聚喹啉的合成和性能研究

In order to synthesize the functional polyquinolines(such as proton conducting polyquinolines and optically active polyquinolines) and investigate structure-property relationships, four of bis(o-aminobenzophenone) monomers, two of new diacetyl monomers containing isomeric pyrrole units and three of new diacetyl monomers containing 1,1'-binaphthyl units were synthesized and characterized. Eight of new polyquinolines and polyanthrazolines with isomeric pyrrole units in main chain were synthesized and characterized. The new polymers show high glass transition temperatures(Tg = 242-339℃) and excellent thermal stability(Td = 514-554°C in nitrogen, TGA). Polyanthrazolines with 2,5-pyrrole linkage show a unusually highλamax (565 nm) and small band gap (2.02 eV). The electrochemical behaviors of polyquinolines were investigated by cyclic voltammetry, which show that polyquinolines have 1~3 irreversible oxidation and 1~2 quasi-reversible or irreversible reduction. A high-concentration solution of polyquinoline with 2,4-pyrrole linkage in DMAc was cast to membrane that possesses good thermal and mechanical property. The membrane was doped with phosphoric acid in ethanol solution, and shows high proton conductivity, reaching 1.5×10-3 Scm-1 at 157℃. Polyquinolines containing 1,1'-binaphthyl units in main chain were synthesized and characterized. The new polymers show high glass transition temperatures (Tg = 201-305℃) and excellent thermal stability (Td = 420-497°C in nitrogen, TGA) and insolubility in many common organic solvents. Their specific optical rotation is higher than 1,1'-binaphthyl monomer in concentrated sulfuric acid, and increased with the excess enantiomer percentage of monomers increased, but the direction of rotation is not same with their monomer.

利用聚喹啉的高热稳定性、高机械性能、溶解性、耐水解性，设计全盛新型的全共轭聚喹啉，包括旋光性聚喹啉。研究其在光电、拆分等方面的功能，比较旋光性聚喹啉和相应的非旋光性聚合物的性能，以阐明手性高分子在结构与性能方面的关系。