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Singlet molecular oxygen by direct excitation

Steffen Jockusch; Nicholas J. Turro; Elizabeth K. Thompson; Martin Gouterman; James B. Callis; Gamal E. Khalil

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:
Type:
Articles
Department:
Chemistry
Volume:
7
Permanent URL:
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
Publisher DOI:
http://dx.doi.org/10.1039/b714286b
Item views:
329
Metadata:
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