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Communication
New Water-Soluble Cationic Poly(p-phenylenevinylene) Derivative: the Interaction with DNA and Selective Fluorescence Enhancement Induced by ssDNA
Article first published online: 16 JAN 2013
DOI: 10.1002/marc.201200696
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Zhang, W., Xu, L., Qin, J. and Yang, C. (2013), New Water-Soluble Cationic Poly(p-phenylenevinylene) Derivative: the Interaction with DNA and Selective Fluorescence Enhancement Induced by ssDNA. Macromol. Rapid Commun., 34: 442–446. doi: 10.1002/marc.201200696
Publication History
- Issue published online: 28 FEB 2013
- Article first published online: 16 JAN 2013
- Manuscript Revised: 5 DEC 2012
- Manuscript Received: 24 OCT 2012
Keywords:
- conjugated polyelectrolytes;
- DNA;
- fluorescence;
- poly(p-phenylenevinylene);
- surfactants
Abstract
A new cationic cyano-substituted poly(p-phenylenevinylene) (N-CNPPV) is synthesized by Knoevenagel condensation. The water-soluble polymer shows different emission spectra in different solvents and displays unique fluorescent behaviors in the mixed solvents of water and THF. The new polymer can form a complex with ssDNA by adopting a more planar conformation, exhibiting red shift of emission wavelength and enhancement of fluorescence intensity. By investigating the fluorescent response of N-CNPPV to various surfactants, we demonstrate that the hydrophobic interaction and electrostatic interaction result in the selective response of N-CNPPV to ssDNA. This is the first report on selective fluorescence enhancement of conjugated polyelectrolyte induced by ssDNA.