Mixed-ligand metallosupramolecular complexes with Br-n-terephthalic acid (n=1 or 4) and a versatile bent dipyridyl tecton: Structural modulation by substituent effect of the ligand and metal ion

作者：Li Cheng Peng; Chen Jing; Du Miao^*

来源：Polyhedron, 2010, 29(1): 463-469.

DOI：10.1016/j.poly.2009.06.041

• Metallosupramolecular complex
• Crystal structure
• Substituent effect
• Secondary interaction
• In situ ligand reaction

This work presents a series of Zn-II, Cd-II, Co-II, and Pb-II supramolecular complexes assembled from a bent dipyridyl derivative 2,5-bis(3-pyridyl)-1,3,4-oxadiazole (3-bpo) and different dicarboxyl co-ligands 2-bromoterephthalic acid (H(2)BTA) and tetrabromoterephthalic acid (H(2)TBTA). All products have been prepared under similar conditions and characterized by IR, microanalysis, and TG-DTA techniques. Single-crystal X-ray diffraction indicates that these complexes display mononuclear, 1-D, and 2-D coordination motifs, and diverse higher-dimensional extended networks are further constructed via additional secondary interactions such as H-bonding and aromatic stacking. Notably, in situ hydrolysis reaction of 3-bpo is observed in the Pb-II complex with H(2)TBTA, affording another dipyridyl-type ligand N,N'-bis(3-picolinoyl)hydrazine (3-bph). These results evidently reveal the significant substituent effect of terephthalic acid in structural direction of these metallosupramolecular that are also regulated by the selection of metal ions.

• 出版日期2010-1-13
• 单位天津师范大学