Oscillations of EPR Signals Accompanying Belousov–Zhabotinsky Reaction
Periodical transformation of ferroin to ferriin is accompanied by changes in magnetic properties of liquids during Belousov–Zhabotinsky (BZ) reaction malonic acid, sodium bromide, sodium bromate, ferroin, and sulfuric acid. Instead of the earlier studied oscillation of microwave conductivity accompa...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Magnetochemistry |
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| Online Access: | https://www.mdpi.com/2312-7481/7/1/2 |
| _version_ | 1797543778404270080 |
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| author | Roman Morgunov Yoshifumi Tanimoto |
| author_facet | Roman Morgunov Yoshifumi Tanimoto |
| author_sort | Roman Morgunov |
| collection | DOAJ |
| description | Periodical transformation of ferroin to ferriin is accompanied by changes in magnetic properties of liquids during Belousov–Zhabotinsky (BZ) reaction malonic acid, sodium bromide, sodium bromate, ferroin, and sulfuric acid. Instead of the earlier studied oscillation of microwave conductivity accompanying an oscillating reaction, we propose a flash technique to interrupt the BZ reaction by rapid freezing. Rapid cooling of a solution during chemical oscillations results in a frozen system with a fixed concentration of paramagnetic centers Fe<sup>3+</sup>. EPR spectrum recorded at different stages of the interrupted reaction corresponds to the exact concentration of the ferroin and ferriin components. Following unfreezing unblocks the BZ reaction, and oscillations are still observed. A simulated spectrum allows one to distinguish two groups of Fe<sup>3+</sup> ions of different symmetries. The obtained results are important to explain the earlier observed effect of inhomogeneous magnetic field on BZ reaction front velocity. |
| first_indexed | 2024-03-10T13:50:29Z |
| format | Article |
| id | doaj.art-8c6d43078a504e9bb5840bc0cf0eefde |
| institution | Directory Open Access Journal |
| issn | 2312-7481 |
| language | English |
| last_indexed | 2024-03-10T13:50:29Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Magnetochemistry |
| spelling | doaj.art-8c6d43078a504e9bb5840bc0cf0eefde2023-11-21T02:09:59ZengMDPI AGMagnetochemistry2312-74812020-12-0171210.3390/magnetochemistry7010002Oscillations of EPR Signals Accompanying Belousov–Zhabotinsky ReactionRoman Morgunov0Yoshifumi Tanimoto1Institute of Problems of Chemical Physics, 142432 Chernogolovka, RussiaGraduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1, Kagamiyama, Higashihiroshima 739-8511, JapanPeriodical transformation of ferroin to ferriin is accompanied by changes in magnetic properties of liquids during Belousov–Zhabotinsky (BZ) reaction malonic acid, sodium bromide, sodium bromate, ferroin, and sulfuric acid. Instead of the earlier studied oscillation of microwave conductivity accompanying an oscillating reaction, we propose a flash technique to interrupt the BZ reaction by rapid freezing. Rapid cooling of a solution during chemical oscillations results in a frozen system with a fixed concentration of paramagnetic centers Fe<sup>3+</sup>. EPR spectrum recorded at different stages of the interrupted reaction corresponds to the exact concentration of the ferroin and ferriin components. Following unfreezing unblocks the BZ reaction, and oscillations are still observed. A simulated spectrum allows one to distinguish two groups of Fe<sup>3+</sup> ions of different symmetries. The obtained results are important to explain the earlier observed effect of inhomogeneous magnetic field on BZ reaction front velocity.https://www.mdpi.com/2312-7481/7/1/2Belousov–Zhabotinsky reactionelectron spin resonancecrystal field spitting |
| spellingShingle | Roman Morgunov Yoshifumi Tanimoto Oscillations of EPR Signals Accompanying Belousov–Zhabotinsky Reaction Magnetochemistry Belousov–Zhabotinsky reaction electron spin resonance crystal field spitting |
| title | Oscillations of EPR Signals Accompanying Belousov–Zhabotinsky Reaction |
| title_full | Oscillations of EPR Signals Accompanying Belousov–Zhabotinsky Reaction |
| title_fullStr | Oscillations of EPR Signals Accompanying Belousov–Zhabotinsky Reaction |
| title_full_unstemmed | Oscillations of EPR Signals Accompanying Belousov–Zhabotinsky Reaction |
| title_short | Oscillations of EPR Signals Accompanying Belousov–Zhabotinsky Reaction |
| title_sort | oscillations of epr signals accompanying belousov zhabotinsky reaction |
| topic | Belousov–Zhabotinsky reaction electron spin resonance crystal field spitting |
| url | https://www.mdpi.com/2312-7481/7/1/2 |
| work_keys_str_mv | AT romanmorgunov oscillationsofeprsignalsaccompanyingbelousovzhabotinskyreaction AT yoshifumitanimoto oscillationsofeprsignalsaccompanyingbelousovzhabotinskyreaction |