Synthesis And Application Of Novel Ligand And Theoretical Calculation Of New Complexes

Metal-organic coordination complexes refer to the complexes composed of the metal ion and organic ligands through coordination bonds, hydrogen bonds and the interaction between the moleculars. Metal-organic coordination complexes have a wide range of potential applications in optics, molecular recognition and molecular devices fields because of their unique topological structures. We study mainly change of fluorescence intensity because of coordination. The property is used as detection of metal ion. In addition, we also study systematically facters affecting photophysical, charge-injection and change-transporting characteristics. The main results are as follows:(1) A novel β-diketon derivative was systhesized via radical polymerization with N-isopropylacrylamide(NIPAM) to form water-soluble polymers and gels, which can realize the detection of metal ions in the water system. In addition, the two polymers can be used as a temperature-controlled intelligent fluorescent material because of temperature sensitivity.(2) Diarylethene derivatives are a class of fascinating photochromic materials because of their open and clased isomers with different absorption spectra and many other characteristics. To reveal the detailed structure and optoelectronic properties as well as the effect of metal centres and substituents on them, a systematic study on a series of diarylethene derivatives and their Re(Ⅰ), Pt(Ⅱ) and Ir(Ⅲ) complexes was performed via theoretical calculation. Metal-coordination and substituents exhibit great influence on the photophysical charge-injection and charge-transportion characteristics. In addition, the binding of F-with the boron atom of dimesitylboryl group through Lewis acid/base interactions also induces great changes of structure, photophysical and electronic properties for these diarylethene derivatives, and consequently the compound with the substituent of dimesitylboryl group can be used as selective near-infrared phosphorescent F-probe.