Figure 9.

Time-resolved IR spectra of Re(N,N)(A)-labeled azurins in the high-energy part of the ν(CO) region. From top to bottom: Re(phen)(K)AzCu^II, Re(dmp)(K)AzCu^II, Re^I(dmp)(Y)AzCu^II, Re^I(dmp)(F)AzCu^II, and Re^I(dmp)(W)AzCu^II (3-4 mM in KP_i-D₂O, pD ~ 7.1, 21 °C) measured at selected time delays (see the top panel) after 400 nm, ~150 fs laser-pulse excitation. The dotted line shows the position of the highest excited-state band of Re^I(dmp)(K)AzCu^II. Experimental points are separated by ~5 cm^-1 for Re^I(dmp)(Y)AzCu^II and ~1.9 cm^-1 for all others.

*: spectral feature due to the ³CS formation.