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. Author manuscript; available in PMC: 2014 Feb 25.
Published in final edited form as: J Am Chem Soc. 2013 Jun 6;135(24):9186–9194. doi: 10.1021/ja403965h

Figure 1.

Figure 1

(a) UV–vis spectral changes showing the conversion from [(Bn-TPEN)MnIV(O)]2+ (red line) to [(Bn-TPEN)Mn (O)]2+– (Sc3+)1 (green line) upon addition of incremental amounts of Sc3+ (from 0.0 to 2.0 mM) in the titration experiment. (b) Spectroscopic titration monitored at 1020 nm (red rhombuses) due to the decay of [(Bn-TPEN)MnIV(O)]2+ and at 740 nm (green squares) due to the formation of [(Bn-TPEN)MnIV(O)]2+–(Sc3+)1. (c) UV–vis spectral changes showing the conversion from [(Bn-TPEN)Mn (O)]2+– (Sc3+)1 (green line) to [(Bn-TPEN)MnIV (O)]2+–(Sc3+)2 (blue line) observed upon addition of Sc3+ ions (from 0.0 to 12 mM). (d) Spectroscopic titration monitored at 690 nm (blue squares) due to [(Bn-TPEN)MnIV(O)]2+–(Sc3+)2.