Trigger waves in iodate-driven oscillatory reaction systems
Abstract
Both one-dimensional and two-dimensional trigger-wave propagation in the systems (A) IO–3+ Ce4+/Mn2++ mandelic acid + acetone + H2SO4+ ferroin/starch, (B) IO–3+ Ce4+/Mn2++ acetylacetone + H2SO4+ ferroin/starch and (C) IO–3+ Ce4+/Mn2++ mandelic acid + arsenite + H2SO4+ ferroin/starch has been investigated. Single red bands (with ferroin) and blue bands (with starch) propagate with velocity v given by the relation v=A exp (–Ea/RT)[H+.]–10[IO–3]1/20 where A and Ea are constants. A is different for each of the three systems but Ea has the same value, 12.2+0.2 cal mol–1, for both one-dimensional and two-dimensional waves.