화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.23, No.1, 30-37, January, 2015
DOI10.1007/s13233-015-3003-7  Export Citation
Enhanced thermo-stability and luminecent property of D-A copolymer based on fluorene and thieno[3,4-c]pyrrole-4,6-dione by incorporation of pentafluorobenzene group
Wen Wang, Luying Liang, Minglu Zhou, Minmin Sun, Shuhui Yan, and Qidan Ling†
  • Fujian Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, Fuzhou, 350007, P. R. China
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A new monomer 1,3-dibromo-5-perfluorophenyl-thieno[3,4-c]pyrrole-4,6-dione was synthesized and the corresponded D-A copolymer poly{9,9-dioctylfluorene-2,7-diyl-alt-5-perfluorophenylthieno[3,4-c]pyrrole-4,6-dione} (PFFTPD) based on fluorene unit was synthesized. In order to investigate the effect of pentafluorobenzene substitution on the photo-physics and stability properties, the compared D-A copolymer poly{9,9-dioctylfluorene-2,7-diylalt-5-octylthieno[3,4-c]pyrrole-4,6-dione} (PFCTPD) based on fluorene and octyl-thieno[3,4-c]pyrrole-4,6-dione was synthesized also. The obtained copolymer PFFTPD had a weight average molecular weight of 12178 with a narrow polydispersity index of 1.51, good solubility and higher thermal stability with T g of 131 ℃ and T d of 410 ℃. Compared to that of PFCTPD, the PL spectra of PFFTPD in solution and in thin film showed narrower half peak width and weaker shoulder peak in the long wavelength region. The luminescent efficiency and color purity were enhanced while lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) levels were decreased by incorporation of pentafluorobenzene group. Thus, the copolymer PFFTPD may be good candidate as emitting material applied in polymer light emitting diode (PLED).
Keywords:thieno[3,4-c]pyrrole-4,6-dione unit;fluorene unit;pentafluorobenzene group;luminescent property
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