Polifloren Türevleri ve Polipirol Tabanlı Konjüge Polimerler

In this thesis, a series of polyfluorene based copolymers have been prepared via SuzukiCoupling for use in light emitting diodes (LEDs). Polyfluorene based polymers aresynthesized from different monomers. These polymers are characterized withspectroscopic techniques including FT-IR, UV-VIS, Fluorescence and 1H, 13C NMR.Conjugated polymers are attractive chemical structures inherently allowing chargetransport. However, in the solid state, conjugated polymers lack stability and formaggregates. To overcome this problem, conjugated polymers can be converted toinsulated molecular wires. This can be achieved by separation of the conjugatedpolymer chains by a macrocycle.In this study, encapsulation of conjugated polymers is tried with two methods. Firstmethod is to encapsulate the polymer main chain by macrocycles. Polypyrrole basedpolypseudorotaxane is prepared in this way. Pyrrole is complexed with thecucurbit[6]uril (CB(6)) and following chemical oxidation by FeCl3 in acidic mediumyields the desired polypseudorotaxane. Spectroscopic investigations such as FT-IR, UV-VIS, Fluorescence and 1H-NMR confirm the formation of polypyrrole basedpolypseudorotaxane.The second method involves the rotaxanation of the polymer side chains. For thispurpose, fluorene based monomers are chosen because the 9th position of fluorene canbe easily functionalized. After attaching suitable groups to the 9th position of fluorene,the rotaxane formation was attempted via 1,3 dipolar cycloaddition in the presence ofCB(6).A white light emitting diode is prepared using a hybrid inorganic and organic materialbased system. Prepared conjugated polymers were used in white light generation. Goodresults are obtained with high CRI indices. Also the thermal stability of the conjugatedpolymers is studied by FT-IR, UV-VIS and Fluorescence spectroscopic techniquesunder heat exposure.Keywords: Pseudopolyrotaxanes, cucurbit[6]uril, Suzuki Coupling, conjugatedpolymers, polyfluorene, polypyrrole, white light emitting diode.