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
IR spectroscopic study of scandium extraction from sulfuric acid by solid-phase extractants based on tributyl phosphate, di-2-ethylhexylphosphoric acid, dibenzo-18-crown-6, and their mixtures
Solid-phase extractants (TVEKS) containing tributyl phosphate (TBP, I), di-2-ethylhexylphosphoric acid (D2EHPA, II), dibenzo-18-crown-6 (DB18C6, III), and their mixtures were prepared. The extraction of scandium by these extradants from a sulfuric acid solution with a concentration of 6 mol/l was studied. It was found by IR spectroscopy that in the extraction of scandium by TVEKS-III the Sc3+ ions were incorporated into macrocycle cavities to form a host-guest complex. The extraction of scandium by TVEKS-I occurred by a hydration-solvation mechanism: [TBP¡¤H3O]x + [Sc(SO4)y]¡¤zHSO4 -. In the synthesis of TVEKS-II. the conformation of D2EHPA was changed because of a decrease in the water content without formation of chemical bonds between the extradant and the polymer matrix. Based on IR spectroscopic data, a conclusion on the cation-exchange mechanism of scandium extraction by TVEKS-II was drawn. In TVEKS-(III + II) and TVEKS-(III + I), the crown ether interacted with an organophosphorus compound to result in an antagonistic effect in the extraction of the metal ion.
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