| With the advancement of the syntheses and research in functional complexes, the studies on spin crossover (SC) materials with potential application in information storages, molecular display devices etc. have developed rapidly. In this thesis, a series of 1,2,4-triazole and its derivatives ligands have been synthesized. Constructed by these ligands, fourteen new Fe(Ⅱ) complexes have been determined by X-ray single-crystal diffraction analysis. A nano film and a nano particle have been synthesized using hybridization of a polymer and SC material, its application as a complex material was researched tentatively. The main contributions in this work are blow:1. One mononuclear Fe(Ⅱ) complex and two binuclear Fe(Ⅱ) complexes were synthesized using benzene- and pyridine-triazole moieties as ligands. One of them exhibits both temperature and pressure induced SC behavior.2. Among eight of the 1D and 2D Fe(Ⅱ) complexes prepared by ligation of m- and p-benzylbitriazoles, six are characterized to be pressure induced SC behavior.3. Three Fe(Ⅱ) complexes were synthesized employing bitriazole and oxalic acid ligands, their magnetic properties have been studied and compared with the ones synthesized being oxalic acid free.4. Polyvinylpyrrolidone (PVP) has been chosen as a macromolecular substrate while an ordered spin crossover-macromolecule composite nano film material has been obtained. Its structure and magnetic properties pursued, consequently, a simple method has been raised to connect the traditional macromolecules with the functional complexes. Furthermore, a SC cored and PVP shelled nano particle has been successfully synthesized and characterized in aqueous condition. |
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