From Hydrogen-Bonded Net-to-Net Framework to Twofold Interpenetrated (4,6) Net: Effect of Ligand Topology on the Supramolecular Structural Diversity

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• 作者：LiJun Zhou ; YaoYu Wang ; CaiHua Zhou ; CuiJuan Wang ; QiZhen Shi ; ShieMing Peng
• 刊名：Crystal Growth & Design
• 出版年：2007
• 出版时间：February 2007
• 年：2007
• 卷：7
• 期：2
• 页码：300 - 306
• 全文大小：318K
• 年卷期：v.7,no.2(February 2007)
• ISSN：1528-7505

文摘

Two novel metal-organic frameworks (MOFs) of Co(II), {[Co(bpdc)(bpdap)]·1.5H₂O}_n (1) and [Co(bpdc)(Hpb)(H₂O)]_n (2) (bpdap = N,N'-bis(2-pyridyl)-2,6-diaminopyridine, H₂bpdc = biphenyl-4,4'-dicarboxylic acid, and Hpb = 2-(2-pyridyl)-benzimidazole), have been synthesized by a hydrothermal method and structurally characterized. The structure determination revealsthat both 1 and 2 crystallize in a triclinic system, space group P. Complex 1 has a 1D zigzag chain where Co(II) is bridged by bpdcin alternate bis(monodentate) and bis(chelate) manners and extends to form a 2D rectangular grid (RG) framework stacking in astaggered manner through hydrogen bonding and - interactions to form a net-to-net supramolecular network with a small channelalong the c-axis, which accommodates the water molecules. In the case of 2, a zigzag chain with Co(II) connected by bis(monodentate)bpdc results in a 2D RG network based on hydrogen bonding, and every two networks interlock slantwise forming a twofoldinterpenetrated (4,6) net framework that is stabilized by C-H··· interactions. Magnetic measurement reveals that both 1 and 2present weakly antiferromagnetic behavior.