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  • cis-trans Isomerization
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1999 (1999), S. 2117-2119 
    ISSN: 1434-1948
    Keywords: Spin crossover ; Light-induced spin change ; cis-trans Isomerization ; Visible light irradiation ; Iron(III) ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An iron(III) complex [Fe(salten)(Mepepy)]BPh4 containing only one photoisomerizable ligand (Mepepy) has been synthesized, it exhibits a thermally-induced spin crossover in the solid state and in solution {H2salten = 4-azaheptamethylene-1,7-bis(salicylideneiminate); Mepepy = 1-(pyridin-4-yl)-2-(N-methylpyrrol-2-yl)ethene}. The photoisomerizations of both the free and coordinated Mepepy ligand have been observed at room temperature with visible-light irradiation and monitored by UV/Vis and 1H NMR spectrometries. trans-to-cis isomerization of only one photosensitive ligand in the iron(III) complex is sufficient to detect a partial spin change of the iron(III) ion. This photoinduced spin change is seen for the first time from a high-spin state to a low-spin state.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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