TITLE

Experimental study of the CO:O3 complex in argon matrices: Irradiation at 266 nm

AUTHOR(S)
Raducu, V.; Jasmin, D.; Dahoo, R.; Brosset, P.; Gauthier-Roy, B.; Abouaf-Marguin, L.
PUB. DATE
August 1994
SOURCE
Journal of Chemical Physics;8/1/1994, Vol. 101 Issue 3, p1878
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Codeposition of argon dilute samples of O3 and CO produced new narrow absorption lines which are assigned to the CO:O3 complex. One line appears at 2140.44 cm-1, 2 cm-1 above the CO frequency which shows that it is a weakly bonded complex. Its spectrum exhibits three new lines near the ν3 doublet of O3. The two lines observed at 1042.56 and 1043.37 cm-1 appear clearly at 5 K; the lowest frequency one, at 1041.35 cm-1, is overlapped at 5 K by the high frequency component of the ν3 doublet of isolated O3 and can only be detected when the temperature is raised, as it is almost not temperature dependent up to 20 K. Irradiation of the sample at 5 K with the 266 nm emission of a quadrupled ND-YAG laser leads to an efficient decomposition of free and complexed ozone and an increase of CO2 with two regimes, a fast beginning similar to the O3 and CO:O3 decays followed by a much slower one. After such an irradiation at 5 K, some recombination of O3 and CO:O3 is observed during a warming at 10 K. A careful analysis of the relative intensities variation shows that CO2 is only produced inside the CO:O3 complex, from the reaction of CO with 1D atomic oxygen. As 1D oxygen atoms are very fastly relaxed to 3P ones during their migration through the matrix, isolated CO does not react. We have shown evidence of a very limited migration of atomic oxygen at 5 K in solid argon, and of an efficient one at 10 K.
ACCESSION #
7610125

 

Related Articles

  • Matrix effects on the optical response of silver nanoclusters. Conus, F.; Rodrigues, V.; Lecoultre, S.; Rydlo, A.; Félix, C. // Journal of Chemical Physics;7/14/2006, Vol. 125 Issue 2, p024511 

    We report absorption spectra for Ag7, Ag9, and Ag11 in an argon matrix grown at a temperature of 28 K and compare them with previous spectra of the same species measured in matrices of argon grown at lower temperatures as well as in neon matrices. We discuss the discrepancies in the light of the...

  • Optical absorption spectra of Ag11 isomers. Martínez, J. I.; Fernández, E. M. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Nov2009, Vol. 52 Issue 1-3, p199 

    The optical absorption spectra of the three most stable structural isomers of the Ag11 cluster were calculated using the time-dependent density functional theory within the Casida formalism. The slightly different spectra of the isomers may permit the identification of the ground-state...

  • Absorption and Emission Dynamics in Concentrated Optical Ensembles under Laser Excitation. Smirnov, V. A.; Ermolaeva, G. M.; Shilov, V. B. // Optics & Spectroscopy;Jun2002, Vol. 92 Issue 6, p851 

    A new theoretical model describing the emission and absorption dynamics in an ensemble of molecules under intense coherent pulsed pumping is developed on the basis of the concepts of cooperative lightinduced luminescence (CLIL). The CLIL development is described within the framework of formalism...

  • Time-frequency theory of pump-probe absorption spectroscopy. Yi Jing Yan; Weimin Zhang // Journal of Chemical Physics;2/8/1997, Vol. 106 Issue 6, p2212 

    Discusses the development of a variation of density matrix formulation based on the nature of field-matter interference in a mixed-time frequency domain to study molecular pump-probe absorption spectra in condensed phases. Consideration of the integrated probe transmittant signals and the...

  • Electronic absorption spectroscopy of matrix-isolated polycyclic aromatic hydrocarbon cations. II. The phenanthrene cation (C14H10+) and its 1-methyl derivative. Salama, F.; Joblin, C.; Allamandola, L. J. // Journal of Chemical Physics;12/15/1994, Vol. 101 Issue 12, p10252 

    The ultraviolet, visible, and near infrared absorption spectra of phenanthrene (C14H10), 1-methylphenanthrene [(CH3)C14H9], and their radical ions [C14H+10; (CH3)C14H+9], formed by vacuum-ultraviolet irradiation, were measured in neon matrices at 4.2 K. The associated vibronic band systems and...

  • Electronic absorption spectra of linear carbon chains in neon matrices. II. C-2n, C2n, and C2nH. Freivogel, Patrick; Fulara, Jan; Jakobi, Michael; Forney, Daniel; Maier, John P. // Journal of Chemical Physics;7/1/1995, Vol. 103 Issue 1, p54 

    Absorption spectra observed between 400 and 2500 nm in 5 K neon matrices have been assigned to electronic transitions of linear C-2n (n=2–10): 2Π←X 2Π, C2n (n=3–7): 3Σ-u←X 3Σ-g, and C2nH (n=3–8): 2Π←X 2Π chains. The species have been...

  • Electronic absorption spectra of linear carbon chains in neon matrices. I. C-6, C6, and C6H. Forney, Daniel; Fulara, Jan; Freivogel, Patrick; Jakobi, Michael; Lessen, Daniel; Maier, John P. // Journal of Chemical Physics;7/1/1995, Vol. 103 Issue 1, p48 

    Electronic absorption spectra of linear C-6, C6, and C6H have been identified in neon matrices at 5 K. The species were produced by codepositing mass selected cations and anions with neon. The ions were generated in a hot cathode discharge source using diacetylene. The spectra of C-6 and C6...

  • Characterization of isolated hydrogen traps by hydrogen permeation experiments. Zhang, Tong-Yi; Wat, Iva // Journal of Applied Physics;5/15/2003, Vol. 93 Issue 10, p6016 

    The present work analyzes hydrogen permeation through a slab sample containing isolated hydrogen traps. The analysis is based on a flux continuity model that considers both the absorption and desorption processes. An analytical solution in series is derived for a dilute system with a low trap...

  • A Novel Method for the Study of Water Absorption Rates by Swellable Matrices. Parakh, S.R.; Gothoskar, A.V.; Karad, M.T. // Pharmaceutical Technology;May2003, Vol. 27 Issue 5, p40 

    Describes a novel method for the study of water absorption rates by swellable matrices. Study of water absorption rate allowing for the study of accurate actual water content determination; Good correlation with the welling behavior of the matrices; Observations that the rate of water...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics