A novel route to pH oscillators |
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| Institution: | 1. Department of Mathematical and Life Sciences, Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan;2. Meiji Institute for Advanced Study of Mathematical Sciences (MIMS), Meiji University, 4-21-1 Nakano, Nakano-ku, Tokyo 164-8525, Japan;3. Graduate School of Advanced Mathematical Sciences, Meiji University, 4-21-1 Nakano, Nakano-ku, Tokyo 164-8525, Japan;4. Department of Physics, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan;5. Meiji University School of Interdisciplinary Mathematical Sciences Department of Mathematical Sciences Based on Modeling and Analysis, Meiji University, 4-21-1 Nakano, Nakano-ku, Tokyo 164-8525, Japan;1. University of Chemistry and Technology Prague, Prague, 166 28, Czechia;2. Helmholtz-Zentrum Dresden-Rossendorf, Dresden, 01328, Germany;3. TU Dresden, Dresden, 01062, Germany;4. Hiroshima University, Higashi-Hiroshima, 739-8521, Japan;1. College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China;2. Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, People’s Republic of China;1. Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1., Szeged H-6720, Hungary;2. Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1., Szeged H-6720, Hungary |
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| Abstract: | The formaldehyde–sulfite reaction is an acid to alkali clock reaction in batch, which displays complex behaviour in a flow reactor. Current published mechanisms do not account for the behaviour in an open system. In this Letter, we construct a minimal model based on this system and demonstrate that a base-catalysed rate-determining step coupled with an appropriate OH− consuming reaction can result in bistability and oscillations. The model may provide a method for the design of organic-based pH oscillators. |
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