A Belousov–Zhabotinsky Oscillator Driven by a Water‐Soluble Metalloporphyrin

We report for the first time that carbonyl meso ‐tetrakis(4‐N‐methylpyridiniumyl)porphyrinatoruthenium(II) tetraacetate ( Ru‐TPyP ) worked as a catalyst for the Belousov–Zhabotinsky (BZ) reaction. The profiles from the BZ reaction were measured by potentiometric measurements with a Pt electrode and a Hg/HgNO 3 reference electrode. Ru‐TPyP was added lastly to the aqueous solution containing malonic acid (MA), sodium bromate (NaBrO 3 ), and nitric acid (HNO 3 ) at 22 ± 2 °C. The oscillation of the BZ reaction was observed over a fixed period of time only in the solution containing 2.1 × 10 −2 M MA, 3.2 × 10 −2 M NaBrO 3 and 5.5 × 10 −2 M HNO 3 . The self‐oscillation period in Ru‐TPyP was approximately 100 s and it continued for approximately 2600 s.