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Synthesis and optical properties of copolymers containing electron transporting 1,3,4-oxadiazole pendant groups

Title
Synthesis and optical properties of copolymers containing electron transporting 1,3,4-oxadiazole pendant groups
Authors
Wang, H[Wang, Hui]Ryu, JT[Ryu, Jeong-Tak]Han, YS[Han, Yoon Soo]Hur, Y[Hur, Youngjune]Park, LS[Park, Lee Soon]Song, M[Song, Minhyeon]Kwon, Y[Kwon, Younghwan]
DGIST Authors
Han, YS[Han, Yoon Soo]
Issue Date
2006
Citation
Molecular Crystals and Liquid Crystals, 459, 109-118
Type
Article
Article Type
Article
Keywords
1,3,4-OxadiazoleCopolymersElectron Energy LevelsEnergy GapHole TransportN-AlkylcarbazoleOrganic CompoundsPolycondensationSynthesis (Chemical)Triaryl Amine
ISSN
1542-1406
Abstract
Well-defined copolymer, P(3,6-EHCZ-alt-MPAOXD), containing a triarylamine and N-alkylcarbazole groups (as hole transport moieties with blue emission) in the main chain and a 1,3,4-oxadiazole pendant group (as an electron transporting moiety) was synthesized by Pd-catalyzed polycondensation of N-(2-ethylhexyl)-3,6-dibromo carbazole with 2-methylphenyl-5-(4-aminophenyl)-1, 3,4-oxadiazole. For comparison, P(3,6-EHCZ-alt-AL) containing a triarylamine and a carbazole groups in the main chain was also prepared. P(3,6-EHCZ-alt-AL) exhibited λmax,UV at 309 nm and λmax,PL in the range of blue emission at 452 nm. However, P(3,6-EHCZ-alt-MPAOXD) exhibited λmax,UV at 283 nm with a new peak at 359 nm, and red-shifted PL emission at 506 nm, possibly attributed to the extended conjugation by 1,3,4-oxadiazole pendant group. The electrochemical results revealed that incorporation of 1,3,4-oxadiazole group in the polymer side chain provided a closely matched HOMO energy levels with hole-injecting PEDOT layer, and reduced the band gap energy level.
URI
http://hdl.handle.net/20.500.11750/2527
DOI
10.1080/15421400600930409
Publisher
Taylor and Francis Ltd.
Files:
There are no files associated with this item.
Collection:
ETC1. Journal Articles


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