Syntheses, structures, and properties of two new zinc(II) metal–organic frameworks based on flexible 1,6-bis(2-methyl-imidazole-1-yl)hexane ligand

• We through rational design have successfully synthesized two new zinc(II) compounds.
• Comparing complexes 1 and 2, the flexible ligand could form more complicated structure than the rigid ligand.
• Compounds 1 and 2 may be the excellent candidate for potential photoactive material.

Two new zinc(II) metal–organic compounds of [Zn(ADC)(bimh)]n (1) and [Zn(ADA)(bimh)]n (2) (H2ADC = 1,3-adamantanedicarboxylic acid, H2ADA = 1,3-adamantanediacetic acid, bimh = 1,6-bis(2-methyl-imidazole-1-yl)-hexane, have been structurally characterized by X-ray diffraction analysis. In compound 1, the zinc(II) ions are bridged by ADC and bimh ligands to form a 1D looped chain. In compound 2, the ADA molecules alternately bridge Zn(II) atoms to form infinite chains, and then the 1D chain is connected through the bimh ligand resulting in an undulating infinite two-dimensional (2D) polymeric network. Additionally, TG analysis, XRPD and fluorescent properties for compounds 1 and 2 are also measured and discussed.

Two new zinc(II) metal–organic compounds have been synthesized and characterized. In compound 1, the zinc(II) ions are bridged by ADC and bimh ligands to form a 1D looped chain. In compound 2, the zinc(II) ions are bridged by ADA ligands form a 1D chain, and then the 1D chain is connected through the bimh ligand resulting in an undulating infinite two-dimensional (2D) polymeric network. Comparing complexes 1 and 2, the use of flexible ligand can lead the compound more complicated than the rigid one. Additionally, TG analysis, XRPD and fluorescent properties for compounds 1 and 2 are also measured and discussed.Figure optionsDownload as PowerPoint slide