A new carbazole-based conjugated multibranched molecule and its tetramer as hole transporting materials

Tae Wan Lee, Hong Suk Kim, Min Ju Cho, Kyung Hwan Kim, Dong Hoon Choi

Research output: Contribution to journalArticle

2 Citations (Scopus)

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-carbazol-3-yl}vinyl)benzene (4(THCEB)), have been synthesized through Heck coupling and Horner-Emmons reactions in moderately good yields. These compounds exhibited good selffilm-forming properties by spin coating. These two large molecules showed an absorption maxima at around 346-348 nm 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.

Original languageEnglish
Pages (from-to)952-953
Number of pages2
JournalChemistry Letters
Volume37
Issue number9
DOIs
Publication statusPublished - 2008 Sep 5

ASJC Scopus subject areas

  • Chemistry(all)

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