: Structures and Property Studies
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- 作者：Qian Shi ; Yunti Sun ; Lizi Sheng ; Kefang Ma ; Maolin Hu ; Xingen Hu ; Shaoming Huang
- 刊名：Crystal Growth & Design
- 出版年：2008
- 出版时间：September 3, 2008
- 年：2008
- 卷：8
- 期：9
- 页码：3401-3407
- 全文大小：320K
- 年卷期：v.8,no.9(September 3, 2008)
- ISSN：1528-7505
文摘
Solvothermal reactions of 4,4′-methylene-bis(3-hydroxy-2-naphthalene carboxylic acid) (H4mbna), heterocyclic bidentate ligands, and Cd(II) salts yielded four zero- to two-dimensional coordination complexes, [Cd(phen)2(H2O)2](H2mbna)·(H2O) (1), {[Cd4(H2mbna)8/2(phen)4]·2DMF}n (2), [Cd(H2mbna)(bipy)(H2O)]n (3), and (Δ,Δ)- [Cd(H2mbna)(bipy)2]n (4). Crystal structural analyses revealed that the zero-dimensional units of 1 are connected by hydrogen-bond interactions forming a two-dimensional double-layer with hollow structure. The dinuclear units in 2 are bridged by the carboxylate groups of H2mbna producing a two-dimensional nanoporous layer with the size about 11 × 15 Å2. The zigzag chains in 3 are linked by hydrogen bonds constructing the nanotube structure with the size about 11 × 13 Å2. The chiral chain in 4 is formed by the introduce of the Δ-configuration 2,2′-bipyridine ligands. The differences in the structures of the four complexes indicate that the anion of the metal salts might act as a template in the formation of the solid product. The thermal property studies show that all of the four complexes are thermally stable. The title complexes also displayed structure-related photoluminescence properties in the solid state.