Photoluminescence behaviors of organic soluble DNA bearing carbazole and pyrene derivatives as side-chain substituents and effect of the copolymer structure on the förster energy transfer process

U. R A Lee, Eun Lee Jung, Min J U Cho, Hwan Kim Kyung, Wan Kwon Young, Jung I L Jin, Dong Hoon Choi

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Organic soluble DNA bearing two different fluorophores in the side chain was prepared by reacting purified DNA with the cationic molecules 9-(12-bromododecyl)-9H-carbazole and (E)-l-(4-(12-bromododecyloxy)styryl)pyrene in water. Two homopolymers (CzDNA and PyDNA) and random copolymers (CzDNA-co-PyDNA) were prepared successfully. The absorption and photoluminescence (PL) behavior of CzDNA-co-PyDNA with pyrene derivative concentrations was investigated. As reference, we employed a guest-host system and polymer blends using DNA homopolymers. The Förster energy transfer process was investigated in three different DNA systems. The DNA copolymer system showed much better energy transfer efficiency than the other DNA systems. The copolymers were mixed with 2-{2-[2-(4-diethylamino-phenyl)-vinyl]-6-methyl- pyran-4-ylidene}-malononitrile (DCM) at an optimum, concentration. At low DCM concentration (0.3 wt %), undesired emissions were observed due to an incomplete energy transfer process from excited pyrene moieties. At high DCM concentration (5.0 wt %), red emissions were predominant; this is attributed to an efficient Förster energy transfer process.

Original languageEnglish
Pages (from-to)5416-5425
Number of pages10
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume47
Issue number20
DOIs
Publication statusPublished - 2009 Oct 15

Keywords

  • Biopolymers
  • Carbazole
  • Energy transfer
  • Fluorescence
  • Functionalization of polymers
  • Luminescence
  • Natural DNA
  • Photoluminescence
  • Photophysics
  • Pyrene

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Organic Chemistry

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