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Electrode Modification Using Alkynyl Substituted Fe(II) Phthalocyanine via Electrografting and Click Chemistry for Electrocatalysis
Author(s) -
Nxele Siphesihle Robin,
Mashazi Philani,
Nyokong Tebello
Publication year - 2015
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/elan.201500212
Subject(s) - azide , chemistry , electrocatalyst , alkyne , cycloaddition , electrochemistry , hydrazine (antidepressant) , phthalocyanine , click chemistry , inorganic chemistry , electrode , photochemistry , glassy carbon , catalysis , polymer chemistry , cyclic voltammetry , organic chemistry , chromatography
In this work, tetrakis(5‐hexyn‐oxy)Fe(II) phthalocyanine was synthesised in order to perform a click reaction between the terminal alkyne groups and an azide group on a glassy carbon electrode (GCE) surface. An azide group was formed on the electrode surface following electrografting using 4‐azidobenzene diazonium tetrafluoroborate by electrochemical reduction. The Cu(I) catalyzed alkyne‐azide Huisgen cycloaddition reaction was then employed in order to react the terminal alkyne groups on the phthalocyanine with the azide groups on the GCE surface. The modified electrode was employed to catalyse the oxidation of hydrazine. The electrode showed good electrocatalytic ability towards the detection of hydrazine with a sensitivity of 15.38 µA mM −1 and a limit of detection of 1.09 µM.