화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.17, No.4, 245-249, April, 2009
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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 Shin1, Yong-Rok Kim1, Ik Joong Kang2, and John A. Mikroyannidis3
  • Department of Chemistry and Center for Advanced Materials Chemistry, Korea University, Seoul 136-701, Korea
  • 1Department of Chemistry, Yonsei University, Seoul 120-749, Korea
  • 2Department of Chemical and Bio Engineering, Kyungwon University, Gyeonggi 461-701, Korea
  • 3Chemical Technology Laboratory, Department of Chemistry, University of Patras, GR-26500 Patras, Greece
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A fluorescing, copolymer (Q)-bearing, quaternary ammonium pendant was mixed with excess natural salmon sperm DNA with a molecular weight of 1.3×10^(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.
Keywords:DNA;fluorescence;complexation;polyelectrolyte;conjugated polymer.
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