Study On Synthesis And Properties Of Fluorene-Azobenzene-Containing Polyacetylenes

At present, the azobenzene polymer are very useful in optical information storage materials, nonlinear optical materials, liquid crystalline materials, bioactive light control and nanomaterials, etc. Azobenzene polymer are becoming a new frontier in functional polymer materials, and show a broad application prospect, especially in the photochromic applications. In view of the significant application of the azobenzene polymer, four new fluorene-type azobenzene with a terminal propargyl functional group small molecule compounds, and three fluorene-type azobenzene polyacetylenes were synthesized and characterized by FT-IR and1H-NMR. Their thermal properties and optical properties were also investigated. The main contents of this thesis include the following points:1. The development of polyacetylenes and their derivatives, azobenzene polymers, and fluorene and its derivatives were reviewed briefly.2. Four new fluorene derivatives were designed and synthesized, and their structures were characterized by FT-IR and1H-NMR.3. Three fluorene-type homopolymer with azobenzene polypropargyl functional group were designed and synthesized using [Rh(nbd)Cl]2-Et3N as catalyst, and their structures were characterized by FT-IR and1H-NMR.4. The UV-vis absorption spectra of the monomers and polymers were studied, and the results showed that the maximum absorption peak of the polymer occurred red shift compared with their monomers, and it probably because the influence of the highly conjugated structure of the polymer.5. The TGA and DSC of the monomer and polymer were investigated. The results showed that the polymer had good thermal stability.