The optical path from each of the lasers to the sample was organized very similar to a periscope reflected two times: first by one prism placed close to the laser head and second by mirrored surface located inside the optical canal close to the middle of the sample (Fig. ). The bottom mirrored surface has a curved cylindrical shape to stretch the circular beam to an elliptical shape for better illumination along the vertical axis. the sample was bubbled by helium to remove dissolved oxygen, then it was irradiated by lasers 450 nm during helium bubbling for ten minutes to get the 25% (14 mM) of the stationary concentration of cis-ABZ. Next, we bubbled the solution with parahydrogen for about five minutes to activate the catalyst. 15 N2-azobenzene was synthesized as described in ref. . Methanol-d4 (99.8%) was purchased from Carl-Roth (Germany). Dimethylsulfoxide-d6 (99.5%) was purchased from Deutero-GmbH (Germany). Precatalyst [IrCl(1,5-cyclooctadiene)(IMes)] was synthetized as described in ref. .