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  • 1
    Electronic Resource
    Electronic Resource
    Photoassisted catalytic dissociation of water and reduction of nitrogen to ammonia on partially reduced ferric oxide (1987)
    s.l. : American Chemical Society
    Langmuir 3 (1987), S. 303-304 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00074a028
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Activated nitriles in heterocyclic synthesis: Synthesis of several new coumarin derivatives (1982)
    Springer
    Monatshefte für Chemie 113 (1982), S. 985-991 
    Details
    ISSN: 1434-4475
    Keywords: Benzopyrano[2,3-c]pyridines ; Enamino nitriles ; Iminocoumarins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Einige neue Benzopyran- und Benzopyranopyridin-derivate wurden durch Kondensation von 2-Amino-1,1,3-tricyanopropen (1) und 2-Amino-1-cyanopropen-1,3-dicarbonsäuredimethylester (2) mit Salicylaldehyd und Behandlung der Reaktionsprodukte mit aktiven Methylenreagenzien dargestellt. Die spektroskopischen Daten der neuen Verbindungen werden diskutiert.
    Notes: Abstract Several new benzopyran and benzopyranopyridine derivatives were synthesized via condensation of 2-amino-1,1,3-tricyanopropene (1) and diethyl 2-amino-1-cyanopropene-1,3-dicarboxylate (2) with salicylaldehyde and treatment of the resulted products with active methylene regents. The spectroscopic data of the synthesized compounds are reported and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00799239
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  • 3
    Electronic Resource
    Electronic Resource
    Photoelectrochemical characteristics of ferric tungstate (1998)
    Springer
    Journal of solid state electrochemistry 2 (1998), S. 170-175 
    Details
    ISSN: 1433-0768
    Keywords: Key words Photoelectrochemical ; Ferric tungstate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Active ferric tungstate was prepared by fusing an equimolar mixture of tungsten oxide and ferric oxide at 1100 °C and annealing at 800 °C for 20 h. Analysis of the electrode material by X-ray diffraction showed that its composition was Fe2WO6. When this material was illuminated by visible light in 0.1 M NaOH solution, an anodic photocurrent at a positive potential of 0.5 V (SCE) was obtained. Therefore, this material is considered as an n-type semiconductor. The d.c. conductivity of this material at 25 °C was 4 × 10−6 Ω−1 cm−1. In the dark, unexpectedly high anodic currents were observed at positive potentials of 0.8 V (SCE) in 0.1 M NaOH. These currents are attributed to the existence of a high density of electron-hole recombination centers within the band-gap of ferric tungstate. When dimethyl viologen (DMV) was used as an electroactive compound in the electrolyte, the anodic photocurrents increased significantly. The oxidation of DMV is thus expected to compete with the electron-hole recombination process. Furthermore, the process of electron-hole recombination was also predicted from the shape of the photocurrent transients under interrupted illumination. These transients exhibited first-order relaxation effects in the region of the onset time of the photocurrents. The band-gap energy of Fe2WO6 was found to be about 1.5 eV and its flat-band potential in 0.1 M NaOH was about −0.3 V (SCE). The photoelectrochemical properties of ferric tungstate are explained according to the formalism of the band model of the semiconductor/electrolyte interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100080050083
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    Paper (German National Licenses)
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