Including The Preparation And Properties Of Pairs Of Carboxyl Schiff Base Complex Nano-structure Materials

In this work, six kinds of bis-carboxyl Schiff base ligands were synthesized by using p-aminobenzoic acid, glycine, p-phthalaldehyde, m-phthalaldehyde, o-phthalaldehyde and glyoxal. Transition metals ferric(III), cobalt( II), nickel( II), copper( II ),zinc( II) were complexed with these ligands and a series of complex nano-structure materials were obtained.Modern characterization methods including IR, XRD, TG-DTA, TEM and SEM were employed to analyze the structures and morphologies of such materials. The complexes formed layered structures of page shape and broad lamellar shape under certain conditions. The effects to morphologies of complexes were studied by changing preparation methods, the temperature of the reaction and templates. The optimal reaction conditions for preparing layered complexes (such as 85℃constant temperature, water bath for 24h as well as adding surfactant CTAB) were obtained. The assemble mechanisms of layered structure morphologies of complexes were investigated, which demonstrated that the formation of layer structure may be attributed to pillaring of ligand and intercalating of surfactant.Photoluminescence properties of complexes were tested by fluorescence spectroscopy. Comparing with Schiff base ligands, most of them were fluorescence quenching, but complexes of zinc had favorable fluorescence response, some of them even had better fluorescence intensity than their ligands, which indicated that they were a kind of fluorescence enhancement materials.Surface-enhanced Raman spectroscopy (SERS) of the prepared complexes was investigated on the metal complexes substrate by using 2-mercaptobenzothiazole as the probe molecule. As a result, some complexes with rough surfaces had SERS effects.Nano-scale and well-crystallined metal oxide particles were obtained by calcining their complex precursors at 800℃The phenomena of morphology transfer from precursors to metal oxides were observed by TEM. The ammonium perchlorate (AP) decomposition experiments were also carried out with the obtained metal oxides as catalysts, and the DSC results revealed that the metal oxides had good catalysis ability on AP decomposition process.