Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Time-resolved k(E*) measurements for dissociation of allyl iodide vibrationally excited via C–H overtones (v=6) (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 112 (2000), S. 6649-6655 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The direct time-resolved measurements of the energy dependent rate constant k(E*) have been carried out for dissociation of allyl iodide (AI) vibrationally excited via C–H overtones (v=6). Resonant two-photon ionization (R2PI) technique has been used for the detection of atomic iodine I(2P3/2) arising from the dissociation of photoexcited AI molecules. For R2PI detection a method with narrow-band vacuum ultraviolet radiation (VUV) was used. VUV radiation was generated by means of nonresonant frequency tripling of visible dye-laser radiation in gaseous xenon. Measured k(E*) values were found to be in excellent agreement with those calculated within the microcanonical version of the statistical Rice–Ramsperger–Kassel–Marcus theory in its "phase space" or "loose" transition state limit. The canonical version of the same model is also in good agreement with experimental data from the literature on the dissociation of allyl iodide under thermal heating conditions where collisional excitation takes place. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.481239
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Nanosecond and femtosecond probing of the dynamics of the UV-photodissociation of perfluoroethyliodide C2F5I (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 115 (2001), S. 11157-11165 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The ns photodissociation of perfluoroethyliodide C2F5I at 266 nm has been studied by using the resonant two-photon ionization (R2PI) technique. Recoil anisotropy parameters as well as average translational energy of the I atoms in the fine structure states 2P1/2 and 2P3/2 have been determined. The main contribution (99%) to the absorption at 266 nm was found to be caused by a parallel transition to the 3Q0 state which gives mainly excited-state atoms I(2P1/2). The ground-state atoms I(2P3/2) were found to appear mainly (88%) from the primarily excited 3Q0 state via curve-crossing 3Q0–1Q1 and to a lesser extent (12%) from direct absorption by a perpendicular transition to the 1Q1 and 3Q1 states. The fs pump–dump technique in combination with ns R2PI probing of the fragments I(2P1/2) and I(2P3/2) and time-of-flight mass spectrometry have been applied to probe the early stage dynamics of the C2F5I molecule on the excited state 3Q0 potential energy surface (PES). The evolution time of the excited molecule to the point where the energy gap between the excited state 3Q0 and the ground-state potential energy surfaces drops to a value of about 12 440 cm−1 was found to be 52±13 fs. This time corresponds to about 0.8 Å extension of the C–I bond distance. The molecular dynamics simulation with DFT calculated ground-state PES and 3Q0 PES with the shape calculated for methyl iodide found in the literature gives reasonable agreement with the experimental result for the evolution time. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1418743
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...