Structural, Luminescent, and Magnetic Properties of Three Novel Three-Dimensional Metal-Organic Frameworks Based on Hexadentate N,N’-bis(4-picolinoyl)hydrazine was written by Fang, Zhen-Lan;Yu, Rong-Min;He, Jian-Gang;Zhang, Qi-Sheng;Zhao, Zhen-Guo;Lu, Can-Zhong. And the article was included in Inorganic Chemistry in 2009.COA of Formula: C12H8N4O This article mentions the following:
Three novel microporous three-dimensional (3-D) metal-organic framework materials [ML]n [M = Ni (I); M = Co (II), M = Cd (III); L = N,N’-bis(4-picolinoyl)hydrazine] were obtained from hydrothermal reactions. The organic ligand L was formed through the in situ ring-opening hydrolysis reaction of 2,5-bis(4-pyridyl)-1,3,4-oxadiazole with the assistance of metal ions. Single-crystal x-ray diffraction studies reveal that complexes I, II, and III adopt 6-connected 3-dimensional networks of distorted α-Po topol., which are built from noninterpenetrated (4,4) grids cross-linked by zigzag chains. These isomorphic complexes are all of high thermal stability, but some other phys. properties are quite different because of their different metal centers. Antiferromagnetic exchange was observed between the Ni(II) centers of I, while ferromagnetic exchange was observed for the Co(II) centers of II. III exhibits strong fluorescence emission. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7COA of Formula: C12H8N4O).
2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.COA of Formula: C12H8N4O