Synthesis And Self-Assembly Of Platinum(Ⅱ)Complexes And Synthesis Of Asymmetric Supramolecular Core

This thesis contains five parts.1) Introduction.2) Synthesis and Characterization of Platinum(Ⅱ) Complexes and Their Self-Assembled Behaviors in Water.3) Synthesis and Characterization of A Podand-like Platinum(Ⅱ) Complex and Its Host-Guest Recognition with Dibenzylammonium Hexafluorophosphate.4) Synthesis and Characterization of Triple Asymmetric Conjugated Core.5) Conclusion of This Thesis.In chapter one, the concept of supramolecular chemistry is briefly introduced. And then, we describe supramolecular self-assembly on the basis of electrostatic interaction and host-guest recognition. Finally, we review the luminescence principles of platinum(Ⅱ) complexes and discuss the progress and application in the field of opto-electronics.In chapter two, we report the synthesis and characterization of platinum(Ⅱ) complexes and their self-assembled behaviors in water. Firstly, we synthesized two Pt (Ⅱ) complexes of FPtNC3and FPtNC12. They have been characterized by using1H NMR,13C NMR and MS. Secondly, it is interesting to note that FPtNC3can self-assemble to form fibrous nanostructures and emits simultaneously from monomer and aggregate excited states in water. The incorporation of DTAB with different molar ratios into the aqueous solution of FPtNC3leads to the formation of nanostructures ranging from ribbon to sheet. When the molar ratio of FPtNC3with DTAB was controlled at1:30, the emission intensity and quantum yield are156and17times than those of pure FPtNC3in water, respectively. Thirdly, when combining cationic FPtNC3with negative PEO-PAA, PAA, PSS and polyoxometalates, both the self-assembled morphologies and luminescence respond accordingly.In chapter three, the synthesis of a platinum(Ⅱ) complex with a podand ligand and its host-guest recognition with dibenzylammonium hexafluorophosphate are reported. The properties and mechanism of the host-guest recognition system have been investigated by1H NMR and luminescence spectrum. However, no host-guest recognition occurs between the podand-like platinum(II) complex and dibenzylammonium hexafluorophosphate.In chapter four, the synthesis and characterization of asymmetric conjugated core are reported in detail. AB2-and A2B-like monomers are designed as target molecules, where B stands for a2-benzo[24]crown-8(DB24C8) ring and A stands for a secondary amine group. Asymmetric conjugated core have been synthesized via a series of Sonogashira coupling reactions. Each product has been characterized using1H NMR,13C NMR and MS.In chapter five, we conclude the thesis and make a plan of the research.