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'Photoisomerization' in keywords
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2000 (1)
1980 (2)
1979 (1)
1Author    H. Parlar, F. KorteRequires cookie*
 Title      
 Abstract    Photokinetic experiments show that a series of chlorinated octahydro-1,4-endo, endo-5,8-dimethanonaphthaline (1-4) react intramole-cular and via tripletstate to their photoisomers (1 a-4a). The formation of the compounds 1 a-4a is dependent on oxygen and nature of sensitizers. 
  Reference    Z. Naturforsch. 35b, 1488—1490 (1980); eingegangen am 25. April 1980 
  Published    1980 
  Keywords    Cyclodiene Insecticides, Photoisomerization, Quantum Yields 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1488_n.pdf 
 Identifier    ZNB-1980-35b-1488_n 
 Volume    35 
2Author    Ivo Grabchev, Vladimir BojinovRequires cookie*
 Title    Photoisomerization of Triazine-stilbene Fluorescent Brighteners in Solution and in their Copolymers with Styrene  
 Abstract    The paper reports on the photochemical trans-cis isomerization of some new polymerizable triazine-stilbene fluorescent brighteners and their copolymers with styrene in aqueous and ethanol solutions. A dependence of trans-cis isomers in solution equilibrium and in solid polymeric films on the nature of the substituent in the triazine ring has been found. 
  Reference    Z. Naturforsch. 55a, 833—836 (2000); received June 13 2000 
  Published    2000 
  Keywords    Photoisomerization, Triazine-stilbene, Polymerizable Fluorescent Brighteners 
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 TEI-XML for    default:Reihe_A/55/ZNA-2000-55a-0833.pdf 
 Identifier    ZNA-2000-55a-0833 
 Volume    55 
3Author    Heinz Falk, Klaus ThirringRequires cookie*
 Title    Beiträge zur Chemie der Pyrrolpigmente, XXXIII [1] Darstellung, Struktur und Eigenschaften von isomeren N-Methyl-Bilatrienen-abc (N-Methyl-etiobiliverdine-IV-y) On the Chemistry of Pyrrole Pigments, XXXIII [1] Synthesis, Structure and Properties of Isomeric N-Methyl-bilatrienes-abc (N-Methyl-etiobiliverdines-IV-y)  
 Abstract    Methylation of etiobiliverdin-IV-y yields a ring-A N-methylated product the structure of which was proven by comparison with the corresponding monolactimether and the ring-B methylated product which was synthesized on an independent route. The configura-tion (Z,Z,Z) was deduced by iH-NMR experiments and a more or less helical conformation which is most twisted at the ring-A methine fragment was found. Photoisomerization exclusively takes place at this position giving the (E,Z,Z) diastereomer, a reaction which is discussed in terms of the correlation of light absorption, methine single bond twist and photochemical selectivity. 
  Reference    Z. Naturforsch. 34b, 1448—1453 (1979); eingegangen am 25. Mai 1979 
  Published    1979 
  Keywords    UY-VIS, iH-NMR, Photoisomerization, Configuration, Conformation 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-1448.pdf 
 Identifier    ZNB-1979-34b-1448 
 Volume    34 
4Author    J. Schmitzer, K. Hustert, H. Parlar, F. KörteRequires cookie*
 Title    Zur Struktur von verbrückten Photoisomeren der Cyclodieninsektizide Structure of Bridged Photoisomers of Cyclodiene Insecticides  
 Abstract    Asymmetrically substituted chlorinated tetrahydro-4,7-methano-lH-indanes can be bridged photochemically into two types of isomerization products. These photoisomers can be distinguished on the basis of different geminal coupling constants in their X H NMR spectra. The structural assignment is not always certain, given only one photoisomer; it is unambiguous when both isomers are available. 
  Reference    Z. Naturforsch. 35b, 502—506 (1980); eingegangen am 10. Dezember 1979 
  Published    1980 
  Keywords    Cyclodiene Insecticides, Photoisomerization, X H NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0502.pdf 
 Identifier    ZNB-1980-35b-0502 
 Volume    35