Potentiometric studies of binary and ternary complexes involving cadmium(II) and nitrilo-tris(methyl phosphonic acid) with amino acids, peptides and DNA constituents

Azza A Shoukry; Mohamed M Shoukry

doi:10.1002/adic.200790057

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Journal article

Potentiometric studies of binary and ternary complexes involving cadmium(II) and nitrilo-tris(methyl phosphonic acid) with amino acids, peptides and DNA constituents

Azza A Shoukry and Mohamed M Shoukry

Annali di chimica, Vol.97(8), pp.733-745

01/08/2007

DOI: https://doi.org/10.1002/adic.200790057

PMID: 17899886

Abstract

Amino Acids - chemistry

Cadmium - chemistry

Chelating Agents - chemistry

DNA - chemistry

Hydrogen-Ion Concentration

Organophosphorus Compounds - chemistry

Peptides - chemistry

Potentiometry - methods

The complexing properties of nitrilo-tris(methylphosphonic acid) (NTP) with cadmium(II) were investigated pH-metrically at 25 degrees C and at ionic strength of 0.1 mol dm(-3) (NaNO3). Stoichiometry and stability constants for the complexes formed are reported. Cadmium (II) forms Cd(NTP)(4-) and the corresponding hydroxy complexes. The ternary complexes are formed in a stepwise mechanism whereby NTP binds to cadmium(II), followed by coordination of amino acids, peptides or DNA. The concentration distribution of the various complex species has been evaluated.

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Title: Potentiometric studies of binary and ternary complexes involving cadmium(II) and nitrilo-tris(methyl phosphonic acid) with amino acids, peptides and DNA constituents
Creators - without role: Azza A Shoukry - Cairo University
Mohamed M Shoukry
Publication Details: Annali di chimica, Vol.97(8), pp.733-745
Identifiers: 9916712708331
Academic Unit: Islamic University of Al Madinah
Language: English
Resource Type: Journal article