Abstract
Abstract There are two parts in the thesis. The first part is the synthesis and properties of 9,9’-spirobifluorene-configured bipolar systems. Triphenylamine is chosen as a donor, and oxadiazole moiety is chosen as a acceptor. The different numbers of donors and acceptor have been introduced to give oligoaryls（D2A2、D2A1、D1A2、D1A1）. The photoinduced electron transfer is observed in all of the bipolar system. Their electrical and photophysical properties are characterized with different numbers of donor and acceptor, and the molecular band gap can be well-tuned by altering the number of donor and acceptor respectively. The second part is the synthesis and properties of color tunable fluorene-based materials. Based on previous our research results, tertfluorene derivatives are excellent blue emitters with high quantum yield, thermal stability, and etc. The thermal decomposition temperature of 9-biphenyl-9-phenyl-fluorene containing terfluorene is 550 oC. Due to the high thermal stability, we apply 9-biphenyl-9-phenyl-fluorene as a terminal group. Thus a series of novel compounds were synthesized by Suzuki coupling reaction with different core units. The physical properties of these novel oligoaryls were investigated and correlated to with different structural characteristics of the core units.
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