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Mixed mode and sequential oscillations in the cerium-bromate-4-aminophenol photoreaction
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10.1063/1.4817514
/content/aip/journal/chaos/23/3/10.1063/1.4817514
http://aip.metastore.ingenta.com/content/aip/journal/chaos/23/3/10.1063/1.4817514

Figures

Image of FIG. 1.
FIG. 1.

Time series of the cerium catalyzed bromate-4-aminophenol reaction carried out at different initial sulfuric acid concentrations: (a) 1.0 M, (b) 0.80 M, (c) 0.60 M, and (d) 0.4 M. Other reaction conditions were [4-AP] = 0.025 M, [NaBrO] = 0.06 M, and [Ce(IV)] = 3.0 × 10 M.

Image of FIG. 2.
FIG. 2.

Time series of the cerium catalyzed bromate-4-aminophenol reaction carried out at different 4-aminophenol concentrations: (a) 0.035 M, (b) 0.030 M, (c) 0.0275 M, (d) 0.025 M, and (e) 0.020 M. Other reaction conditions were [NaBrO] = 0.06 M, [HSO] = 0.8 M, and [Ce(IV)] = 3.0 × 10 M.

Image of FIG. 3.
FIG. 3.

Time series of the cerium catalyzed bromate-4-aminophenol reaction carried out at different initial bromate concentrations: (a) 0.070 M, (b) 0.060 M, (c) 0.050 M, (d) 0.045 M. Other reaction conditions were [4-AP] = 0.025 M, [HSO] = 0.8 M, and [Ce(IV)] = 3.0 × 10 M.

Image of FIG. 4.
FIG. 4.

Time series of the cerium catalyzed bromate-4-aminophenol reaction carried out at different initial cerium concentrations: (a) 4.5 × 10 M, (b) 3.75 × 10 M, (c) 2.25 × 10 M, and (d) 1.5 × 10 M. Other reaction conditions were [4-AP] = 0.025 M, [HSO] = 0.8 M, and [NaBrO] = 0.060 M.

Image of FIG. 5.
FIG. 5.

Phase diagram presenting the region of complex oscillatory behavior in the concentration of 4-AP and HSO concentration plane. (x) represents conditions under which the system displays transient complex oscillations and the filled square (▪) denotes conditions where complex oscillations were absent.

Image of FIG. 6.
FIG. 6.

Time series illustrating rich nonlinear dynamics at boundary regions in the 4-AP and HSO concentration plane: (a) 0.03 M 4-AP and 1.2 M HSO, (b) 0.02 M 4-AP and 0.04 M HSO. Other reaction conditions were [NaBrO] = 0.06 M and [Ce(IV)] = 3.0 × 10 M.

Image of FIG. 7.
FIG. 7.

Time series of the cerium catalyzed bromate-4-aminophenol reaction carried out at different initial light intensities: (a) 468 mW/cm, (b) 135 mW/cm, (c)105 mW/cm, (d) 65 mW/cm, and (e) 0 mW/cm. Other reaction conditions were [4-AP] = 0.025 M, [NaBrO] = 0.06 M,[HSO] = 0.8 M, and [Ce(IV)]= 3.0 × 10 M.

Image of FIG. 8.
FIG. 8.

Time series illustrating the photosensitive nature of the cerium catalyzed bromate-4-aminophenol reaction. The reaction conditions are: [4-AP]= 0.025 M, [NaBrO] = 0.06 M, [HSO]= 0.8 M, [Ce(IV)] = 3.0 × 10 M, and light intensity = 65 mW/cm.

Image of FIG. 9.
FIG. 9.

Time series showing the emergence of complex oscillations through the coupling of two autocatalytic cycles using the model proposed in Table I . (a) [Ce(IV)] = 0.0 M, (b) [Ce(IV)] = 1.317 × 10 M, and (c) [Ce(IV)]= 3.0 × 10 M. [HAr(OH)] = 0.025 M, [NaBrO] = 0.06 M, [HSO]= 0.8 M, and initial concentrations of all other species were set to 0.

Tables

Generic image for table
Table I.

Model employed for simulating transient complex oscillations.

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/content/aip/journal/chaos/23/3/10.1063/1.4817514
2013-08-05
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Mixed mode and sequential oscillations in the cerium-bromate-4-aminophenol photoreaction
http://aip.metastore.ingenta.com/content/aip/journal/chaos/23/3/10.1063/1.4817514
10.1063/1.4817514
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