Synthesis, Characterization And Structure Of Supramolecular Complexes Of Hydrogen-bonding Connected With 4-acyl Pyrazolone And Imidazole, 2, 2'-bipyridine And 4, 4'-bipyridine

With the rapid growth in supramolecular chemistry in recent years, a great deal of effort has been devoted to the design and assembly of supramolecular compounds, for these compounds have potential applications in catalyses, molecular recognition, molecular electronics, photonic materials and so on. Moreover, the syntheses of various supramolecular compounds help to obtain new information of intermolecular interactions, which is apparently important for rational design and construction of new framework structures. Currently, a lot of researchers are focusing their attention on the crystal engineering of supramolecular architectures organized by coordinate covalent bonds or hydrogen bonds andπ-πstacking interactions. In particular, the hydrogen bonding has attracted most interest due to its relative strength and directionality in generating a great variety of one-(1-D), two-(2-D), and three-dimensional (3-D) either non-interpeneratiog open networks with variable cavities or channels of desire size, or well entangled structures through interpeneration.Pyrazolone and its derivatives form an important class of such compounds and have attracted considerable scientific and applied interest. Pyrazolones, especially 4-acyl-pyrazolone, display several different coordination modes with respect to classicalβ-diketonates . Therefore, the 4-acyl-pyrazolone derivatives are broadly used in many fields, especially in biological, clinical and analytical applications. The flexibility and conformational freedom of 4-acetyl-pyrazolone ligands give rise to a variety of interesting structural motifs. In our previous work, we have synthesized a series of 4-acyl-pyrazolone derivatives and reported several transition metal complexes, but no detailed studies on complexes containing 4-acetyl-pyrazolone and...