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  • 1
    Electronic Resource
    Electronic Resource
    Deuteron NMR study of benzene-d6 in a liquid-crystalline polysiloxane (1991)
    s.l. : American Chemical Society
    Macromolecules 24 (1991), S. 5040-5045 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00018a009
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  • 2
    Electronic Resource
    Electronic Resource
    Phasentransferkatalysierte Wittig-Reaktionen ohne Basenzusatz (1979)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 2342-2346 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Basefree Wittig Reactions with Phase Transfer CatalytsKetones like trifluoroacetyl compounds  -  giving the haloform reaction in basic solutions  -  are able to react with mono or bis phosphonium fluorides without bases via Wittig reactions with very good yields. The phosphonium fluorides are prepared very easily from other phosphonium halides under phase transfer catalysis of crown ethers. The ratio of the stereoisomeric alkenes in the product and the spectra of the trans- respectively trans-trans alkenes are given.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19791120642
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  • 3
    Electronic Resource
    Electronic Resource
    Synthese, thermostabilität und elektrische eigenschaften von tiefgefärbten polymeren mit anellierten phthalocyaninartigen systemen (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 154 (1972), S. 111-120 
    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: 2.5-Diamino-3.4-dicyanothiophene reacted with terephthalic aciddichloride to a polyamide and with thiophene-2.5-dicarboxaldehyde to a polyazomethine. A phthalocyanine analogous system could be built up on both polymers by the reaction with phthalodinitrile and copper acetylacetonate. This increased the thermal stability of the polymers. A new measurement cell was used to measure the electrical conductivity of the polymers. This cell is constructed to measure in any gas atmosphere or in a vacuum at pressures up to 5000 kp · cm-2 and at temperatures up to 150°C.
    Notes: 2.5-Diamino-3.4-dicyanthiophen wurde mit Terephthalsäuredichlorid zu einem Polyamid und mit Thiophen-2.5-dicarbaldehyd zu einem Polyazomethin umgesetzt. An beide Polymere konnte durch Reaktion mit Phthalodinitril und Kupferacetylacetonat ein phthalocyaninartiges System anelliert werden. Durch diese Anellierung wurde die thermische Stabilität der Polymeren gesteigert. Die elektrische Leitfähigkeit der beschriebenen Polymeren wurde mit einer neuen Meßzelle gemessen, die die Messung in jeder beliebigen Atmosphäre oder im Vakuum bei Drücken bis zu 5000 kp · cm-2 und bei Temperaturen bis zu 150°C gestattet.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021540110
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  • 4
    Electronic Resource
    Electronic Resource
    Die anwendung von redoxharzen in der anorganischen chemieHerrn Prof. Dr. Dr. h. c. A. STEINHOFER zum 60. Geburtstag gewidmet (1968)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 2 (1968), S. 86-98 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Ag, Cu, Te and Se were precipitated from aqueous solutions by a redox resin containing the system anthraquinone/anthrahydroquinone. Ag, Cu and Te were dissolved in 1 N nitric acid. Se was dissolved in a solution of KCN. This resin was able to alter the valences of variable-valence ions (UO22+ → U4+; VO2-2 → V3+). It was possible to produce H2O2 solutions up to a concentration of 1.3 N in a continuous process with a resin made by condensation of hydroquinone and phenol with formaldehyde.
    Notes: Ein das Anthrachinon-Anthrahydrochinon-System enthaltendes Redoxharz wurde zur Abscheidung von Ag, Cu, Te und Se aus wäßriger Lösung eingesetzt. Ag, Cu und Te wurden in 1 n HNO3 und Se in KCN-Lösung gelöst. Mit diesem Harz wurden auch Ionenumladungen (UO2+2 → V4+ und VO-2 → V3+) vorgenommen. Mit einem Kondensationsharz aus Hydrochinon, Phenol und Formaldehyd konnten in einem kontinuierlichen Verfahren bis zu 1,3 n H2O2-Lösungen hergestellt werden.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1968.050020107
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  • 5
    Electronic Resource
    Electronic Resource
    Die Anwendung von Redoxharzen in der organischen Chemie (1969)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 6 (1969), S. 89-100 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: This publication relates to examples of the application of redox resins in organic chemistry. These redox resins contain various quinone/hydroquinone systems. p-Benzoquinone was reduced to hydroquinone and some hydrogenated aromatic and heterocyclic compounds were dehydrogenated to the corresponding aromatic and heterocyclic parent compounds by redox resins. Following the STRECKER degradation α-aminocarboxylic acids were degraded to the corresponding aldehydes having one C-atom less than the α-aminocarboxylic acid. Redox resins can be used as antioxydants as has been shown in the synthesis of 3-acetoindole.
    Notes: Es wird über Anwendungsbeispiele für Redoxharze in der organischen Chemie berichtet, die als Redoxsysteme verschiedene Chinon-Hydrochinon-Systeme enthalten. p-Benzochinon läßt sich zu Hydrochinon reduzieren. Hydroaromaten und Hydroheterocyclen können durch Redoxharze zu den entsprechenden Aromaten bzw. Heterocyclen dehydriert werden. Entsprechend dem STRECKERschen Abbau lassen sich α-Aminocarbonsäuren durch Redoxharze zu dem um ein C-Atom ärmeren Aldehyd abbauen. Anhand der 3-Acetylindoldarstellung wird gezeigt, daß ein Redoxharz als Antioxydans eingestzt werden kann.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1969.050060108
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  • 6
    Electronic Resource
    Electronic Resource
    Struktur und elektrische Leitfähigkeit von polymeren organischen Halbleitern (1973)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 29 (1973), S. 307-347 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: In this review article we want to give information about low molecular and polymer organic semiconductors, which were recently synthesized in our institute.Specific electric conductivities up to σ298°K = 9.0 · 10-5Ω-1 · cm-1 and thermic activation energies of E = 0.30 eV of polyenearylenes, respectively -heteroarylenes were measured.Polyazomethines have a maximum σ298°K = 3.3 · 10-9Ω-1 · cm-1 and E = 0.35 eV. Polymers with indophenine units have conductivities up to σ298°K = 1.1 · 10-4Ω-1 · cm-1 and E = 0.39 eV. A maximum of σ298°K = 5.0 · 10-2Ω-1 · cm-1 and E = 0.05 eV was found for bis-(1.2-dicyanoethylenedithiolo)-metal salts.Polymers with a phthalocyanine- or hemiporphyrazine-like structure achieve a conductivity of σ298°K = 2.3 · 10-2Ω-1 · cm-1 and E = 0.15eV. Coordination polymers of dimercaptomaleic acid, respectively their monoamide show a maximum of σ298°K = 3.2 · l0-lΩ-l · cm-1 and E = 0.20 ev. Polymers with σ298°K ≤1.5 · 10-5 Ω-l · cm-l and E ≥ 0.5 eV were obtained by the polymerization of succinonitrile.All the investigated substances show an electronic conductivity. The existence of an ionic conductivity could, in all cases, be excluded by using direct current measurements over a long period of time.
    Notes: In der folgenden zusammenfassenden Darstellung wird über niedermolekulare und polymere organische Halbleiter berichtet, die in letzter Zeit in unserem Institut synthetisiert wurden.Bei den Polyenarylenen bzw.-heteroarylenen werden spezifische elektrische Leitfähigkeiten bis zu σ298°K = 9,0 · 10-5Ω-1 · cm-1 bei einer thermischen Aktivierungsenergie E = 0,30 eV gemessen. Polyazomethine besitzen maximal σ298°K = 3,3 · 10-9Ω-1 · cm-1 bei E = 0,35 eV. Polymere mit Indophenineinheiten haben bis zu σ298°K = 1,1 · 10-4Ω-1 · cm-1 bei E = 0,39 eV. Bei Bis-(1,2-dicyanäthylendithiolo)-metallsalzen wird maximal σ298°K = 5,0 · 10-2Ω-1 · cm-1 bei E = 0,05 eV gefunden. Polymere mit einer phthalocyaninartigen oder hemiporphyrazinartigen Struktur erreichen σ298°K = 2,3 · 10-2Ω-1 · cm-1 bei E = 0,15 eV. Koordinationspolymere aus Dimercaptomaleinsäure bzw. ihrem Monoamid weisen maximal σ298°K = 3,2 · 10-1Ω-1 · cm-1 bei E = 0,20 eV auf. Bei der Polymerisation von Bernsteinsäuredinitril wurden Polymere mit σ298°K≤ 1,5 · 10-5Ω-1 · cm-1 bei E≥0,5 eV erhalten.Alle untersuchten Verbindungen weisen eine elektronische Leitfähigkeit auf. Das Vorhandensein einer Ionenleitfähigkeit konnte in allen Fällen auf Grund von Gleichstromdauermessungen ausgeschlossen werden.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1973.050290116
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  • 7
    Electronic Resource
    Electronic Resource
    Reactive groups on polymer coated electrodes, 8. Novel conducting polymer interfaces produced by electrochemical copolymerization of functionalized thiophene activated esters with 3-methylthiophene (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2255-2266 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: With the synthesis of two new functionalized thiophene activated esters and their electrocopolymerization with 3-methylthiophene, two types of redox active polymers have been prepared. FTIR studies of the resultant polymers reveal that both types of activated ester groups withstand the applied electrooxidative conditions and are correctly integrated into the corresponding polymers. The electrocopolymerization experiments show that the composition of the obtained polymers strongly depends on the ratio of the components in the reaction medium. With the increase of the ratios of pentafluorophenyl thiophene-3-acetate-3-methylthiophene or succinimido thiophene-3-acetate/3-methylthiophene, a higher concentration of functionalized thiophene units is incorporated into the polymer chains. The measurement of the conductivity on these polymeric films gave a value in the range of 10-3 to 10-2 S · cm-1, which is comparable to that of the unsubstituted polythiophene and consistent with the conjugation grade suggested by electrochemical and UV-vis spectroscopic data. As expected, the pendant reactive ester groups on the electrode surfaces react rapidly with different amino compounds without loss of the electroactivity of the polymers. Therefore, these novel polymeric materials can be used as electrode interfaces for further functionalizations, especially for the immobilization of amines, peptides, and enzymes.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Synthesis and electropolymerization of new p-nitrophenyl-functionalized thiophene derivatives (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 2737-2746 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Electrooxidative polymerization of three new p-nitrophenyl-functionalized thiophene derivatives leads to materials which show the electroactivities of both nitrobenzene and polythiophene. However, other than the reversible redox transition in solution, the nitro groups exhibit a complex nature of the cyclic voltammetric curve in the obtained solid polymeric films. It was found that the electrochemical behavior of the nitro groups has a dramatic effect on the conjugated π-electron systems of the substituted polythiophenes. Upon electrochemical addressing of the nitro groups the electroactivities of the corresponding polymers decrease rapidly compared to their analogous polymers without nitro groups. FTIR studies of these polymers revealed that after the reduction/oxidation process of the nitro groups still a large amount of electrolyte salt remains in the polymer films. As typical of functionalized polythiophenes, however, these new polymers can be switched under controlled conditions between their oxidized and neutral forms and exhibit the typical properties of electroactive polythiophenes, e.g., electrochromism.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Synthese, Charakterisierung und Halbleitereigenschaften eines polymeren Indopheninhomologen (1975)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 176 (1975), S. 333-340 
    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: Condensation of 2,3,7,8-tetraoxo-2,3,7,8-tetrahydropyrrolo[2′,3′:1,2]naphtho[5,6-b]-pyrrol (4) with thiopene yields a polymeric indophenine homologue (2), which is a vat dye. 2 has a coplanar conjugated π-electron system and the typical properties of a polymeric organic semiconductor of the p-type with a specific electrical conductivity of σ298K=1,8.10-5 Ω-1 cm-1 and a thermal activation energy of E=0,34eV(≈0,54.10-19J) at a pressure of p=1500kp cm-2 (14700 N cm-2). 2 has a specific concentration of unpaired spins of 5,6.1019 spins g-1.
    Notes: Durch Kondensation von 2,3,7,8-Tetraoxo-2,3,7,8-tetrahydropyrrolo[2′,3′:1,2]naphtho[5,6-b] pyrrol (4) mit Thiophen entsteht ein polymeres Indopheninhomologes (2). 2 ist ein Küpenfarbstoff und besitzt auf Grund seines koplanaren konjugierten π-Elektronensystems ausgeprägte Eigenschaften eines polymeren organischen Halbleiters. Es ist ein p-Leiter mit einer spezifischen elektrischen Leitfähigkeit von σ298k=1,8.10-5 Ω-1 cm-1 bei einer thermischen Aktivierungsenergie von E=0,34eV (≈0,54.10-19J), bei einem Druck von p=1500kp cm-2 (14700 N cm-2). 2 besitzt eine spezifische Spinkonzentration von 5.6.1019 spins g-1.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1975.021760207
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  • 10
    Electronic Resource
    Electronic Resource
    Synthese und halbleitereigenschaften von phthalocyaninartigen polymeren mit Tetrathiafulvalen-EinheitenHerrn Prof. Dr. Werner Schulze, Berlin, zum 65. Geburtstag gewidmet. (1977)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 178 (1977), S. 715-722 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: 4,5,4′,5′-Tetracyano-2,2′-bi-1,3-dithiolylidene (tetracyanotetrathiafulvalene) (1) was found to react with metal acetylacetonates (2a-m) to give dark, insoluble, and infusible polymers 3a-m with phthalocyaninelike structure. The electrical conductivity of the polymers was investigated (σ298K 〈 6·10-5 Ω-1 cm-1), and a linear relationship between the logarithm of the electrical conductivity and the activation energy of the different polymers was found (compensation effect). Measurements of the thermoelectric power proved p-conduction.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1977.021780308
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