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  • 1
    Electronic Resource
    Electronic Resource
    Novel anion exchange membranes having fluorocarbon backbone: Preparation and stability (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 32 (1986), S. 4137-4143 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Anion exchange membranes with excellent durability were prepared by chemical modification of Nafion. The modification was achieved by transformation of the sulfonic acid group into quaternary ammonium group. Namely, Nafion membrane was first converted into an amide-type membrane. Reduction of the carbonxyl group to methylene followed by quaternarization with alkyl iodide resulted in the formation of an anion exchange membrane. The electric resistance of the resulting membranes depends on the equivalent weight of the starting membranes (4.4-6.0 Ω cm2 in 0.5N NaCl). The characteristics of the membranes are the excellent stability toward chemical substances such as organic solvents, oxidizing agents, acids, etc. For example, the membranes are stable in aqueous saturated chlorine solution at 60°C for 1000 hr.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1986.070320327
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis of poly(vinyl alcohol) combined with two kinds of nucleic acid bases and its optical behaviour (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 164 (1973), S. 345-347 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021640131
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  • 3
    Electronic Resource
    Electronic Resource
    Syntheses and condensation polymerizations of N-(2′,3′-dihydroxypropyl) derivatives of 5-halogenouracils, thymine, 6-methylthiopurine, and adenine 1-oxide (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 172 (1973), S. 19-25 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: 5-Chlor-1-(2′,3′-dihydroxypropyl)uracil (1a), 9-(2′,3′-Dihydroxypropyl)adenin-1-oxid (7), 9- und 3-(2′,3′-Dihydroxypropyl)-6-methylthiopurin (4) und (5) wurden dargestellt. Die Polykondensation dieser Verbindungen und anderer Nucleosidanaloga mit Phosphorsäure-phenylesterdichlorid sowie mit Dicarbonsäuren wurde untersucht. Alle so erhaltenen Oligomeren sind in Wasser löslich; ihre rel. mol. Massen liegen gemäß dampfdruckosmometrischer Bestimmungen zwischen 800 und 1500.
    Notes: 5-Chloro-1-(2′,3′-dihydroxypropyl)-uracil (1a), 9-(2′,3′-dihydroxypropyl)adenine-1-oxide (7), 9- and 3-(2′,3′-dihydroxypropyl)-6-methylthiopurine (4 and 5) were synthesized. Condensation polymerization of these compounds and other nucleoside analogues with phenoxy-phosphoryl dichloride or dicarboxylic acids were carried out. All obtained oligomers 9 and 11 are very soluble in water and were found to have rel. mol. masses between 800 and 1300 according to vapor pressure osmometry mesurements.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021720102
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis of poly(vinyl alcohol) with pending N-derivatives of nucleic acid bases (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 154 (1972), S. 263-269 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: N-(2-Dihydrogenphosphato)-äthyl-Derivate von Nucleinsäure-Basen und ihren Analoga wurden hergestellt und an Polyvinylalkohol geknüpft, und zwar mit Hilfe von N.N′-Dicyclohexylcarbodiimid als Kondensationsmittel in DMF/Wasser (9:1) unter Rückfluß. Adenin, Theophyllin, Hypoxanthin und Thymin wurden in Mengen von 12, 75, 52 und 68 Mol-% eingebaut (bezogen auf den Grundbaustein). Die erhaltenen Polymeren waren in Wasser sehr leicht löslich. Die Wechselwirkungen dieser Polymeren mit denaturierter DNA oder RNA wurden spektroskopisch untersucht. PVA-Thymidin z.B. zeigt in 0.1 m Na2HPO4-Puffer einen Hypochromieeffekt bis zu 16%.
    Notes: N-coupled (2-dihydrogenphosphato)-ethyl derivatives of nucleic acid bases and its analogues were synthesized and grafted onto poly(vinyl alcohol) using N.N′-dicyclohexylcarbodiimide as a dehydrating agent in refluxing dimethylformamide/water (9:1). (2-Dihydrogenphosphato)-ethyl derivatives of adenine, theophylline, hypoxanthine, and thymine were incorporated up to 12, 75, 52, and 68% with respect to the amount of hydroxy groups of poly(vinyl alcohol), respectively. White water-soluble products were obtained. Mixtures of poly(vinyl alcohol) having nucleicacid bases as side group and denatured yeast RNA or sperm DNA showed hypochromicity up to 16% in 0.1 M Na2HPO4 solution.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021540124
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  • 5
    Electronic Resource
    Electronic Resource
    Condensation polymers from 7-(2′.3′-dihydroxypropyl)-theophylline (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 164 (1973), S. 7-13 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: 7-(2′.3′-Dihydroxypropyl)-theophyllin-3′ -phosphat wurde aus dem 7-(2′.3′-Dihydroxypropyl)-theophyllin durch Phosphorylierung mit Phosphoroxychlorid in Dimethylphosphat als Lösungsmittel hergestellt. Durch dehydratisierende Kondensation mit N.N′-Dicyclohexylcarbodiimid wurden aus dieser Verbindung Oligomere erhalten. Die Gelchromatographie an Sephadex G-25 erbrachte vier Fraktionen; das Hauptprodukt hatte ein mittleres Molekulargewicht von über 1000. Ähnliche Oligomere wurden durch Kondensation von 7-(2′.3′-Dihydroxypropyl)-theophyllin mit Phosphorsäurephenylester-dichlorid erhalten.
    Notes: 7-(2′.3′-Dihydroxypropyl)-theophylline-3′-phosphate was synthesized using phosphorus oxychloride in trimethyl phosphate. This compound was condensed using N.N′-dicyclohexylcarbodiimide as a dehydrating agent in refluxing dimethylformamide to oligomeric products which were separated into four peaks by chromatography using Sephadex G-25. The major portion of the oligomeric product was found to have a molecular weight of more than 1000 according to gel-filtration measurement. An oligomeric product was also obtained from the polycondensation of 7-(2′.3′-dihydroxypropyl)-theophylline with phenoxyphosphoryl dichloride.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021640102
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  • 6
    Electronic Resource
    Electronic Resource
    Polyvinyl alcohol containing N-derivatives of cytosine, uracil, or adenosine-5′-phosphate as pendant groups (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 164 (1973), S. 15-23 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Polyvinylalkohole (P̄n ca. 500) mit Nukleinsäure-Basen, wie Adenosin-5′-phosphat, N-[(2′-Dihydrogenphosphato)-äthyl]-uracil und -cytosin, als Seitengruppen wurden dargestellt, und zwar mit Hilfe von DCC als Kondensationsmittel in DMF unter Rückfluß. Die erhaitenen Polymeren zeigten einen hypochromen Effekt (bis zu 4%) beim Mischen mit denaturierter DNA oder RNA in wäßriger Lösung. Polyvinylalkohol von niedrigem Polymerisationsgrad und mit Nukleotid-Analogen Basen als Seitengruppen (P̄n = 8) zeigte keinen Hypochromie-Effekt mit DNA oder RNA.
    Notes: Polyvinyl alcohols (P̄n ca. 500) having a nucleotide or one of its analogs, such as adenosine-5′-phosphate, N-[(2′-dihydrogenphosphato)ethyl]-uracil and -cytosine, as pendant group were synthesized by condensation using DCC as dehydrating agent in refluxing DMF. The resulting polyvinyl alcohols showed a hypochromic effect up to 4% when mixed with denaturated RNA or DNA in aqueous solution. Low molecular weight PVA (P̄n = 8) containing nucleotide analogs showed no hypochromic effect with DNA or RNA.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021640103
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  • 7
    Electronic Resource
    Electronic Resource
    Polycondensation of nucleotide analogues in the presence of imidazole (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 166 (1973), S. 15-21 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Oligomere von 3-(9-Adenyl)-2-hydroxypropylphosphat (I), 3-(3-Adenyl)-2-hydroxypropyl phosphate (II) und 3-(7-Theophillyl)-2-hydroxypropylphosphat (III) wurden durch Kondensation in siedendem DMF in Gegenwart von Imidazol oder Triäthylhydrochlorid dargestellt. Als Nebenprodukt entstanden N-(2,3-Dihydroxypropyl)-Derivate der entsprechenden Nukleinsäure-Basen. Die Oligomeren hatten höhere Molekulargewichte als jene, die durch Polykondensation mit N,N-Dicyclohexylcarbodiimid als Kondensationsmittel erhalten wurden.
    Notes: Oligomers of 3-(9-adenyl)-2-hydroxypropyl phosphate (I), 3-(3-adenyl)-2-hydroxypropyl phosphate (II) and 3-(7-theophillyl)-2-hydroxypropyl phosphate (III) were obtained by refluxing in DMF in the presence of imidazole or triethylamine hydrochloride. N-(2,3-Dihydroxypropyl) derivatives of the corresponding nucleic acid bases were formed as byproducts. The oligomers had higher molecular weights than those obtained by polycondensation using N,N-dicyclohexylcarbodiimide as dehydrating agent.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021660102
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  • 8
    Electronic Resource
    Electronic Resource
    Condensation polymerization of 3-(3-hypoxanthinyl)-and 3-(9-hypoxanthinyl)-1.2-propanediols (1971)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 148 (1971), S. 321-323 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1971.021480129
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  • 9
    Electronic Resource
    Electronic Resource
    Condensation polymerization of nucleotide analogues (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 154 (1972), S. 255-261 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: 3-(9-Adenyl)-, 3-(3-Adenyl)-, 3-(9-Hypoxanthyl)- und 3-(3-Hypoxanthyl)-2-hydroxypropyl-dihydrogenphosphat kondensieren in Gegenwart von überschüssigem N.N′-Dicyclohexylcarbodiimid. Die oligomeren Produkte sind in Wasser löslich, und die Hauptmenge hat ein Molekulargewicht von über 1000 (bestimmt durch Gel-Filtration). Mischungen von Oligomerem 3-(9-Adenyl)-2-hydroxypropylphosphat und RNA aus Hefe oder DNA aus Sperma zeigten einen Hypochromie-Effekt von 3%.
    Notes: 3-(9-Adenyl)-, 3-(3-adenyl)-, 3-(9-hypoxanthyl)- and 3-(3-hypoxanthyl)-2-hydroxypropyl dihydrogenphosphates were condensed in the presence of a large excess of N.N′-dicyclohexylcarbodiimide (DCC). The major part of the oligomeric products is soluble in water and has a molecular weight of more than 1000 according to gel-filtration measurement. The absorption spectra show 3% of hypochromism for mixtures of the oligo-3-(9-adenyl)-2-hydroxypropyl phosphate with denaturated yeast RNA or sperm DNA.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021540123
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