Dinâmica complexa no sistema bromato/hipofosfito/acetona/manganês e ferroína Complex Dynamics in the bromate/hypophosphite/acetone/manganese and ferroin system
<abstract language="eng">New chemical systems have been recently designed for the study of complex phenomena such as oscillatory dynamics in the temporal domain and spatiotemporal pattern formation. Systems derived from oscillators based on the chemistry of bromate are the most exten...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2007-01-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000800026 |
| _version_ | 1818423099346911232 |
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| author | Gustavo Tokoro Hyrla C. L. Oliveira Hamilton Varela |
| author_facet | Gustavo Tokoro Hyrla C. L. Oliveira Hamilton Varela |
| author_sort | Gustavo Tokoro |
| collection | DOAJ |
| description | <abstract language="eng">New chemical systems have been recently designed for the study of complex phenomena such as oscillatory dynamics in the temporal domain and spatiotemporal pattern formation. Systems derived from oscillators based on the chemistry of bromate are the most extensively studied, with the celebrated Belousov-Zhabotinsky (BZ) reaction being the most popular example. Problems such as the formation of bubbles (CO2) and solid precipitate in the course of the reaction and the occurrence of simply short-lived oscillations under batch conditions are very common and, in some cases, compromise the use of some of these systems. It is investigated in this paper the dynamic behavior of the bromate/hypophosphite/acetone/dual catalyst system, which has been sugested as an interesting alternative to circumvent those inconvenients. In this work, manganese and ferroin are employed as catalysts and the complete system (BrO3-/H2PO2-/acetone/Mn(II)-ferroin) is studied under batch conditions. Temporal symmetry breaking was studied in a reactor under agitation by means of simultaneous records of the potential changes of platinum and Ag/AgBr electrodes, both measured versus a reversible hydrogen electrode. Additionally, spatio-temporal formation of target patterns and spiral waves were obtained when the oscillating mixture was placed in a quasi two-dimensional reactor. |
| first_indexed | 2024-12-14T13:36:46Z |
| format | Article |
| id | doaj.art-4c2ae39dae9a4f3a875f9e20ddf2a45a |
| institution | Directory Open Access Journal |
| issn | 0100-4042 1678-7064 |
| language | English |
| last_indexed | 2024-12-14T13:36:46Z |
| publishDate | 2007-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-4c2ae39dae9a4f3a875f9e20ddf2a45a2022-12-21T22:59:33ZengSociedade Brasileira de QuímicaQuímica Nova0100-40421678-70642007-01-013081930193710.1590/S0100-40422007000800026Dinâmica complexa no sistema bromato/hipofosfito/acetona/manganês e ferroína Complex Dynamics in the bromate/hypophosphite/acetone/manganese and ferroin systemGustavo TokoroHyrla C. L. OliveiraHamilton Varela<abstract language="eng">New chemical systems have been recently designed for the study of complex phenomena such as oscillatory dynamics in the temporal domain and spatiotemporal pattern formation. Systems derived from oscillators based on the chemistry of bromate are the most extensively studied, with the celebrated Belousov-Zhabotinsky (BZ) reaction being the most popular example. Problems such as the formation of bubbles (CO2) and solid precipitate in the course of the reaction and the occurrence of simply short-lived oscillations under batch conditions are very common and, in some cases, compromise the use of some of these systems. It is investigated in this paper the dynamic behavior of the bromate/hypophosphite/acetone/dual catalyst system, which has been sugested as an interesting alternative to circumvent those inconvenients. In this work, manganese and ferroin are employed as catalysts and the complete system (BrO3-/H2PO2-/acetone/Mn(II)-ferroin) is studied under batch conditions. Temporal symmetry breaking was studied in a reactor under agitation by means of simultaneous records of the potential changes of platinum and Ag/AgBr electrodes, both measured versus a reversible hydrogen electrode. Additionally, spatio-temporal formation of target patterns and spiral waves were obtained when the oscillating mixture was placed in a quasi two-dimensional reactor.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000800026oscillationschemical kineticspattern formation |
| spellingShingle | Gustavo Tokoro Hyrla C. L. Oliveira Hamilton Varela Dinâmica complexa no sistema bromato/hipofosfito/acetona/manganês e ferroína Complex Dynamics in the bromate/hypophosphite/acetone/manganese and ferroin system Química Nova oscillations chemical kinetics pattern formation |
| title | Dinâmica complexa no sistema bromato/hipofosfito/acetona/manganês e ferroína Complex Dynamics in the bromate/hypophosphite/acetone/manganese and ferroin system |
| title_full | Dinâmica complexa no sistema bromato/hipofosfito/acetona/manganês e ferroína Complex Dynamics in the bromate/hypophosphite/acetone/manganese and ferroin system |
| title_fullStr | Dinâmica complexa no sistema bromato/hipofosfito/acetona/manganês e ferroína Complex Dynamics in the bromate/hypophosphite/acetone/manganese and ferroin system |
| title_full_unstemmed | Dinâmica complexa no sistema bromato/hipofosfito/acetona/manganês e ferroína Complex Dynamics in the bromate/hypophosphite/acetone/manganese and ferroin system |
| title_short | Dinâmica complexa no sistema bromato/hipofosfito/acetona/manganês e ferroína Complex Dynamics in the bromate/hypophosphite/acetone/manganese and ferroin system |
| title_sort | dinamica complexa no sistema bromato hipofosfito acetona manganes e ferroina complex dynamics in the bromate hypophosphite acetone manganese and ferroin system |
| topic | oscillations chemical kinetics pattern formation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000800026 |
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