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. 2017 Oct 3;139(43):15292–15295. doi: 10.1021/jacs.7b07427

Figure 2.

Figure 2

Photochemical release of CO using 635 nm light (150 mW) in a mixture of PS and Mn2(CO)10 in DMA. (a) Evolution of UV–vis absorption spectra in 1 min intervals during irradiation of a 3 mL solution ([PS] = 10 μM, [Mn2(CO)10] = 100 μM). Inset: evolution of separate absorption bands at 340 nm (α, black), 440 nm (β, blue), and 628 nm (red, γ). (b) CO release vs time during irradiation of a 1 mL DMA solution in a closed desiccator setup. Black: mixture of PS (20 μM) and Mn2(CO)10 (1.0 mM). Red: only Mn2(CO)10. Blue: only PS. (c) Phosphorescence of PS (10 μM, λexc = 635 nm) at different concentrations of Mn2(CO)10 in deoxygenated DMA. Inset: Stern–Volmer plot of data with a straight-line fit (slope = 2900 M–1, r2 = 0.997). (d) Evolution of liquid-phase IR-spectra during irradiation of a 1 mL DMA solution ([PS] = 200 μM, [Mn2(CO)10] = 10.0 mM). Spectra recorded every 3 min for the first 75 min, then every 15 min.