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  • 1
    Electronic Resource
    Electronic Resource
    The reaction of O(1D) with H2O, D2O monomers and clusters and the intracomplex reaction in N2O–X2O (X=H,D) photo-initiated at 193 and 212.8 nm (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 111 (1999), S. 4025-4031 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The reaction of O(1D) with water and water clusters was re-examined. We monitored the nascent product state distributions in the reaction photo-initiated by the dissociation of N2O at 193 and 212.8 nm, and the corresponding photo-initiated intracluster reaction. The study at two different dissociation wavelengths and the use of D2O allowed us to obtain direct information on the effect of initial collision kinetic energy on the energy distribution in the product. Based on the new results obtained we conclude that the reaction of O(1D) with water occurs through abstraction mechanism with a relatively short lived collision complex. In the case of the intracluster reaction, we have indication that more internal energy is deposited in the N2 moiety, compared to the dissociation of an isolated N2O. In addition the results indicate that the reaction between the oxygen atom and the water in the complex involved the formation of a short lived collision complex, with a lifetime of probably only few rotations of OH. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.479704
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  • 2
    Electronic Resource
    Electronic Resource
    Production of OH by dissociating ozone–water complexes at 266 and 355 nm and by reacting O(1D) with water dimers (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 102 (1995), S. 1941-1943 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: In the present study the production of OH was monitored when ozone water complexes were dissociated at 266 and 355 nm and when O(1D) atoms were reacted with water dimers. The results indicate that the absorption of ozone at 355 nm is enhanced by two orders of magnitude when the ozone is complexed with water. In addition it is shown that the rotational energy distribution of the OH product is very similar when it is produced in an intracluster process, or by reaction of O(1D) with water dimers. The results are rationalized by complex induced potential energy surfaces shift. The shifts may strongly depend on the relative conformation of the water and the ozone in the complex. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468760
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  • 3
    Electronic Resource
    Electronic Resource
    The role of three dimensional structure in electron transmission through thin organic layers (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 107 (1997), S. 1288-1290 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: In this work we probe the effect of the three dimensional structure of the medium on the efficiency of electron transmission (ET) through it, and demonstrate that all three dimensions are playing a crucial role in the ET through thin films. By producing Langmuir–Blodgett layers from two type of amphiphiles we could vary the order in the plane perpendicular to the direction of electron propagation. It was found that the order in this plane affects the low energy electron transmission efficiency. The results are explained by the long wavelength associated with the low energy electrons. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.474476
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  • 4
    Electronic Resource
    Electronic Resource
    Reactivity induced by complex formation: The reaction of O(3P) with HCl dimers (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 2627-2633 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The reaction of O(3P) with HCl⋅M (M=HCl, Ar) complexes has been studied. While the monomer HCl, in its ground vibrational state, reacts extremely slow with O(3P), it is shown here that the van der Waals complexes react with an efficiency of about 3 orders of magnitude larger than that of the monomer. The reactivity of DCl, on the other hand, is not enhanced by the complex formation. Molecular dynamics simulation indicates that the collision complex lifetime increases by several orders of magnitude due to the existence of the "third body" in the cluster. A model for explaining the complex induced enhancement of reactivity is presented and is supported by ab initio calculations. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.473411
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  • 5
    Electronic Resource
    Electronic Resource
    Electron transmission through organized organic thin films studied by discrete initial electron kinetic energies (1999)
    Springer
    The European physical journal 8 (1999), S. 445-451 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 79.60.Dp Adsorbed layers and thin films - 73.20.At Surface states, band structure, electron density of states - 73.61.Ph Polymers; organic compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Synchrotron radiation (SR) pulses are used to eject electrons from a gold substrate covered with organized organic thin films (OOTF) in order to investigate their transmission probability through the OOTF as a function of the electron initial kinetic energy. By variation of the SR photon energy within a few eV above the Au-4f binding energy levels we controlled the initial kinetic energy of the substrate electrons. The observed oscillations in the transmission probability for porphyrin-based films as a function of the kinetic energy is argued to be due to effects of band structure above the vacuum level in the well-ordered molecular adsorbate. We also present valence photoemission spectra (PES) of different type OOTF and demonstrate how their coverage of the substrate affects the PES.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100510050711
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  • 6
    Electronic Resource
    Electronic Resource
    Electron Transmission Through Thin Organized Organic Films (1997)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 25 (1997), S. 71-75 
    Details
    ISSN: 0142-2421
    Keywords: photoelectron ; film ; scattering ; energy distribution ; band structure ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The interaction between electrons and organized organic thin films was investigated by measuring the energy distribution of photoelectrons injected from a thin silver film coated with thin organic layers. Electrons with energy above ∽0.8 eV were transmitted ballistically through an organic layer that contains up to five monolayers, each ∽2 nm thick. Elastic scattering processes contribute significantly to the electron energy distribution only for thicker layers. The transmission of low-energy electrons is controlled mainly by an electrostatic barrier perpendicular to the surface. A signature of a band structure in the organic layer was observed when the electrons were transmitted through 13 layers. © 1997 by John Wiley & Sons, Ltd.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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