Synthesis And Morphology Analysis Of Amphiphilic Rigid-Flexible Oligomers Possessing Conjugated Rod Domains

Aromatic rod molecules, consisting of hydrophilic flexible chains, in aqueous solution can self-assemble into various supramolecular structures through mutual interactions between aromatic rod-coil molecules and water, such as hydrophobic and hydrophilic interactions and π-π interaction. The self-assembly of aromatic rod molecules in water, therefore, can provide a strategy for the construction of well-defined and stable nanometer-sized structures with chemical functionalities and physical properties as advanced materials for photonic, electronic and biological applications.Firstly, we have synthesized cruciform molecules, consisting of 9,10-bis(arylethynyl) anthracene as a rigid rod segment with different degree of polymerization (DP) poly ethylene oxide as coil segments, moreover, their aggregation behaviors were analyzed on various concentration in different temperature in the solution.Secondly, we have synthesized H-shaped molecules. These molecules, consisting of conjugated rod segments with different degree of polymerization (DP) poly ethylene oxide as coil segments. Through horizontal and vertical contrast, we discussed the assembly behavior of target molecules in solution and their aggregation morphology.In this thesis, we have synthesized two series of copolymers successfully, the structures of target molecules are characterized by NMR and MALDI-TOF-Mass spectra. The self-assembling behaviors of these target molecules were analyzed by UV-vis absorption, fluorescence spectra, CD, DLS, AFM and TEM.