70686-51-0Relevant articles and documents
Synthesis and properties of novel TEMPO-contained polypyrrole derivatives as the cathode material of organic radical battery
Xu, Lihuan,Yang, Fang,Su, Chang,Ji, Lvlv,Zhang, Cheng
, p. 148 - 155 (2014)
Two 2,2,6,6-tetramethylpiperidinyl-N-oxy (TEMPO) contained polypyrrole (PPy) derivatives with the different side-chain length were synthesized by esterification of 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl free radial with pyrrole butyric acid and pyrrole caproic acid. Then the homopolymers of 4-(3-(Pyrrol-1-yl)butyryloxy)-2,2,6,6-tetramethylpiperidin-1-yloxy (PPy-B-TEMPO) and 4-(3-(Pyrrol-1-yl)hexanoyloxy)-2,2,6,6-tetramethylpiperidin-1-yloxy (PPy-C-TEMPO) were prepared by chemical oxidative polymerization. The structure, morphology, electrochemical properties of prepared polymers were characterized by fourier transform infrared spectroscopy (FTIR), ultraviolet visible spectroscopy (UV-vis), scanning electron microscopy (SEM), cyclic voltammograms (CV) and electrochemical impedance spectra (EIS), respectively. Also, the charge-discharge properties of the prepared polymers were studied by galvanostatic charge-discharge testing. The results demonstrated that the as-synthesized nitroxide radical polymers showed a reversible two-electron redox reaction process in the potential limits of 2.5-3.0 V and 3.4-3.8 V vs Li/Li+, respectively. Under our experimental conditions, PPy only presented the discharge capacity of 16.5 mAh·g-1 at 20 mA·g-1 between 2.5 and 4.2 V, while PPy-B-TEMPO with the short side-chain linked to TEMPO groups exhibited an initial discharge capacity of up to 86.5 mAh·g-1 with two well-dened plateaus. Furthermore, the PPy-C-TEMPO with the longer linking side-chain even displayed a discharge capacity of 115 mAh·g-1. These superior electrochemical performances were ascribed to the flexible linking side-chain and the introduction of stable conductive PPy main chain, which benefits the improvement of charge carrier transportation in the aggregated polymer bulk.
"Growth from surface" Methodology for the Fabrication of Functional Dual Phase Conducting Polymer polypyrrole/polycarbazole/Polythiophene (CP/polyPyr/polyCbz/PolyTh)-Carbon Nanotube (CNT) Composites of Controlled Morphology and Composition - Sidewall versus End-Selective PolyTh Deposition
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Paragraph 0249, (2013/03/26)
A “growth from the surface” method for selectively depositing oxidative Liquid Phase Polymerizations (LPPs) onto the carbon nanotube (CNT) surface, said method comprising steps of: a. obtaining Multi-walled Carbon Nanotubes (MWC-NT); b. oxidized said MWCNTs to obtain oxidized COOH-MWCNTs; thereby (a) carboxylative opening oxidation-sensitive end-caps (polyCOOH end cluster); and, (b) introducing defect carboxylic (COOH) groups onto predetermined areas of said oxidized COOH-MWCNTs; c. COOH activating the polyCOOH shell using various COOH activating species; and, d. executing Liquid Phase Polymerization (LPP) oxidative depositing polymers selected from said polyCOOH polyTh-CP polymers, polyCOOH poly-Th-, polyEDOT (PEDOT)-, polyTh polyCOOH poly(thiophenyl-3 acetic acid, thiophenyl-3 acetic acid/EDOT, polyX, wherein X is elected from COOH, OH, NH2, polyCbz/polyPyr CP polymers and related combinatorial mixtures, polyCOOH PEDOT-poly(thiophenyl-3 acetic acid)′ thereby selectively depositing said oxidative LPPs onto said CNT surface.
Synthesis of 3-aryl-8-oxo-5,6,7,8- tetrahydroindolizines via a palladium-catalyzed arylation and heteroarylation
Gracia, Stephanie,Cazorla, Clement,Metay, Estelle,Pellet-Rostaing, Stephane,Lemaire, Marc
supporting information; experimental part, p. 3160 - 3163 (2009/08/07)
A selective palladium-catalyzed arylation and heteroarylation of 8-oxo-5,6,7,8-tetrahydroindolizines has been developed. Mechanistic studies assume an electrophilic substitution pathway for this transformation. This method provides an efficient one-step s
