Toggle Main Menu Toggle Search

Open Access padlockePrints

A ditopic receptor for cation binding and facilitated transport through a supported liquid membrane

Lookup NU author(s): Professor Andrew Benniston, Emeritus Professor Anthony Harriman

Downloads

Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Abstract

The binding properties of an artificial receptor towards a series of cations including Li+, Na+, K+, Mg 2+, Ca2+, Ba2+, Fe2+ and Al 3+ in acetonitrile are described. The receptor comprises a photo-responsive pyrene unit connected via a short spacer to a 2,2′:6′,2″-terpyridine metal ion binding site. Interaction of cations with the receptor was monitored by changes in absorption profile and the association constants calculated for 1:1 and 1:2 cation:ligand binding fall within the range log β = 3-12. The receptor is highly fluorescent and quenching of the emission is observed upon cation binding. The potassium picrate transport properties of the membrane-bound receptor are also described. This receptor when immobilised in a polymer support, which separates two aqueous solutions, has been shown to transport potassium ions in the dark with a flux rate of 1.5 × 108 mol/s m2. In contrast, when the membrane-bound receptor is selectively illuminated with light (λ > 400 nm), the flux increases to 2.0 × 108 mol/s m2. The transport efficiency depends on the nature of the trap used in the receiver phase. © 2005 Elsevier B.V. All rights reserved.


Publication metadata

Author(s): Benniston AC, Harriman A, Lawrie DJ, Mehrabi M, Russell OD

Publication type: Article

Publication status: Published

Journal: Inorganica Chimica Acta

Year: 2005

Volume: 358

Issue: 12

Pages: 3483-3490

Print publication date: 01/08/2005

ISSN (print): 0020-1693

ISSN (electronic): 1873-3255

Publisher: Elsevier

URL: .http:dx.doi.org/10.1016/j.ica.2005.04.020

DOI: 10.1016/j.ica.2005.04.020


Altmetrics

Altmetrics provided by Altmetric


Actions

Find at Newcastle University icon    Link to this publication


Share