Supramolecular Coordination Complexes with 5-Sulfoisophthalic Acid and 2,5-Bipyridyl-1,3,4-Oxadiazole: Specific Sensitivity to Acidity for Cd(II) Species was written by Li, Cheng-Peng;Yu, Qian;Chen, Jing;Du, Miao. And the article was included in Crystal Growth & Design in 2010.Electric Literature of C12H8N4O This article mentions the following:
CdII, CoII, NiII, and PbII mixed-ligand coordination complexes based on 5-sulfoisophthalic acid (H3sip) and the bent dipyridyl ligand 2,5-bis(3-pyridyl)-1,3,4-oxadiazole (3-bpo) or its 4-pyridyl N-donor analog (4-bpo) were synthesized and fully characterized by IR spectra, microanalyses, and single crystal and powder x-ray diffraction techniques. The significant pH effect on assembly of the CdII complexes was demonstrated, which gives distinct crystalline products, whereas the CoII, NiII, and PbII systems are independent to pH condition of the synthetic reaction. The eight prepared complexes display various coordination motifs with different existing forms, conformations, and coordination modes of the organic ligands. Further, extended supramol. networks are constructed via secondary interactions such as H-bonding and aromatic stacking. Solid-state properties of thermal stability and fluorescence for these crystalline materials are also presented. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Electric Literature of C12H8N4O).
2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Electric Literature of C12H8N4O