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SYNTHESIS OF polyfluorenes BEARING LATERAL PYRENE TERMINATED ALKYL CHAINS FOR DISPERSION OF SINGLE-WALLED CARBON NANOTUBES

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Chinese Journal of Polymer Science 2012年第3期30卷 405-414页

作者：薄志山 Institute of Chemistry Chinese Academy of Sciences

Two kinds of polyfluorenes 19earing two lateral pyrene terminated alkyl chains and two alkyl chains per repeating unit were synthesized by Suzuki polycondensation and used to disperse single-walled carbon nanotubes （SWCNT） in organic solvents. Stable polymer-SWCNT complex can be formed via the multivalent π-π stacking in＂.eraction of the lateral pyrene functional groups and the polyfluorene backbone with the outer surface of carbon nanotubes; meanwhile the lateral alkyl chains can impart good solubility to the complex. As expected, polyfluorenes bearing lateral pyrene functional groups and octyl chains exhibited much higher ,zarbon nanotube solubility in common organic solvents than the corresponding polyfluorenes bearing only octyl chains. Photophysical studies indicated that the formation ofpalymer-SWCNT complex can effectively quench the fluorescence of polyfluorenes.

关键词： Carbon Nanotubes polyfluorenes n-n stacking Suzuki polycondensation.

BLUE LIGHT-EMITTING POLY(FLUORENE-CO-BENZENE) CONTAINING AN OXADIAZOLE MOIETY

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Chinese Journal of Polymer Science 2004年第4期22卷 395-398页

作者：王利祥 State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

A new kind of polyfluorene containing oxadiazole as the side chain was synthesized. The introduction of oxadiazole moiety as more bulky group prevents the aggregation and reduces the crystallinity of the polymers. Efficient intramolecular energy transfer from oxadiazole moiety to the conjugated backbone has been realized, leading to 70% improvement of photoluminescence quantum efficiency of the designed polymers. Compared with PAF, the PFOXD exhibits significant improvement in electroluminescence properties, with luminous efficiency of 0.8 cd/A and maximum luminance of 1800 cd/m2.

关键词： polyfluorenes Oxadiazole Intramolecular energy transfer Photoluminescence quantum efficiency

A Robust and Soluble Nanopolymer Based on Molecular Grid-based Nanomonomer

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Chinese Journal of Polymer Science 2017年第1期35卷 87-97页

作者： Quan-you Feng Ye-long Han Meng-na Yu Bin Li Ying Wei 解令海黄维 Center for Molecular Systems and Organic Devices (CMSOD) Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts & Telecommunications Nanjing 210023 China Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University (NanjingTech) Nanjing 211816 China

Shape persistent conformations reduce the complexity of polymer materials. Herein, we propose a concept on the nanopolymer that is a nanoscale polymer chain with the repeat units of nanomonomers, In this article, a soluble organic nanopolymer of wide bandgap semiconductors was synthesized by the Yamamoto polymerization of nanogrid monomer as the repeat units with the rectangle size of -1.7 nm × 1.2 nm. The alkyl side chain substituent at 9-position of fluorenes guarantees the polygrid with excellent solubility. Tetrafluorenes in the conjugation-interrupted backbones of polygrid acts as the active light-emitting centers without obvious green band in the fluorescence spectra of the films after 10 h annealing at 180 ℃, indicating this nanopolymer exhibits excellent spectral stability. Such soluble nanopolymers will be the fifth- generation of macromolecular materials with a potential character of overall performance improvement.

关键词： Conformation polyfluorenes Polygirds Nanopolymers Nanomaterials Stability