Synthesis and two‐photon absorption properties of hyperbranched diketo‐pyrrolo‐pyrrole polymer with triphenylamine as the core |
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| Authors: | Yihua Jiang Yaochuan Wang Jianli Hua Sanyin Qu Shiqiong Qian He Tian |
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| Institution: | 1. Key Laboratory for Advanced Materials, Institute of Fine Chemicals and Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China;2. Department of Physics, Fudan University, Shanghai 200433, People's Republic of China |
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| Abstract: | A novel hyperbranched polyyne (hb‐ DPP ) with triphenylamine as the core, 2,5‐dioctylpyrrolo 3,4‐c]pyrrole‐1,4 (2H,5H)‐dione ( DPP ) as the connecting unit has been designed and synthesized by Glaser‐Hay oxidative coupling reaction, which was characterized by IR, NMR, UV‐vis, FL, and GPC. The polymer exhibits high molecular weight (Mw up to ～6.55 × 104 Da) and is readily soluble in common organic solvents such as toluene, chloroform, tetrahydrofuran, N,N‐dimethyl formamide and so on. The one‐ and two‐photon absorption (TPA) properties have been investigated. The TPA cross section of the polymer was measured by open‐aperture Z‐scan experiment using 140 femtosecond (fs) pulse, and the TPA cross section for hb‐ DPP was determined to be 579 GM per repeating unit at wavelength of 800 nm. In tetrahydrofuran, hb‐ DPP exhibits intense frequency up‐converted fluorescence with the peak located at 584 nm under the excitation of 800 nm fs pulses. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 4400–4408, 2009 |
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| Keywords: | conjugated polymers diketo‐pyrrolo‐pyrrole dyes/pigments synthesis triphenylamine two‐photon |
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