I'm looking at the excited (triplet) state of a pyridine n-oxide. The lifetime is quite long (on the order of 0.1 ms). The reaction is quenched by oxygen and must be producing singlet oxygen. Does anyone know of a good chemical trap that isn't too strongly absorbing at 308 nm that would preferably emit photons (my excited state does not phosphores). I have tried diphenylisobenzofuran. My solvent is acetonitrile.
Depends on of your analytical methods and solvents. DPBF have not worked? You can also try with some olefine ( Journal of Photochemistry and Photobiology A: Chemistry, Volume 91, Number 3, 15 November 1995 , pp. 179-185(7), DOI: http://dx.doi.org/10.1016/1010-6030(95)04116-5).
We have also made it with a beetroot extract: J. Braz. Chem. Soc. vol.20 no.1 São Paulo 2009, http://dx.doi.org/10.1590/S0103-50532009000100006
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