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Dinâmica oscilatória em sistemas contendo bromato e 1,4-ciclo-hexanodiona em meio ácido: I. Efeito da temperatura
| Content Provider | Scilit |
|---|---|
| Author | Oliveira, Hyrla C. L. Oliveira, Tatiane B. Varela, Hamilton |
| Copyright Year | 2012 |
| Description | OSCILLATORY DYNAMICS IN SYSTEMS CONTAINING BROMATE AND 1,4-CYCLOHEXANEDIONE IN ACIDIC MEDIA. I. THE EFFECT OF TEMPERATURE. We present in this work the influence of temperature on the dynamics of homogeneous chemical systems containing bromate and 1,4-cyclohexanedione (1,4-CHD) in acidic media. In particular, the following systems were studied: bromate/1,4-CHD/acid, bromate/1,4-CHD/ferroin/acid and bromate/1,4-CHD/trisbipyridine ruthenium/acid. Investigations were carried out by means of an electrochemical probe, at five temperatures between 5 and 45 degrees C. Activation energies (E-a) were estimated in different ways for the pre-oscillatory and oscillatory regimes. In any case, the E-a was found to depend on the catalyst, composition and initial concentrations. In addition, it was observed that ferroin and trisbipyridine ruthenium act as catalysts only during the transition between the induction period and oscillatory regime |
| Related Links | http://www.scielo.br/pdf/qn/v35n2/22.pdf http://www.scielo.br/scielo.php?script=sci_pdf&pid=S0100-40422012000200022&lng=pt&nrm=iso&tlng=en |
| Ending Page | 354 |
| Page Count | 7 |
| Starting Page | 348 |
| ISSN | 01004042 |
| e-ISSN | 01004042 |
| DOI | 10.1590/s0100-40422012000200022 |
| Journal | Química Nova |
| Issue Number | 2 |
| Volume Number | 35 |
| Language | English |
| Publisher | FapUNIFESP (SciELO) |
| Publisher Date | 2012-01-01 |
| Access Restriction | Open |
| Subject Keyword | Química Nova cyclohexanedione |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry |