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Singlet Oxygen measurement

by bubbling the solution with pure oxygen for 5 min before measurement. The excitation maximum of the [Ru(bpy)3]2+ complex is in the visible region of the spectrum, near 450 nm.

A FLUOROLOG system, equipped with a 450-W xenon lamp, single-grating excitation and emission monochromators, and near-IR accessories (DSS-IGA020L InGaAs detector and emission grating at 600 grooves mm1, blazed at 1000 nm) was used to measure the 1O2 emission spectrum. A high-pass filter (λ = 780 nm) was used as an order-sorter, necessary when such large wavelength ranges are spanned. Figure 1 shows the emission spectrum obtained using an integration time of 0.1 s and a bandpass of 12 nm. The excellent signal-to-noise ratio is seen in the graph.


1 Wasserman, H.H.; Murray, R.W., in Singlet Oxygen; Academic Press: New York, 1979.
2 Mulazzani, et. al. J. Phys. Chem. 1994, 98, 1145.


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