Restricted Molecular Rotation and Enhanced Emission in Polymer Blends of Poly(fluorene-alt-naphthol) and Poly(vinyl pyrrolidone) with Mutual Hydrogen-Bond Interactions
作者： Rong-Hong Chien , Chung-Tin Lai , Jin-Long Hong
DOI: 10.1021/JP206388Y
关键词:
摘要: In this study, fluorescent alternative copolymer poly(fluorene-alt-1,6-naphthol) (PFN) with inherent hydroxyl (OH) groups was blended poly(vinyl pyrrolidone) (PVR) through facile hydrogen-bond (H-bond) interactions. The emission intensities of the resultant PFN/PVR mixtures different compositions were shown to increase increasing PVR content in both chloroform solution and solid film states. H-bond interactions between PFN resulted restricted molecular rotations fluorophores, which lead blockage nonradiative energy decay channels accompanied enhancement. With efficient interactions, blend low (2.33 wt %) component actually has a high quantum efficiency 0.93, comparatively higher than other blends containing PFN. role H-bonding on therefore evaluated by infrared, 1H NMR sp...
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