Surface electrochemistry of iron phthalocyanine axially ligated to 4-mercaptopyridine self-assembled monolayers at gold electrode: Applications to electrocatalytic oxidation and detection of thiocyanate

Heterogeneous electron transfer kinetics and electrocatalytic behaviour of mixed self-assembled ferrocenes and SWCNT layers

“…This pH condition was chosen for this experiment as it is well known to enhance the detection of thiocyanate. [47][48][49] The catalytic behaviour (in terms of onset potential) follows this trend: bare Au (0. obtained before. 20 The detection limit was of B1 mM.…”

Insights into the surface and redox properties of single-walled carbon nanotube—cobalt(II) tetra-aminophthalocyanine self-assembled on gold electrode

“…Self-assembly represents a more efficient technique for fabricating electrodes based on CNT [8], [12] and [13] or MPc [14], [15], [16], [17], [18], [19] and [20] thin films compared to such other thin film formation methodologies such as drop-dry and spin coating.…”

“…The formation of self-assembled monolayers (SAMs) of organomolecules on gold surfaces has continued to attract considerable research interests due to their crucial importance in biology, chemistry and supramolecular nanotechnology. SAMs have been known to offer convenient model systems for probing the interfacial electron-transfer processes [24], [25], [26] and [27], and have been extensively studied in corrosion protection [24], [25], [26], [28] and [29], fabrication of electrochemical-and bio-sensors [15], [17], [18], [19], [20], [30], [31], [32] and [33] and molecular electronic devices [34] and [35].…”

“…When the molecular building blocks for SAMs are redox-active, as in this work, electrochemical techniques (notably cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS)) unlike other surface techniques provide more powerful insights into the surface coverage of the individual components, their adsorption strengths, chemical reactivities with redox probes and redox-active analytes, etc. [17], [18], [19], [20], [25], [42], [43], [44], [45] and [46]. Hence, in this work, we employed…”

Self-Assembly Process of Flatly Adsorbed Porphyrin Self-Assembled Monolayer on a Au(111) Surface Studied by ex situ Scanning Tunneling Microscopy and Electrochemical Reductive Desorption Measurements

“…The other strategy for the fabrication of the flatly adsorbed porphyrin SAM is by the axial ligation of a metallo-porphyrin to the SAM of an N-donor molecule, for example 4-mercaptopyridine, onto the gold surface. [43][44][45][46] A significant advantage of this strategy is that the complicated synthesis of thiol-porphyrin linked derivatives is unnecessary, however, the amount of the adsorbed porphyrin was too low because the coordinate bond is much weaker than covalent one. In order to achieve the flat adsorption and to construct a stable porphyrin molecular layer on the solid surface in order, in this study, we newly designed and synthesized a porphyrin derivative, which has 4 directly connected thiol groups to the meta position of the phenyl group attached to the porphyrin ring as a surface binding group, 5,10,15,20-tetra-(m-mercapto-p-methoxyphenyl) porphyrin (TMMPP), as shown in Fig.…”