Synthesis And Properties Of Supram Olecular Complexs Based On 3-phenyl-2-cyano-arylic Acid

The design and synthesis of supramolecular complexes become one of the hot spot of current research,not only due to their beautiful topologies, but also for their potential applications in host-guest chemistry, gas separation and storage, magnetic and catalysis. In this study, we focus on 3-phenyl-2-cyano acrylic acid as the basic building block to synthesize five new supramolecular complexes. And they were characterized by means of single X-ray crystallography, IR, UV, solid sate emission, photocatalytic activity for further research of their useful properties.1、Under the condition of solvent-thermal method afforded three compound,formulated as [Pipz H22+]·2[L(Cl)-](1), [Pipz H22+]·2[L(CH3)-](2), [Pipz H22+]·2[L(OH)-]·2H2O(3), Single-crystal structure analysis shows that 1 exhibits a 1D chain structure and the 1D chain further interdigited with the adjacent six chains to formed an interesting 7-fold 1D-3D interdigited structure. 2 show 2D network with brick-wall structure and the 2D network further interdigited with adjacent two network, giving a 2D-3D interdigited structure, 3 displays 1D chain structure and the 1D chain interdigited with adjacent chains to produce a 1D-2D interdigited structure. In addition, the compound 3 show crystal-to-crystal transformation properties. Through UV-Vis analyses the calculated band gap energy of 1, 2 and 3 are 2.67, 2.84 and 2.91 e V, respectively. The three compounds were applied to photocatalytic degradation of methyl orange. The results show that compounds 1, 2, 3 exhibit photocatalytic activity of 96 %,83 %,5 %. Furthermore, the possible mechanism for the photocatalytic degradation of methyl orange on these compounds is proposed.2 、 Under the condition of solvent thermal structure of two identical supramolecular compounds were synthesized, as Mn(L(Cl))2(4,4’-Bipy)(4), Co(L(Cl))2(4,4’-Bipy)(5). Single crystal analyses reveal that the two complexes show 2D 4,4-net structures, and the nets are further interdigited with two adjacent nets by the L(Cl) arm to form a 3D network. In the network, the phenyl rings stack in a herringbone fashion, no π-π interaction is observed. The photocatalytic degradation of methyl orange reveals that only 4 shows catalytic activity.