Synthetic Route of 14187-32-7, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 14187-32-7, Name is Dibenzo-18-crown-6, molecular formula is C20H24O6. In a Article£¬once mentioned of 14187-32-7
The Effects of Alkali Cation Complexation on the Fluorescence Properties of Crown Ethers
The effects of alkali metal complexation on the fluorescence properties of two crown ethers (a podand and a coronand) were investigated.Metal ion binding leads to changes in fluorescence intensity along with slight shifts in the emission maxima.This is attributed to a rigidization of the fluorophore and an interaction of the metal ion with non-bonding electrons of the crown ethers.The effects on the spectra are more pronounced in fluorescence than in absorption.Fluorescence titration with metal ions provides a simple and sensitive means for the determination of comp lexation constants, which were found to be highly dependent upon the water content of the methanol solution.Halide counterions, in particular iodide, act as dynamic fluorescence quenchers with Stern-Volmer constants that are different for the sodium and potassium complexes, respectively. – (Keywords: Complexation; Crown ether; Fluorescence; Solvent effects)
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 14187-32-7 is helpful to your research., Synthetic Route of 14187-32-7
Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare