Complexation of Thallium(I) with Adenosine 5′-Monophosphate in Aqueous Methanol Solutions

The formation constants of the species formed in the systems H+ + thallium(I) + AMP and H+ + AMP have been determined in aqueous solutions of methanol at 25°C and constant ionic strength 0.1 mol dm-3 sodium perchlorate, using spectrophotometric and potentiometric techniques. Thallium(I) forms two mo...

Full description

Saved in:
Bibliographic Details
Published in:Analytical Sciences 2005, Vol.21(8), pp.945-949
Main Authors: GHARIB, Farrokh, KHERADMAN, Tahereh, AMANI, Parisa
Format: Article
Language:English
Subjects:
Adenosine Monophosphate - chemistry
Methanol - chemistry
Molecular Structure
Thallium - chemistry
Water - chemistry
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 formation constants of the species formed in the systems H+ + thallium(I) + AMP and H+ + AMP have been determined in aqueous solutions of methanol at 25°C and constant ionic strength 0.1 mol dm-3 sodium perchlorate, using spectrophotometric and potentiometric techniques. Thallium(I) forms two mononuclear 1:1 complexes with AMP of the type TlHL and TlL- in the pH range of study (1 - 11), where L2- represents the fully dissociated ligand. The formation constants in various media were analyzed in terms of Kamlet and Taft's parameters. Single-parameter correlation of the formation constants, β111 and β101, versus α (hydrogen-bond donor acidity), β (hydrogen-bond accepter basicity), and for π* (dipolarity/polarizability) are relatively poor in all solutions, but multi-parameter correlation represents significant improvement with regard to the single-parameter models. Finally, the results are discussed in terms of the effect of the solvent on complexation.
ISSN:0910-6340
1348-2246
DOI:10.2116/analsci.21.945