The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.14187-32-7, Name is Dibenzo-18-crown-6, molecular formula is C20H24O6. In a Article£¬once mentioned of 14187-32-7, name: Dibenzo-18-crown-6
Relationship between the Extractability and the Rate of Transfer of Potassium Ion by Macrocyclic Carriers in Liquid Membrane Systems
The relationship between the extractability and the rate of transfer of potassium ion by macrocyclic carriers was investigated in chloroform membrane systems.The rates of ion uptake, ion release, and ion transport and the liquid-liquid extraction constants were determined for a series of carriers (polynactin, dibenzo-18-crown-6, dicyclohexano-18-crown-6, and 18-crown-6).Kinetic equations for ion uptake and release are developed, and the apparent rate constants were calculated by introducing the experimentally determined extraction constants.The rate constants for the ion release and ion uptake are comparable to each other.For the four macrocyclic carriers employed, the rate of uptake was found to control the overall rate of transport through the liquid membrane.Both the rate of uptake and that of transport depend crucially on the extractability of the metal ion.A systematic analysis of each rate taking the constituent equilibria into account indicates that a macrocyclic ligand which forms a more stable complex with the metal ion and is less hydrophobic is preferable as a mobile carrier in liquid membrane systems.
The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 14187-32-7 is helpful to your research., name: Dibenzo-18-crown-6
Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare