title: New water-soluble cationic poly(p-phenylenevinylene) derivative: the interaction with DNA and selective fluorescence enhancement induced by ssDNA.
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.
authors: Department of Chemistry, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Wuhan University, Wuhan 430072, P. R. China.
authors: Wenjun
authors: W
authors: Zhang
authors: Li
authors: L
authors: Xu
authors: Jingui
authors: J
authors: Qin
authors: Chuluo
authors: C
authors: Yang
mesh_terms: D004247:DNA / Q000737:chemistry*; D005453:Fluorescence; D011108:Polymers / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry; D014867:Water / Q000737:chemistry*
chemical_list: D011108:Polymers; D011145:Polyvinyls; D013501:Surface-Active Agents; C470024:poly(4-phenylenevinylene); D014867:Water; D004247:DNA