Premium
Electrode Modification Using Alkyne Manganese Phthalocyanine and Click Chemistry for Electrocatalysis
Author(s) -
O'Donoghue Charles. S. J. N.,
Fomo Gertrude,
Nyokong Tebello
Publication year - 2016
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.201600379
Subject(s) - electrocatalyst , cyclic voltammetry , phthalocyanine , chemistry , x ray photoelectron spectroscopy , manganese , inorganic chemistry , glassy carbon , electrode , surface modification , electrochemistry , photochemistry , chemical engineering , organic chemistry , engineering
Abstract In this work, azidobenzene diazonium salt is grafted onto a glassy carbon electrode (GCE) followed by clicking of manganese tetrahexynyl phthalocyanine for the electrocatalysis of hydrazine. The GCE was first grafted via the in situ diazotization of a diazonium salt, rendering the GCE surface layered with azide groups. From this point, the 1,3‐dipolar cycloaddition reaction, catalyzed by a copper catalyst was utilized to ‘click’ the manganese tetrahexynyl phthalocyanine to the surface of the grafted GCE. This new platform was then characterized using cyclic voltammetry (CV), scanning electrochemical microscopy (SECM) and X‐ray photoelectron spectroscopy (XPS). Based on the cyclic voltammetry calibration curve of electrocatalysis for hydrazine, the clicked Mn phthalocyanine electrode proved to be an effective sensor with a sensitivity of 27.38 µA mM −1 and the limit of detection (LoD) of 15.4 pM which is a great improvement compared to other reported sensors for this analyte.