Figure 5.

Conformational kinetics of 10b-h-azob (in a 20/80 trifluoroethanol/water solution) induced by a nanosecond 355 nm laser pulse and probed at different frequencies, as indicated. These kinetic traces were collected at 24.4 °C, and in each case a linear background signal arising from the solvent has been subtracted for clarity. The smooth lines are fits of these traces to a single-exponential function with the following time constants: 960 ± 60 ns for 1630 cm^–1 and 860 ± 40 ns for 1680 cm^–1.