The quenching of tryptophan fluorescence by dissolved O₂ gas was monitored by measuring the emission lifetimes at 348 nm in aqueous solutions. [0₂]/(10-² mol dm-³) T/(10-⁹ s) 0 2.3 5.5 8 10.8 2.6 1.5 0.92 0.71 0.57 A. 0.95 E-2 M B. 4.3 E-2 M C. 1.8 E-2 M D. 3.0 E-2 M E. None of the choices From the data above, predict the value of [0₂] required to decrease the intensity of tryptophan emission to 50% of the unquenched value.
The quenching of tryptophan fluorescence by dissolved O₂ gas was monitored by measuring the emission lifetimes at 348 nm in aqueous solutions. [0₂]/(10-² mol dm-³) T/(10-⁹ s) 0 2.3 5.5 8 10.8 2.6 1.5 0.92 0.71 0.57 A. 0.95 E-2 M B. 4.3 E-2 M C. 1.8 E-2 M D. 3.0 E-2 M E. None of the choices From the data above, predict the value of [0₂] required to decrease the intensity of tryptophan emission to 50% of the unquenched value.
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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![The quenching of tryptophan fluorescence by dissolved O₂ gas was monitored by measuring the
emission lifetimes at 348 nm in aqueous solutions.
[0₂]/(10-² mol
dm-³)
T/(10-⁹ s)
0 2.3 5.5
8
10.8
2.6 1.5 0.92 0.71 0.57
A. 0.95 E-2 M
B. 4.3 E-2 M
C. 1.8 E-2 M
D. 3.0 E-2 M
E. None of the choices
From the data above, predict the value of [0₂] required to decrease the intensity of tryptophan
emission to 50% of the unquenched value.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc1aa32f7-80af-4d7e-b5c4-f80852c0e80c%2F9c4f87b8-3f0f-43fc-b309-d06abc82793f%2Fdivln7kk_processed.png&w=3840&q=75)
Transcribed Image Text:The quenching of tryptophan fluorescence by dissolved O₂ gas was monitored by measuring the
emission lifetimes at 348 nm in aqueous solutions.
[0₂]/(10-² mol
dm-³)
T/(10-⁹ s)
0 2.3 5.5
8
10.8
2.6 1.5 0.92 0.71 0.57
A. 0.95 E-2 M
B. 4.3 E-2 M
C. 1.8 E-2 M
D. 3.0 E-2 M
E. None of the choices
From the data above, predict the value of [0₂] required to decrease the intensity of tryptophan
emission to 50% of the unquenched value.
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