Facilitated Transport of Hydrophilic Salts by Mixtures of Anion and Cation Carriers and by Ditopic Carriers
| Autor: | Stefano Sivelli, Feike de Jong, Rocco Ungaro, Lysander A. J. Chrisstoffels, A. Casnati, Licia Gazzola, David N. Reinhoudt |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
chemistry.chemical_classification
Organic cation transport proteins Facilitated diffusion biology Extraction (chemistry) Inorganic chemistry Salt (chemistry) General Chemistry Biochemistry Fick's laws of diffusion Catalysis Ion Colloid and Surface Chemistry Membrane chemistry Phase (matter) biology.protein |
| Zdroj: | Journal of the American Chemical Society, 121(43), 10142-10151. American Chemical Society |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/ja991588g |
| Popis: | Anion transfer to the membrane phase affects the extraction efficiency of salt transport by cation carriers 1 and 3. Addition of anion receptors 5 or 6 to cation carriers 1, 3, or 4 in the membrane phase enhances the transport of salts under conditions in which the cation carriers alone do not transport salt. The extraction of salt by the carrier mixtures is larger than by cation or anion carrier only, but the rate of diffusion is lower. Ditopic receptors 8 and 9 transport CsCl or KCl much faster than monotopic anion receptor 7 or cation receptors 1 and 2. The faster transport is due to a higher extraction constant Kex despite a lower diffusion constant of the ditopic salt complex |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|