Highly fluorescing solid dna-cationic polyelectrolyte complexes prepared from a natural DNA and a poly(fluorenevinylene-alt-phenylene) bearing quaternary ammonium pendants

Young Jun Yu, Young Wan Kwon, Kyu Nam Kim, Eui Doo Do, Dong Hoon Choi, Jung Il Jin, Hee Won Shin, Yong Rok Kim, Ik Joong Kang, John A. Mikroyannidis

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A fluorescing, copolymer (Q)-bearing, quaternary ammonium pendant was mixed with excess natural salmon sperm DNA with a molecular weight of 1.3 x 10 6(2,000 base pairs) to afford highly fluorescing, complex mixtures. The fluorescence life-time of the polymer Q was greatly increased when mixed with DNA: for the mixture of Q:DNA= 1:750 the fast and slow decay lifetimes increased from ca. 10 to 100 ps and from 20 ps to ca. 1 ns, respectively. The enhanced fluorescence of the mixtures was ascribed to efficient compartmentalization and reduced conformational relaxation of the polymer Q by complexation with excess DNA.

Original languageEnglish
Pages (from-to)245-249
Number of pages5
JournalMacromolecular Research
Volume17
Issue number4
DOIs
Publication statusPublished - 2009 Apr

Keywords

  • Complexation
  • Conjugated polymer
  • DNA
  • Fluorescence
  • Polyelectrolyte

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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