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  • 1980-1984  (6)
  • 1981  (6)
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  • 1980-1984  (6)
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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and photochemical behavior of polynuclear dithiolato-metal-dye complexesDedicated to Prof. Dr. Georg Manecke of the Free University of Berlin for his 65th birthday (1981)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 182 (1981), S. 105-112 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polynuclear dithiolato-metal-dye complexes were prepared and their photochemical behaviors were studied. The dimercapto ligands used were maleonitriledithiol (MNT) and toluene-3,4-dithiol (TDT); metal ions were copper, manganese and nickel; and dyes were thionine (TH), tolusafranine (SAF) and methylene blue (MB). From IR spectra, elemental analyses and magnetic measurements they were found to be polynuclear complexes having bis(dithiolato)-metal structure incorporating the dyes as cations. The complexes showed almost the same visible spectra as the free dyes. The molar absorption coefficients of the maximum absorption were in most cases larger than in the free dye. The dithiolato-metal complex affected remarkably the photochemical reactivity of the dye incorporated in it. The rates of the photochemical reduction of the TH complexes (Cu-MNT-TH, Mn-MNT-TH and Cu-TDT-TH) in hexamethylphosphortriamide were higher than the free TH, while those of the SAF complexes (Cu-MNT-SAF and Mn-MNT-SAF) and MB complexes (Cu-MNT-MB and Ni-MNT-MB) were much lower than the free SAF and MB, respectively.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1981.021820113
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Solid phase photoreduction of methylviologen on cellulose (1981)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 182 (1981), S. 1111-1118 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Methylviologen (1,1′-dimethyl-4,4′-bipyridinium dichloride, MV2+) absorbed on cellulose paper can be reduced photochemically in solid phase. The ESR spectrum (singlet; g = 1,967, ΔHmsl = 13,5 gauss) shows the photochemical formation of its cation radical (MV•+). The MV•+ formed on cellulose is unusually stable against oxidation by oxygen. Photochemical formation and slow oxidation of MV•+ under air occur fairly reversibly. The concentration of MV•+ and the optical density (O.D.) at 620 nm show a linear relationship. The concentration of MV•+ at 1 O.D. corresponds to 1,07.10-8 spins/cm2 cellulose paper. The formation of carbonyl groups in MV2+/cellulose after irradiation indicates that cellulose acts as electron donor. The mechanism of the solid phase photoreduction is discussed in relation to the effect of other carbohydrates or inorganic materials as adsorbents.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1981.021820411
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Catalytic activity of polynuclear manganese-thiolato complexes for oxidative polymerization of 2,6-dimethylphenol (1981)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 182 (1981), S. 101-104 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Chelating thiolato-manganese complexes of 1,2-dimercaptoethane (DME), 3,4-dimercaptotoluene (DMT), cystein (Cys), β-mercaptoethyl alcohol (ME), β-mercaptoethylamine (MEA), and mercaptoacetic acid (MAA) showed high activity for the oxidative polymerization of 2,6-dimethylphenol (DMP) as heterogeneous catalysts. The complexes caused only C—O coupling to give poly[oxy(2,6-dimethyl-1,4-phenylene)] selectively. From the reaction in the absence of oxygen it was concluded that oxygen acts as electron-accepting ligand. The much higher activity of DMT complex, compared with that of DME complex, was considered to be due to the π-accepting character of the ligand. The MEA complex which showed especially strong spin-spin interaction in the ESR spectrum exhibited also high activity.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1981.021820112
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of new polynuclear manganese-thiolato complexes (1981)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 182 (1981), S. 89-99 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: New polynuclear manganese-thiolato complexes were prepared by reaction of Mn ions with chelating mercapto compounds, such as 1,2-dimercaptoethane (DME), 3,4-dimercaptotoluene (DMT), cystein (Cys), β-mercaptoethyl alcohol (ME), β-mercaptoethylamine (MEA), and mercaptoacetic acid (MAA). Potassium permanganate formed stable complexes with DME, DMT and Cys. The complexes of ME, MEA and MAA were prepared by the reaction with manganous chloride. The temperature dependencies of the magnetic susceptibility of the complexes, except Cys, obeyed the Curie-Weiss law, indicating strong antiferromagnetic interaction between the spins on the Mn ions. The valence of the DME and DMT complexes was calculated to be IV to V, and that of the Cys, ME, MEA and MAA complexes to be II to IV. ESR spectra of the DME and DMT complexes showed broad singlet absorptions, while those of ME, MEA and MAA complexes exhibited narrow Lorentzian singlets, both types indicating strong interaction between the spins. These results and the composition indicated polynuclear complexes containing μ-oxo (DME and DMT), μ-chloro or μ-thiolato (ME, MEA and MAA) structure, while Cys gave mononuclear complex.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1981.021820111
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Formation, characterization, and catalytic activities of polymer-metal complexes (1981)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science: Macromolecular Reviews 16 (1981), S. 397-522 
    Details
    ISSN: 0076-2083
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 49 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1981.230160107
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Rapid photoreduction of methylviologen sensitized by the tris(bipyridyl)ruthenium(II) complex bound to polystyrene beads with a spacer group (1981)
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 2 (1981), S. 621-626 
    Details
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/marc.1981.030020916
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    Paper (German National Licenses)
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