An organic-based pH oscillator
| Autor: | Stephen K. Scott, Klara Kovacs, Rachel E. McIlwaine, Annette F. Taylor |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Anions
Stereochemistry Inorganic chemistry Biophysics Chemistry Organic Gluconolactone Autocatalysis Hydrolysis chemistry.chemical_compound Glucose Oxidase Glycols Negative feedback Oscillometry medicine Sulfites Dehydration Physical and Theoretical Chemistry Methylene Positive feedback Kinetic model Chemistry Chemistry Physical Hydrogen-Ion Concentration medicine.disease Carbon Kinetics Models Chemical |
| Zdroj: | The journal of physical chemistry. A. 111(4) |
| ISSN: | 1089-5639 |
| Popis: | In a recent paper, we suggested that the acid- or base-catalyzed dehydration of a hydrated carbonyl compound provides a suitable foundation for an organic-based pH oscillator. Here we present the first experimental example of such an oscillator in a flow reactor, utilizing the base-catalyzed dehydration of methylene glycol as a source of positive feedback (OH- autocatalysis) coupled with the base-catalyzed hydrolysis of gluconolactone for negative feedback (H+ production). The large amplitude oscillations (between pH 7 and 10) are reproduced in a kinetic model of the reaction. Such experiments present new possibilities in the design of pH oscillators. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|