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  • 1
    Electronic Resource
    Electronic Resource
    Low frequency modes of surface adsorbed dye molecules studied by optical high resolution techniques (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 1944-1945 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We observed for the first time in an optical high resolution experiment (fluorescence line narrowing) the coupling of low frequency adsorbate motions to vibronic bands of the electronic transition of quinizarin adsorbed on γ-alumina. These motions may provide an important dephasing mechanism for the electronic excitation of absorbed molecules. The increased hole width of adsorbed dyes which is several times larger than in amorphous hosts is thought to be caused by these low frequency modes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457052
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Detection and spectroscopy of single pentacene molecules in a p-terphenyl crystal by means of fluorescence excitation (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 7150-7163 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Recent advances in fluorescence excitation spectroscopy with high efficiency have produced greatly improved optical spectra for the first electronic transition of individual single molecules of pentacene in p-terphenyl crystals at low temperatures (1.5 to 10 K). Two classes of single molecule behavior are observed: class I molecules have time-independent resonance frequencies, and class II molecules show a diffusive motion among several resonant frequencies with time which we term "spectral diffusion'' by analogy with a similar effect which is common in amorphous materials. The temperature dependence of the linewidth and the power dependence of the fluorescence emission rate and of the linewidth are reported and analyzed. Various forms of the surprising class II behavior are described, including jumping among several discrete frequencies, creeping toward the center of the inhomogeneous line in many small steps, and a wandering among many possible resonance frequencies. The occurrence of class II behavior is restricted to the wings of the inhomogeneous line suggesting that the effect is correlated with some form of local disorder. The spectral diffusion rate increases with increasing temperature, suggesting that the effect may be due to phonon-assisted transitions of local degrees of freedom around the pentacene defect whose source remains to be identified conclusively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461392
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Measurement of Optical Dephasing of a Single Terrylene Molecule with Nanosecond Time Resolution (1995)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 17078-17081 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100047a005
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  • 4
    Electronic Resource
    Electronic Resource
    Optical Spectroscopy and Spectral Diffusion of Single Dye Molecules in Amorphous Spin-Coated Polymer Films (1994)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 6671-6674 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100078a003
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  • 5
    Electronic Resource
    Electronic Resource
    Single-molecule optical switching of terrylene in p -terphenyl (1997)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 387 (1997), S. 688-691 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The controlled manipulation and switching of single atoms and molecules raise the prospect of ultra-high-density data storage. Switching by motion of a single atom has been reported, and techniques of single-molecule optical detection and spectroscopy in the condensed phase have been refined to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/387688a0
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  • 6
    Electronic Resource
    Electronic Resource
    Absorption, excitation, and emission spectroscopy of terrylene in p-terphenyl: Bulk measurements and single molecule studies (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 107 (1997), S. 7673-7684 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: This paper reports spectroscopic investigations of the chromophore terrylene embedded in a matrix of crystalline p-terphenyl. While this system is particularly well suited for single molecule spectroscopy, little is known about the guest site configuration of terrylene. To shed some light on this issue, we employed absorption and fluorescence spectroscopy and compared the experimental data to the results of theoretical calculations. Based on this comparison we suggest a substitution scheme which is in agreement with all the spectroscopic evidence. The dispersed fluorescence spectra of single molecules in the wings of the inhomogeneous distribution deviate significantly from the bulk spectra. This observation is discussed in terms of a host-induced change of the structure and a possible 13C isotopic substitution of the chromophores. Finally we investigated the dynamic host–guest interactions via the temperature-dependent shift and broadening of single molecule excitation lines and found these processes dominated by coupling to characteristic pseudolocal phonon modes of the host, although chromophores in the wings of the inhomogeneous distribution exhibit additional contributions which we attribute to thermal matrix expansion. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.475107
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  • 7
    Electronic Resource
    Electronic Resource
    Optical modification of a single impurity molecule in a solid (1992)
    [s.l.] : Nature Publishing Group
    Nature 355 (1992), S. 335-337 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Samples were prepared by predissolving zone-refined perylene in acetone, mixing with low-density poly(ethylene) (PE) powder (^25% crystallinity), drying at 323 K for 30 min under high vacuum, pressing films at 413-423 K between glass slides, and quenching to 77 K for 1 min. The ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/355335a0
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  • 8
    Electronic Resource
    Electronic Resource
    Direct spectroscopic observation of quantum jumps of a single molecule (1995)
    [s.l.] : Nature Publishing Group
    Nature 373 (1995), S. 132-134 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Crystals of terrylene (C30H16, a higher homologue of perylene) in /?-terphenyl were grown by sublimation from a mixture of the two compounds. The crystals were mounted in a cryostat (1.4 K) at the joint focus of a lens and a paraboloid which served as an efficient collector of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/373132a0
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