A New Carbazole-based Conjugated Multibranched Molecule and Its Tetramer as Hole Transporting Materials
- Authors
- Lee, Tae Wan; Kim, Hong Suk; Cho, Min Ju; Kim, Kyuna Hwan; Choi, Dong Hoon
- Issue Date
- 5-9월-2008
- Publisher
- CHEMICAL SOC JAPAN
- Citation
- CHEMISTRY LETTERS, v.37, no.9, pp.952 - 953
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMISTRY LETTERS
- Volume
- 37
- Number
- 9
- Start Page
- 952
- End Page
- 953
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/122719
- DOI
- 10.1246/cl.2008.952
- ISSN
- 0366-7022
- Abstract
- A conjugated multibranched molecule. 1.3,5-tris{(E)-2-[9-hexyl-9H-carbazol-3-yl]vinyl} benzene (THCEB) and its tetramer, 1,3,5-tris((E)-2-{9-[6-(3-{(E)-3,5-bis[(E)-2-(9-hexyl-9H-carbazol-3-yl)vinyl]styryl} -9H-carbazol-9-yl)hexyl]-9H-carba-zol-3-yl}vinyl)benzene (4(THCEB)), have been synthesized through Heck coupling and Horner-Emmons reactions in moderately good yields. These compounds exhibited good self-film-forming properties by spin coating. These two large molecules showed an absorption maxima at around 346-348 tun in their solution states. The maximum PL intensities of THCEB and 4(THCEB) films were commonly observed at around 450 nm, except for a strong emission band at 535 nm in THCEB.. In the tetramer, the emission at 535 nm was highly Suppressed. This observation was explained in terms of the time-resolved photophysical properties of these molecules with the help of a possible mechanism.
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