期刊
ELECTROANALYSIS
卷 28, 期 12, 页码 3019-3027出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201600379
关键词
Manganese Phthalocyanine; Electrografting; Click Chemistry; Electrocatalysis; Hydrazine
资金
- Department of Science and Technology (DST)
- National Research Foundation (NRF), South Africa through DST/NRF South African Research Chairs Initiative for Professor of Medicinal Chemistry and Nanotechnology [UID 62620]
- Rhodes University
- DST/Mintek Nanotechnology Innovation Centre (NIC) - Sensors, South Africa
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 mu A 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.
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