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  • 1
    Electronic Resource
    Electronic Resource
    Acid-base equilibrium in Excited State of 10-Methylacridone (1994)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 336 (1994), S. 425-428 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The acidity constants (pKa) in the ground, excited singlet and triplet state of 10-methylacridone have been studied in the 80% water and 20% ethanol sulfuric acid solutions. The pKa, pKa*(S) and pKa*(T) were determined to be -1.04 ±0.02, 1.10 ± 0.05 and 3.46 ± 0.10 at 23°C by means of the UV absorption, the fluorescence and the T-T absorption measurement in various acid concentrations.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19943360508
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Micropattern of GeO2/GeC lines prepared by UV irradiation and heat treatment of polygermane copolymers of methylphenylgermylene/phenylgermyne units (1997)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 11 (1997), S. 949-955 
    Details
    ISSN: 0268-2605
    Keywords: polygermane copolymers ; micropatterning ; photo-oxidation ; heat treatment ; Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Upon ultraviolet irradiation of polygermane copolymers of methylphenylgermylene/phenylgermyne units (PhMeGe)n(PhGe)m in air, the germanium-germanium bond in the copolymer film changed into a digermoxane chain. Laser flash photolysis of the copolymer film showed the intermediacy of polygermyl radicals generated by Ge-Ge bond homolysis. The XPS showed the formation of germanium carbide (GeC) and germanium dioxide (GeO2) upon heating the unirradiated and irradiated copolymer (PhMeGe)n(PhGe)m films, respectively. A relatively high-resolution micro- pattern of GeC/GeO2 was obtained by combining the photochemical and thermal properties of the copolymers of methylphenylgermylene/phenylgermyne units. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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