The Facilitated Ion-Transfer of Lauryltrimethyl and Hexadecyltrimethylammonium Cations by Dibenzo Crown Ethers across the Water | 1,2-Dichloroethane Interface

The transfer of lauryltrimethylammonium (LTA+) and hexadecyltrimethyl-ammonium (HTA+) cations facilitated by dibenzo-15-crown-5 (DB15C5), DB18C6 and DB21C7, from aqueous phase to 1,2-dichloroethane (DCE) phase were studied. In the presence of DB15C5, ambiguous wave was observed which became somewhat...

Full description

Saved in:
Bibliographic Details
Published in:Chemistry letters 1999-10, Vol.28 (10), p.1059-1060
Main Authors: Bakshi, Mandeep Singh, Doe, Hidekazu, Sakurada, Norio, Arakawa, Ryuichi
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The transfer of lauryltrimethylammonium (LTA+) and hexadecyltrimethyl-ammonium (HTA+) cations facilitated by dibenzo-15-crown-5 (DB15C5), DB18C6 and DB21C7, from aqueous phase to 1,2-dichloroethane (DCE) phase were studied. In the presence of DB15C5, ambiguous wave was observed which became somewhat prominent in the presence of DB18C6 and then irreversible in the presence of DB21C7. Such waves have been attributed to the facilitated transfer of LTA+ and HTA+ cations across the interface in the form of surfactant ion-crown ether (CR) complexes. On the basis of electrospray ionization mass spectroscopy (ESI-MS) measurements, the stoichiometry of such a complex has been proposed to be 1:1. It has also been observed by interfacial tension (γ) measurements that the facilitated transfer becomes irreversible once the immiscible interface is fully occupied by the adsorption of amphiphilic surfactant monomers.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.1999.1059