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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and properties of an ω,ω′-appended eighteen carbon chains hypericin derivative (1996)
    Springer
    Monatshefte für Chemie 127 (1996), S. 717-723 
    Details
    ISSN: 1434-4475
    Keywords: Hypericin derivative ; Synthesis ; NMR spectroscopy ; Absorption spectra ; Fluoresence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein in den Positionen ω,ω′ mit zwei C18-Ketten substituiertes Derivat des Hypericins (2) wurde ausgehend von Emodin synthetisiert. Die Gesamtausbeute der siebenstufigen Synthese betrug 12%. Die1H- und13C-NMR, absorptions- und emissionsspektroskopischen Eigenschaften wurden gemessen;2 kann sogar in apolaren Lösungsmitteln und Polyethylen gelöst werden.
    Notes: Summary An ω,ω′-appended eighteen carbon chains hypercin derivative (2) was synthesized starting from emodin. The overall yield of the seven step synthesis was 12%. The1H and13C NMR, absorption, and emission spectroscopic properties were measured;2 can be dissolved even in apolar solvents and polyethylene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00817262
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  • 2
    Electronic Resource
    Electronic Resource
    Structural aspects and electronic absorption of the hydroxyphenanthroperylene quinones fringelit D, hypericin, and stentorin (1996)
    Springer
    Monatshefte für Chemie 127 (1996), S. 659-668 
    Details
    ISSN: 1434-4475
    Keywords: Fringelite ; Stentorin ; Hypericin derivative ; Absorption spectra ; PPP-calculations ; Polarization spectra ; Deprotonation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Semiempirische quantenchemische Rechnungen (PPP-Typ) der Absorptions-spektren von Hypericin, Fringelit D, Stentorin und ihrer Konformeren, Tautomeren und deren Deprotonierungsprodukten wurden durchgeführt. Die Resultate stehen in Einklang mit den experimentellen Absorptionsspektren von Hypericin, Fringelit D, Stentorin, ihrer Deprotonierungsprodukte und dem polarisierten Absorptionsspektrum eines in gestrecktem Polyethylen eingebetteten ω,ω′-substituierten Hypericinderivates.
    Notes: Summary PPP type semiempirical quantum chemical calculations of absorption spectra were performed for hypericin, fringelit D, stentorin, and their respective conformers, tautomers, and deprotonated species. The results agree with the experimental absorption spectra of hypericin, stentorin, and fringelit D, their deprotonated species, and the polarized absorption spectra of an ω,ω′-long chain appended hypericin derivative embedded in stretched polyethylene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00817257
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    Paper (German National Licenses)
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