A New Carbazole-based Conjugated Multibranched Molecule and Its Tetramer as Hole Transporting Materials

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 thr...

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Published inChemistry letters Vol. 37; no. 9; pp. 952 - 953
Main Authors Lee, Tae Wan, Kim, Hong Suk, Cho, Min Ju, Kim, Kyuna Hwan, Choi, Dong Hoon
Format Journal Article
LanguageEnglish
Published TOKYO Chemical Soc Japan 05.09.2008
Subjects
Chemistry
Chemistry, Multidisciplinary
Physical Sciences
Science & Technology
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Summary: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.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.2008.952