| Summary: | 碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系 === 97 === This research describes investigates the synthesis and photophysical characteristics of the novel Iridium complex, which are the 1,3,4-oxadiazole derivatives. The We synthesized electrophosphorescent polymers by of the conjugated polymers, polyfluorene (as host), and with the phosphorescent Ir complex (as dopant) using were synthesized by Suzuki Cross coupling reaction, this research investigates the synthesis and photophysical characteristics of the novel Iridium complex, which are the 1,3,4-oxadiazole derivatives.
The results showed that we have successfully synthesized the Iridium complex based on the ligand of 1,3,4-oxadiazole derivatives, which copolymerized with electrophosphorescent conjugated polymers based on conjugated polymer with Iridium complex, the structure of them are random copolymers. The POM results of electrophosphorescent polymers shows the Iridium complex solid film is amorphous solid film. The UV-Vis spectra of electrophosphorescent polymers have maximum absorption at 370 nm,, as in solution state, through the UV-Vis spectra it is suggested that input energy mainly is all absorbed by conjugated polymers via the solvent. The PL spectra of iriridium complex showed its the maximum emission peak at ca. 540 nm, and the emission peak of electrophosphorescent polymers located at ca. 420~440 nm. As the concentration of solution is in the ranging less than 0.1 w/v %, we found there is red shifted while the concentration is increased. As the concentration is around 1 w/v%, we found the input energy is suggested to transferred from conjugated polymer to Iridium complex. In the case, We also observed the same situation while the Iridium complex content was increased was also observed. Accordingly, the results of photophysical properties showed that energy transformation could be influenced not only by the concentration of solution but also by the amount of Iridium complex in the copolymer.
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