Ren, Yuanhang et al. published their research in CrystEngComm in 2011 | CAS: 15420-02-7

2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Formula: C12H8N4O

Three POM-based coordination polymers: hydrothermal synthesis, characterization, and catalytic activity in epoxidation of styrene was written by Ren, Yuanhang;Du, Chengbo;Feng, Sujiao;Wang, Chunling;Kong, Zuping;Yue, Bin;He, Heyong. And the article was included in CrystEngComm in 2011.Formula: C12H8N4O This article mentions the following:

Three polyoxometalates (POM)-based coordination polymers, [CuII2(C5H5NCOO)2(4-bpo)2(H2O)2]SiW12O40·H2O (1), [CuI4(4-bpo)6]SiW12O40·3H2O (2), and [CuI4(3-bpo)4]SiW12O40·3H2O (3), were hydrothermally synthesized from the mixture of H4SiW12O40, copper salts, and 3-bpo (2,5-bis(3-pyridyl)-1,3,4-oxadiazole) or 4-bpo (2,5-bis(4-pyridyl)-1,3,4-oxadiazole) and characterized by elemental anal., IR spectroscopy, TGA, and single crystal x-ray diffraction. The 4-bpo mols. are connected into an infinite double-chain in compound 1 as a bidentate ligand. Compound 2 contains large hexagonal prism shaped mol. cages defined by copper ions and 4-bpo mols. which wrap Keggin ions inside. In compound 3 {Cu2(3-bpo)2} mol. rings connect with Keggin ions to form a 1D chain. By inspection of the structures, the geometry and the coordination mode of bpo ligands play important roles in the formation of 1-3. The catalytic performance of 1-3 was studied for epoxidation of styrene using tert-Bu hydroperoxide (TBHP) as the oxidant. Compounds 1–3 present promising activity as heterogeneous catalysts while compound 1 exhibits the best yield of styrene epoxide. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Formula: C12H8N4O).

2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Many analogues of pyridine are known where N is replaced by other heteroatoms . Substitution of one C–H in pyridine with a second N gives rise to the diazine heterocycles (C4H4N2), with the names pyridazine, pyrimidine, and pyrazine.Formula: C12H8N4O

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem