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  • Chemistry  (5)
  • binding ability
  • complex
  • ethyl viologen
  • 1975-1979  (5)
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Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 14 (1975), S. 353-362 
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Poly-β-1-naphthylmethyl-L-aspartate and copolymers of β-1-naphthylmethyl-L-aspartate and γ-benzyl-L-glutamate were prepared. From the results obtained by a study of infrared and circular dichroism spectra, poly-β-1-naphthylmethyl-L-aspartate was found to be a left-handed α-helix both in the solid state and in solution. The fluorescence spectra of these polymers showed excimer emission of the naphthyl chromophores and gave some information about the arrangement of the side-chain chromophores. By optical titration experiments, it was found that an increasing amount of β-1-naphthylmethyl-L-aspartate residues in the copolymers induces a progressive instability of the helical structure.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 177 (1976), S. 3495-3514 
    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-(1,3-Diisocyanato-1-propyl)phthalimid (5) wurde hergestellt, ausgehend von Glutaminsäure (1) über N-(Phthaloylglutaminsäure (2), N-(Phthaloylglutaminsäure-dichlorid 3), N-(Phthaloylglutaminsäure-diazid (4) mit anschließender Curtius-Umlagerung. Bei dieser zerfallen die Carbonylazid-Gruppen in 4-Stellung zur Phthalimido-Gruppe ab etwa 25°C während die anderen Carbonylazid-Gruppen in 2-Stellung zur Phthalimido-Gruppe bis etwa 45°C beständig sind. Das Diisocyanat 5 ist eine viskose Flüssigkeit, die ohne Racemisierung zu erleiden durch Molekulardestillation gereinigt werden kann. Eine Reihe von Polyharnstoffen (13a-i), Polyurethanen (15a-d) und das Polyharnstoffurethan) (17) wurde hergestellt, und ihre thermischen und Lösungs-Eigenschaften wurden untersucht. Alle geprüften Polymeren zersetzen sich zwischen 200 und 250°C.
    Notes: N-(1,3-Diisocyanato-1-propyl)phthalimide (5) was synthesized as a new monomer from glutamic acid (1) through N-phthaloylglutamic acid (2), N-phthaloylglutamoyl dichloride (3) and N-phthaloylglutamoyl diazide (4), followed by a Curtius rearrangement. In the Curtius rearrangement, the carbonylazido group with the phthalimido group in 4-position decomposes at 25°C, whereas the other carbonylazido group with the phthalimido group in 2-position is stable up to 45°C. The monomer is a viscous and transparent liquid which can be purified by molecular distillation without racemization. A series of polymers, including polyureas (13a-i), polyurethanes (15a-d) and a poly(urea-urethane) 17), were synthesized from monomer 5 and their thermal properties and solubilities were determined. It was found that all investigated polymers decompose readily between 200°C and 250°C.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 16 (1978), S. 635-638 
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 16 (1978), S. 539-543 
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 14 (1976), S. 521-529 
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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