Journal
APPLIED OPTICS
Volume 43, Issue 31, Pages 5901-5910Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.43.005901
Keywords
-
Categories
Ask authors/readers for more resources
We measured fluorescence quantum yields of acetone and 3-pentanone as a pure gas and with nitrogen diluent at room temperature at 20, 507, and 1013 mbar using 248, 266, and 308 nm excitation by calibrating the optical collection system with Rayleigh scattering from nitrogen. At 20 mbar with 308-nm excitation, the fluorescence quantum yields for acetone and 3-pentanone are 7 +/- 1 X 10(-4) and 1.1 +/- 0.2 X 10(-3), respectively, and each decreases with decreasing excitation wavelength. These directly measured values are significantly lower than earlier ones that were based on a chain of relative measurements. The observed pressure and excitation wavelength dependence is in qualitative agreement with a previously developed fluorescence quantum yield model, but the absolute numbers disagree. Changing acetone's fluorescence rate constant to 3 X 10(5) s(-1) from its previous value of 8 X 10(5) s(-1) resulted in good agreement between our measurements and the model. (C) 2004 Optical Society of America.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available