Articles:
Singlet molecular oxygen by direct excitation
Steffen Jockusch; Nicholas J. Turro; Elizabeth K. Thompson; Martin Gouterman; James B. Callis; Gamal E. Khalil
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- Title:
- Singlet molecular oxygen by direct excitation
- Author(s):
-
Jockusch, Steffen
Turro, Nicholas J.
Thompson, Elizabeth K.
Gouterman, Martin
Callis, James B.
Khalil, Gamal E. - Date:
- 2008
- Type:
- Articles
- Department:
- Chemistry
- Volume:
- 7
- Permanent URL:
- http://hdl.handle.net/10022/AC:P:8597
- Book/Journal Title:
- Photochemical & Photobiological Sciences
- 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 1Δgand 1 Σg+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.
- Subject(s):
- Chemistry
- DOI:
- http://dx.doi.org/10.1039/b714286b
- Item views:
- 293