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Singlet molecular oxygen by direct excitation

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Abstract

Direct excitation at 1064 nm and detection of singlet molecular oxygen at 1270 nm is made possible by the availability of powerful YAG-lasers and sensitive NIR photomultipliers. Singlet oxygen was generated in condensed phase at 77 K by direct excitation at 1064 nm (without the use of sensitizers). Several luminescing species were observed by time resolved luminescence spectroscopy and luminescence lifetime measurements, including the single molecule 1Δg and 1Σg+ +states as well as luminescence from the [1Δg]2 simultaneous transition. As an application we propose a novel method for obtaining quantitative non-intrusive mapping of the 2-D oxygen concentrations and pressure at cryogenic temperatures, which is of importance in aircraft design for high altitudes.

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Authors and Affiliations

  1. Department of Chemistry, Columbia University, New York, NY, 10027, USA

    Steffen Jockusch & Nicholas J. Turro

  2. Department of Chemistry, University of Washington, Seattle, WA, 98195, USA

    Elizabeth K. Thompson, Martin Gouterman, James B. Callis & Gamal E. Khalil

Authors
  1. Steffen Jockusch
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  2. Nicholas J. Turro
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  3. Elizabeth K. Thompson
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  4. Martin Gouterman
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  5. James B. Callis
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  6. Gamal E. Khalil
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Corresponding author

Correspondence to Gamal E. Khalil.

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Jockusch, S., Turro, N.J., Thompson, E.K. et al. Singlet molecular oxygen by direct excitation. Photochem Photobiol Sci 7, 235–239 (2008). https://doi.org/10.1039/b714286b

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  • DOI: https://doi.org/10.1039/b714286b

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