JCP Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

You Tube Flickr Twitter UniPHY Group iResearch App Facebook

Journal of Chemical Physics / Volume 131 / Issue 19 / ARTICLES / Gas Phase Dynamics and Structure: Spectroscopy, Molecular Interactions, Scattering, and Photochemistry

J. Chem. Phys. 131, 194309 (2009); http://dx.doi.org/10.1063/1.3265956 (8 pages)

Electronic photodissociation spectra and decay pathways of gas-phase IrBr62−

Jesse C. Marcum and J. Mathias Weber

Department of Chemistry and Biochemistry, and JILA, NIST, University of Colorado, Boulder, Colorado 80309, USA

View MapView Map

(Received 17 July 2009; accepted 29 October 2009; published online 20 November 2009)

We report photodissociation action spectra for the dianion IrBr62− in the range of 1.08–5.6 eV. The photoproducts observed are IrBr6−, IrBr5−, IrBr4− and Br−. Comparison of the action spectra to the aqueous absorption spectrum of K2IrBr6 leads to the determination of solvatochromic shifts of between 0.02 and 0.16 eV in the visible region and approximately 0.3 eV in the ultraviolet. The fragmentation branching ratios vary greatly as a function of photon energy. This behavior can be attributed to differences in the fragmentation mechanisms as well as differences in the excited states that are accessed at different energies. Absorption in the visible region favors fragmentation into IrBr5− and Br−, whereas a number of fragmentation channels and mechanisms are active in the ultraviolet region. These mechanisms include fragmentation as well as electron detachment and dissociative electron detachment.

© 2009 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. METHODS
  3. RESULTS
    1. Photodissociation spectra
    2. IrBr5− action
    3. Br− action
    4. IrBr4− action:
    5. IrBr6− action
  4. DISCUSSION
    1. Peak assignments and comparison to aqueous solution spectrum
    2. Fragmentation mechanisms
  5. CONCLUSIONS

RELATED DATABASES

To view database links for this article, you need to log in.

KEYWORDS and PACS

Keywords

electron attachment, excited states, iridium compounds, molecule-photon collisions, negative ions, photodissociation, spectrochemical analysis, ultraviolet spectra, visible spectra

PACS

  • 33.80.Gj

    Diffuse spectra; predissociation, photodissociation

  • 82.50.Hp

    Processes caused by visible and UV light

  • 33.20.Kf

    Visible spectra

  • 82.80.Dx

    Analytical methods involving electronic spectroscopy

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3265956

PUBLICATION DATA

ISSN

0021-9606 (print)  
1089-7690 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    L. S. Wang, C. F. Ding, X. B. Wang, and S. E. Barlow, Rev. Sci. Instrum. 70, 1957 (1999)RSINAK000070000004001957000001.

    X. B. Wang and L. S. Wang, J. Chem. Phys. 111, 4497 (1999)JCPSA6000111000010004497000001.

    J. Friedrich, S. Gilb, O. T. Ehrler, A. Behrendt, and M. M. Kappes, J. Chem. Phys. 117, 2635 (2002)JCPSA6000117000006002635000001.

    C. Rensing, O. T. Ehrler, J. Yang, A. Unterreiner, and M. M. Kappes, J. Chem. Phys. 130, 234306 (2009)JCPSA6000130000023234306000001.

    A. D. Becke, Phys. Rev. A 38, 3098 (1988), C. T. Lee, W. T. Yang, and R. G. Parr, Phys. Rev. B 37, 785 (1988).

    J. R. Dickinson, P. N. Schatz, J. A. Spencer, and S. B. Piepho, J. Chem. Phys. 56, 2668 (1972)JCPSA6000056000006002668000001.

    E. P. Wigner, Phys. Rev. 73, 1002 (1948).

    D. Löffler, J. M. Weber, and M. M. Kappes, J. Chem. Phys. 123, 224308 (2005)JCPSA6000123000022224308000001.

    G. Bojesen, P. Hvelplund, T. J. D. Jorgensen, and S. B. Nielsen, J. Chem. Phys. 113, 6608 (2000)JCPSA6000113000016006608000001.


For access to citing articles, you need to log in.


Figures (4) Tables (1)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)


Close

Google Calendar

ADVERTISEMENT

Your Recent History Recent History Help

Recently Viewed

  1. Electronic photodissociation spectra and decay pathways of gas-phase IrBr62−
  2. Efficient calculation of the polarization induced by N coherent laser pulses
  3. Laboratory observation of the valence anion of cyanoacetylene, a possible precursor for negative ions in space
  4. Composition and concentration anomalies for structure and dynamics of Gaussian-core mixtures
  5. Bound states of the OH(2Π)–HCl complex on ab initio diabatic potentials
Go to AIP Home
Copyright © American Institute of Physics
close