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. Author manuscript; available in PMC: 2011 Oct 24.
Published in final edited form as: J Am Chem Soc. 2010 Jan 20;132(2):737–747. doi: 10.1021/ja908326z

Figure 5.

Figure 5

Transient absorption spectra of pyrazoline 1a in a) methanol, b) 180 mM TFA in MeOH, and c) 10 μM [Cu(I)(CH3CN)4]PF6 in MeOH. Top row: Color-coded contour plots of the transient difference absorption traces on a logarithmic time scale. Each plot is represented on the absorption scale shown to the right. Bottom row: Transient absorption progression at 480 nm.