Dinâmica oscilatória em sistemas contendo bromato e 1,4-ciclo-hexanodiona em meio ácido: I. Efeito da temperatura
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
04/11/2013
04/11/2013
2012
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Resumo |
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 °C. Activation energies (Ea) were estimated in different ways for the pre-oscillatory and oscillatory regimes. In any case, the Ea 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. |
Identificador |
Quím. Nova,v.35,n.2,p.348-354,2012 0100-4042 http://www.producao.usp.br/handle/BDPI/38585 10.1590/S0100-40422012000200022 http://www.scielo.br/scielo.php?script=sci_pdf&pid=S0100-40422012000200022&lng=en&nrm=iso&tlng=en |
Idioma(s) |
por |
Publicador |
Sociedade Brasileira de Química |
Relação |
Química Nova |
Direitos |
openAccess |
Palavras-Chave | #oscillations #complex kinetics #1,4-cyclohexanedione |
Tipo |
article original article |