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Determination of Stability Constants for Complexes of Ni(II) with Adenine and Guanine from Catalytic Linear Scan Voltammetric Currents
Author(s) -
Muñiz Álvarez Jesús L.,
García Calzón Josefa A.,
López Fonseca Juan M.
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200201)14:2<148::aid-elan148>3.0.co;2-6
Subject(s) - guanine , chemistry , ionic strength , hanging mercury drop electrode , catalysis , aqueous solution , kinetic energy , ionic bonding , ion , limiting , inorganic chemistry , electrochemistry , stability constants of complexes , electrode , analytical chemistry (journal) , voltammetry , chromatography , organic chemistry , mechanical engineering , nucleotide , biochemistry , physics , quantum mechanics , engineering , gene
The catalytic effects of adenine and guanine on the reduction of Ni(II) at the hanging mercury drop electrode were used to study the formation of complexes in the bulk of aqueous solutions at 25 °C and ionic strength 0.2 M. Complexation data were obtained from an analysis of the kinetic (catalytic) pure limiting currents, according to a method proposed previously. Values of 3.70 and 3.17 were determined for the logarithms of the stability constants corresponding to the formation of 1 : 1 complexes between Ni(II) – aquo ion and the neutral form of adenine and guanine, respectively.