| Summary: | 碩士 === 國立中正大學 === 化學工程研究所 === 101 === Studies of Conjugated polymers have drawn tremendous research interest and industrial applications in recent years due to their potential applications in the field of organic light emitting polymers, solar cell materials and conducting polymers. In general, conjugated polymers can be divided into two categories, including main-chain and side chain conjugated polymers. In this study, we focus on the syntheses of syndiotactic polystyrene derivative based side-chain conjugated polymer, which may offer important industrial applications and unique photoluminescence properties. Three different tactic, including atactic, isotactic and syndiotactic poly-4-(9,9-dibutylfluorene-2-yl)styrene were synthesized, and their corresponding physical properties were examined. The following summarize the research work accomplished in this study:
4-(9,9-dibutylfluorene-2-yl)styrene monomer was synthesized by coupling 4-bromostyrene with aromatic boronic acid through palladium-catalyst-mediated Suzuki cross coupling reaction. The resulting 4-(9,9-dibutylfluorene-2-yl)styrene monomer exhibits light-emitting property as demonstrated by PL analyses.
Syndiotactic , Isotactic and Atactic poly-4-(9,9-dibutylfluorene-2-yl) styrene were synthesized by conducting the syndiospecific, isospecific and anionic polymerization of 4-(9,9-dibutylfluorene-2-yl)styrene in the presence of Cp*Ti(OMe)3/MAO, Nickel acetylacetonate and n-butyl lithium catalysts, respectively. In these studies, DMVPS were used as chain transfer agents to investigate its corresponding chain transfer efficiency and end-functionalization efficiency.The resulting syndiotactic, isotactic. atactic polymers were found not only to have the well-defined chemical structures but also to exhibit different light-emitting properties as demonstrated by PL analyses.
keywords: Suzuki cross coupling , light emitting polymers, PL analyses, Cp*Ti(OMe)3/MAO, Nickel Acetylacetonate, anionic chain polymerization.
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