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Counter Cation (counter + cation)
Selected AbstractsCyclodextrin-Threaded Conjugated Polyrotaxanes for Organic Electronics: The Influence of the Counter CationsADVANCED FUNCTIONAL MATERIALS, Issue 23 2009Gianluca Latini No abstract is available for this article. [source] Synthesis and Electro-Optical Properties of a Novel DNA,Lipid Complex Carrying Carbazole MoietiesMACROMOLECULAR CHEMISTRY AND PHYSICS, Issue 3 2010Jinqing Qu Abstract A novel DNA,lipid complex carrying carbazole (Cz) moieties was prepared by substituting the sodium counter cation with cationic lipid, namely lipid(2Cz), in which the actual mole ratio of phosphate to lipid was 1:1.05. The DNA,lipid(2Cz) complex was soluble in common organic solvents including CHCl3, CH2Cl2, methanol, and ethanol, while insoluble in THF, toluene, and water. CD spectroscopy revealed that the DNA,lipid complex took a predominantly double helical structure in methanol and that the helical structure was fairly stable against heating. A solution of the DNA,lipid(2Cz) complex emitted fluorescence in 40.0% quantum yield, which was lower than that of the corresponding lipid(2Cz) (76%). The cyclic voltammograms of the complex indicated that the oxidation potential of DNA,lipid(2Cz) was 0.65,V. The onset temperature of weight loss of the DNA,lipid complex is 230,°C according to TGA in air. [source] Synthesis and Properties of DNA Complexes Containing 2,2,6,6-Tetramethyl-1-piperidinoxy (TEMPO) Moieties as Organic Radical Battery MaterialsCHEMISTRY - A EUROPEAN JOURNAL, Issue 11 2008Jinqing Qu Dr. Abstract We report here the first example of organic radical battery with DNA. Though there is a growing interest in DNA/cationic-lipid complexes as promising gene delivery vehicles, few efforts have been focused on the use of such complexes as advanced materials for organic optoelectronic applications. The present article describes how substitution of the sodium counter cation of DNA with cationic amphiphilic lipid(1,4) provided novel DNA,lipid complexes that contain TEMPO radicals, in which the actual mole ratio of phosphate to lipid was 1:0.84 to 1:0.16. All the TEMPO-containing DNA,lipid complexes displayed reversible two-stage charge/discharge processes, the discharge capacities of which were 40.5,60.0,A,h,kg,1. In particular, the capacity of a DNA,lipid(3)-based cell reached 60.0,A,h,kg,1, which corresponds to 192,% relative to its theoretical value for the single-electron one-stage process, indicating a two-electron process. [source] Synthesis of networked polymers with lithium counter cations from a difunctional epoxide containing poly(ethylene glycol) and an epoxide monomer carrying a lithium sulfonate salt moietyJOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 14 2010Kozo Matsumoto Abstract Poly(ethylene glycol)-based networked polymers that had lithium sulfonate salt structures on the network were prepared by heating a mixture of poly(ethylene glycol) diglycidyl ether (PEGGE), poly(ethylene glycol) bis(3-aminopropyl) terminated (PEGBA), and an ionic epoxy monomer, lithium 3-glycidyloxypropanesulfonate (LiGPS). Flexible self-standing networked polymer films showed high thermal stability, low crystallinity, low glass transition temperature, and good mechanical strength. The materials were ion conductive at room temperature even under a dry condition, although the ionic conductivity was rather low (10,6 to 10,5 S/m). The ionic conductivity increased with the increase in temperature to above 1 × 10,4 S/m at 90 °C. The film samples became swollen by immersing in propylene carbonate (PC) or PC solution of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). The samples swollen in PC showed higher ionic conductivity (ca.1 × 10,3 S/m at room temperature), and the samples swollen in LiTFSI/PC showed much higher ionic conductivity (nearly 1 S/m at room temperature). © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 3113,3118, 2010 [source] | ||||||||||