The Front Cover represents an artist impression of the autonomous, time-programmable temperature increase alongside acid generation in the chlorate-sulfite-gluconolactone reaction network. The reaction mixture, an aqueous solution of chlor...
Artikel
Acid Autocatalysis Best Served Hot: The Chlorate–Sulfite–Gluconolactone System as a Thermochemical Clock
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Clock Reaction, Double Feature: The autonomous activation of acid-autocatalyzed sulfite – halogenate (iodate, bromate, chlorate) reactions is programmed using slow acid generators (δ-gluconolactone GL, and 1,3-propanesultone PrS). It is found that, in the presence of GL, the acid-autocatalyzed chlorate–sulfite reaction is able to generate a sudden change in both temperature and pH with a pre-determined magnitude and induction time.
Abstract
The autonomous activation of acid-autocatalyzed sulfite–halogenate (iodate, bromate, chlorate) reactions is programmed using slow acid generators (δ-gluconolactone GL, and 1,3-propanesultone PrS). A remarkable correlation is found between the pH- and temperature-time profiles, especially for the chlorate–sulfite–GL system. Further optimization of the latter resulted in a chemical system able to generate sudden temperature and pH changes after a tailorable induction time, that is a “thermochemical clock”.
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