S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Theses (Master's Degree_화학생물공학부)
Synthesis and characterization of poly(4`-(2,2-dialkynyl)ethenylstilbene-4-carboxylate)
Poly(4`-(2,2-dialkynyl)ethenylstilbene-4-carboxylate)의 합성 및 특성 연구
- Issue Date
- 서울대학교 대학원
- Mitsunobu 축합 반응; Mitsunobu condensation; 고차 가지 고분자; Hyperbranched polymer; 광발광; Photoluminescence
- Thesis (master`s)--서울대학교 대학원 :응용화학부,2003.
- Chromophoric interactions in conjugated polymers have critical effects on
performance of electroluminescence (EL) devices. One of the tactics to control
it is to optimize the degree of insulation with alkyl chains. So we suggested a
AB2 type hyperbranched copolymer system which have 4-ethenylstilbene as a
chromophore for A, and various alkyl chains for B. Via Heck reaction followed
by Sonogashira reaction, we successfully synthesized ready-to-polymerize
monomer with good yield, and the polymers were obtained through optimized
Mitsunobu condensation. Synthesized polymers showed moderate thermal
stability up to 300 oC. Compared with monomer, polymer solution in CHCl3
presented same absorption transition. In addition, λabs
maxs of polymer films
coated on to glass were blue shifted relative to polymer solution, and λems
of them were red shifted. As varying alkyl chain length from butynyl to
undecynyl, fluorescence quantum yields were increased 15-fold.
- Files in This Item: There are no files associated with this item.