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  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 4652-4658 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Nonphotochemical hole burning in glassy host/guest matrices generates a change of the site energy distribution of the guest molecules. This distribution of shifted energies has been determined by deconvoluting the difference of white-light excited fluorescence spectra before and after hole burning. For this aim, a special numeric algorithm has been developed. For the host/guest-system tetracene in ethanol, the observed shifts are within the inhomogeneously broadened line, but a shift to higher energies is predominant and amounts to about 20 wave numbers.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 320 (1985), S. 361-364 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Dank ihrer extrem hohen Photostabilität und hohen Fluorescenzquantenausbeute erwiesen sich die Perylenfarbstoffe als ideal für Markierungen bei sehr kleinen Konzentrationen und hohen Anregungsintensitäten. In fester Matrix wird bei 10 K eine Nachweisempfindlichkeit von 1 Farbstoffmolekül in 1014 Solvensmolekülen erreicht (4·10−18 mol). Durch eine Eichung mit den Raman-Linien der verwendeten Matrices läßt sich bei dieser Verdünnung eine Analysengenauigkeit von 5–10% erreichen. Durch Abwandlung der Perylenfarbstoffe sind Markierungen in wäßriger und organischer Phase möglich. Anwendungen in der Biochemie werden aufgezeigt.
    Notes: Summary Due to their high photostability and fluorescence quantum yield perylene dyes prove to be ideal labels for fluorescence measurements at extremely low concentrations and high excitation intensities. In solid solutions at 10 K a detection sensitivity of up to 1 dye molecule in 1014 solvent molecules (4 · 10−18 mol) is reached. Calibration with the Raman emission of the used matrix rises the precision of the analysis to 5–10% at this dilution. Modification of the perylene dyes allows labelling in aqueous and organic phases. Applications in biochemistry are discussed.
    Type of Medium: Electronic Resource
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