Extended Data Fig. 5: Detection of H2S production.

a, Pb(OAc)2 test paper results for the detection of H2S production of IV under different reaction conditions (From left to right: Thermal 160 °C, thermal 135 °C + Cat, photo 435 nm @ r.t.). b, Pb(OAc)2 solution (2 mmol%) results for the detection of H2S production of IV under different reaction conditions (Top: Thermal 140 °C, 5 h; Bottom: photo 435 nm @ r.t. for 48 h). For reaction conditions please see Supplementary Information.