INSTABILITIES IN PROPAGATING REACTION-DIFFUSION FRONTS OF THE IODATE ARSENIOUS ACID REACTION

被引：82

作者：

HORVATH, D ^{[1
]}

SHOWALTER, K ^{[1
]}

机构：

[1] W VIRGINIA UNIV,DEPT CHEM,MORGANTOWN,WV 26506

来源：

JOURNAL OF CHEMICAL PHYSICS | 1995年 / 102卷 / 06期

关键词：

D O I：

10.1063/1.468676

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Instabilities in propagating fronts of the iodate-arsenous acid reaction are predicted by an empirical rate-law model. The planar front loses stability when the ratio of the reactant diffusivity to the autocatalyst diffusivity exceeds a critical value. The relative diffusivities can be altered by introducing a reagent that reacts specifically with the autocatalyst to form an immobile complex. Experiments were carried out using a convection-free gelled medium, loaded with reaction mixture containing complexing agent at different concentrations. Instabilities were found above a critical concentration, with the appearance of cellular fronts much like those predicted by the empirical rate-law model. © 1995 American Institute of Physics.

引用

页码：2471 / 2478

页数：8

共 29 条

[1]

[Anonymous], 1991, MATH BIOL

[2] STRUCTURE AND DYNAMICS OF MODULATED TRAVELING WAVES IN CELLULAR FLAMES [J].