Syntheses, structural characterization and fluorescent properties of 3D copper(I) coordination polymers with extended π···π interactions was written by Huang, Ting-hong;Zhu, Sheng-lan;Yang, Hu;Zhao, Bin;Yang, Yan. And the article was included in Wuji Huaxue Xuebao in 2016.Quality Control of 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole This article mentions the following:
Two copper(I) coordination polymers, {[Cu4(4-bpo)4(CH3CN)4](BF4)4}n (1) and {[Cu3(4-bpo)2(4,4′-bipy)(CH3CN)6](BF4)3}n (2) (4,4′-bipy = 4,4′-bipyridine, 4-bpo = 2,5-bis(4-pyridyl)-1,3,4-oxadiazole), have been synthesized and characterized by IR, 1H NMR, 19F NMR, 11B NMR and x-ray crystal structure anal. Structural anal. shows that complex 1 contains repeat “8”-shape building units that are linked to each other by the bridging coordination action of 4-bpo, forming a 3D network. The introduction of 4,4′-bipyridine results in the size variance of complex 2, which consists of 1D meso-helical chain, 2D multilayer architecture and 3D network formed by intermol. π···π interactions and hydrogen bonds. All these indicate that the change of secondary ligand might be the key of the extended supramol. networks of the lower-dimensional coordination polymers. Moreover, solid-state emission spectrum of complex 1 displays the existence of ILCT excited states. CCDC: 1043969, 1; 1043970, 2. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Quality Control of 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole).
2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Quality Control of 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole