Organic soluble deoxyribonucleic acid (DNA) bearing carbazole moieties and its blend with phosphorescent Ir(III) complexes

Min J U Cho, U. R A Lee, Youn Sun Kim, Jicheol Shin, Young Min Kim, Young Wook Park, Byeong Kwon Ju, Jung I L Jin, Dong Hoon Choi

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A functionalzed deoxyribonucleic acid (Cz-DNA) was prepared with carbazolyl ammonium lipid as a triplet host material for phosphorescent material system. It is soluble in organic solvents, which facilitates the sample preparation for the absorption and luminescent properties in solid states. A highly soluble iridium complex, Ir(Cz-PPy)3 with carbazoly!-substituted 2-phenylpyridine ligands was employed for studying the phosphorescence in Cz-DNA. There is a good overlap between the photoluminescence spectrum of Cz-DNA and the metal-to-ligand charge transfer (MLCT) absorption bands of the iridium complex. This overlap enables efficient energy transfer from the excited state in the host to the M LCT band of Ir(Cz-ppy)3. In addition, photoluminescence quantum yield of Cz-DNA was found to be rela-tively larger than the copolymer (PCzSt) with vinylcarbazole and styrene. Thus, Cz-DNA was employed as a triplet host material for fabricating multilayered electrophosphorescence devices via modification of its property by doping 5,4-iert-butylhexyl-1,3,4oxadiazole (PBD). After doping 30 wt % PBD and 10 wt % Ir(Czppy)3 into Cz-DNA, we achieved much improvement in electron injection/transport from an adjacent carrier transport layer, resulting in much improved device performances.

Original languageEnglish
Pages (from-to)1913-1918
Number of pages6
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume48
Issue number9
DOIs
Publication statusPublished - 2010 May 1

Fingerprint

Bearings (structural)
Organic acids
DNA
Iridium
Photoluminescence
Ligands
Doping (additives)
Phosphorescence
Electron injection
Styrene
Carrier transport
Quantum yield
carbazole
Ammonium Compounds
Excited states
Energy transfer
Organic solvents
Lipids
Charge transfer
Absorption spectra

Keywords

  • Biopolymers
  • Carbazole
  • Electrophosphorescence
  • Iridium complex
  • Light-emitting diodes (lfd)
  • Luminescence
  • Photoluminescence

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Organic Chemistry

Cite this

Organic soluble deoxyribonucleic acid (DNA) bearing carbazole moieties and its blend with phosphorescent Ir(III) complexes. / Cho, Min J U; Lee, U. R A; Kim, Youn Sun; Shin, Jicheol; Kim, Young Min; Park, Young Wook; Ju, Byeong Kwon; Jin, Jung I L; Choi, Dong Hoon.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 48, No. 9, 01.05.2010, p. 1913-1918.

Research output: Contribution to journalArticle

Cho, Min J U ; Lee, U. R A ; Kim, Youn Sun ; Shin, Jicheol ; Kim, Young Min ; Park, Young Wook ; Ju, Byeong Kwon ; Jin, Jung I L ; Choi, Dong Hoon. / Organic soluble deoxyribonucleic acid (DNA) bearing carbazole moieties and its blend with phosphorescent Ir(III) complexes. In: Journal of Polymer Science, Part A: Polymer Chemistry. 2010 ; Vol. 48, No. 9. pp. 1913-1918.
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