Synthesis And Properties Of Functional Heteroatom Fused Organic Molecules

Hetero atom fused π-conjugated molecules have attracted increasing attention due to their excellent electrochemical, optical, physical and biological properties. They could self-assemble into one-dimensional columnar structures via strong π-π stacking interactions, and were consequently utilized in the fabrication of new functional materials as an excellent building-block. Modificating molecular skeleton by introducing heteroatoms such as fluorine, nitrogen and sulfur usually lead to dramatic changes in their physicochemical and/or electronic properties.The thesis is divided into three parts.Part Ⅰ:Synthesis and properties of novel fluorine substituted π-conjugated molecules. We synthesized fluorine substituted π-conjugated molecules and confirmed its structure by MALDI-TOF-MS spectrometry, UV-vis, fluorescence and infrared spectroscopy. TGA results of the compound suggested its high thermostability.Part Ⅱ:Properties of pyrimidine-fused π-conjugated molecules. The physicochemical properties of the rod-coil and PAH derivatives were characterized by UV-fluorescence spectroscopy, TGA, DSC, POM, SEM, TEM. And the possible application was evaluated.Part Ⅲ:Properties of thiophene-fused π-conjugated molecules. From the results of NMR and UV, we found that compounds in the selected solvent did not exist in monomer but in certain aggregates; TGA results suggested their high thermostability; and DSC results indicated that no phase transition within testing temperature range.