Impedimetric and Microscopic Probes of the integrities of Self-Assembled Monolayers of Organosuphur-Metal Complexes
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Date
2016-08
Authors
Akinbulu, I.A.
Ogunbayo, T.B.
Modibane, K.D.
Gcineka, M.
Journal Title
Journal ISSN
Volume Title
Publisher
Ife Journal of Science
Abstract
Electrical and structural integrities of Self-assembled Monolayers (SAMs) of some organosulphur-metal
complexes, formed on polycrystalline gold disc electrode, were probed, using Electrochemical Impedance
Spectroscopy (EIS) and Atomic Force Microscopy (AFM) respectively. Values of relevant circuit elements in the
equivalent circuits, proposed to explain the physical electrochemistry of the cells, were a reflection of the
electrical conductivity of the SAM-modified gold electrodes. Electrical integrity of SAMs was influenced by
both the metal center and molecular identity of the substituent, attached to the ligand framework, in the
chemical modifier of interest. AFM images of the SAMs were indicative of their structural integrity. SAM
formed from organosulphur-metal complex containing diethylaminoethanethio substituent (4-SAM) was more
compact than those formed from organosulphur-metal complexes containing benzylthio substituent (1-3-
SAMs). This was typical of SAMs formed from alkanethio and alkylthio substituted metallophthalocyanine
complexes
Description
Keywords
Electrochemical Impedance Spectroscopy , Atomic Force Microscopy , Self-assembled Monolayer , Organosulphur-metal Complex , Metallophthalocyanine
Citation
Akinbulu, Adebayo & T Ogunbayo, B & Modibane, Kwena & And Gcineka, M. (2016). IMPEDIMENTRIC AND MICROSCOPIC PROBES OF THE INTEGRITIES OF SELF- ASSEMBLED MONOLAYERS OF ORGANOSULPHUR-METAL COMPLEXES 1 1 2 3. Ife Journal of Science. 18. 435-446.