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Highly Sensitive and Selective Amperometric Detection of Periodate at Glassy Carbon Electrode Modified with a Cyclometalated Iridium(III) Complex and Single‐Wall Carbon Nanotubes
Author(s) -
Shamsipur Mojtaba,
Roushani Mahmoud,
Mansouri Ghobad
Publication year - 2013
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201200146
Subject(s) - amperometry , chemistry , periodate , iridium , detection limit , glassy carbon , carbon nanotube , electrochemistry , iodide , electrode , inorganic chemistry , carbon fibers , nuclear chemistry , organic chemistry , nanotechnology , cyclic voltammetry , chromatography , catalysis , materials science , composite material , composite number
Single‐wall carbon nanotubes (SWCNTs) were used as an immobilization matrix to incorporate [Ir(ppy) 2 (phen‐dione)](PF 6 ) complex onto a glassy carbon electrode for the study of electrocatalytic reduction of periodate ion. Detailed preliminary electrochemical data for the Ir(III)‐complex in acetonitrile solution and for the modified GCE/SWCNTs/[Ir(ppy) 2 (phen‐dione)](PF 6 )/CGE are presented. The modified electrode was applied to selective amperometric detection of periodate through its electrocatalytic reduction to iodide at 0.200 V and pH 2.0. The use of amperometry resulted in two calibration plots over the concentration ranges of 1‐20 μM and 20‐450 μM, with a detection limit of 0.6 μM and sensitivity of 198 nA μM −1 .