Characterization of 2,(3)-tetra-(4-oxo-benzamide) phthalocyaninato cobalt (II)—Single walled carbon nanotube conjugate platforms and their use in electrocatalysis of amitrole

In this paper we report on the use of carboxylic acid functionalized single walled carbon nanotubes (SWCNT) in the synthesis of 2,(3)-tetra-(4-oxo-benzamide)phthalocyaninato cobalt (II)–single walled carbon nanotube conjugates (CoTOBPc–SWCNT), their characterization and application in the electrocatalytic oxidation of amitrole. Cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy were used for the detection of amitrole on the modified glassy carbon electrode. The catalytic rate constant was 1.6 × 103 M−1 s−1 and the apparent electron rate transfer constant was 1.5 × 10−5 cm s−1. The linear dynamic range was 1.0 × 10−6–3.0 × 10−5 M, with a sensitivity of ∼1.13 A mol−1 L cm−2.

Carboxylic acid functionalized single walled carbon nanotubes are linked to of 2,(3)-tetra-(4-oxo-benzamide)phthalocyaninato cobalt (II) and the resulting conjugate shows high sensitivity towards the detection of amitrole.Figure optionsDownload as PowerPoint slideHighlights
► The synthesis of Co phthalocyanine containing oxo-benzamide groups is reported.
► The complex is conjugated to single walled carbon nanotubes.
► The conjugates are used for detection of amitrole.
► The conjugates have a very good sensitivity for amitrole.