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(a) Absorption spectral change in the course of the reaction of [RuIII(dmp−)(TPA)]2+ with 4-nitrophenol monitored by UV-vis spectrometer in MeCN at 293 K. Inset: difference spectra for the last spectrum. [RuIII(dmp−)(TPA)]2+ = 2.5 × 10−5 M; [4-nitrophenol] = 1.2 × 10−1 M (b) The change of absorbance at 430 nm (circle) and the biexponential fit (red line).
