Optimizing the Electrocatalytic Activity of Surface Confined Co Macrocyclics for the Electrooxidation of Thiocyanate at pH 4

Abstract

We have studied the trends in catalytic activity of several Co macrocyclics confined on the surface graphite electrodes for the oxidation of thiocyanate. A plot of log i (at constant E) versus the formal potential of the catalyst gives a volcano correlation, indicating that the Co(II/I) redox potential needs to be tuned, in order to achieve maximum reactivity. Graphite electrodes modified with Co phthalocyanine at pH 4 exhibit linear amperometric response for thiocyanate concentration in the range 10 À7 and 10 À3 M. Theoretical calculations show that electrocatalytic activity (as log i at constant E) plotted versus the energy of the LUMO of the Co complex also gives a volcano correlation.

Study of the ZnIIComplexes of 1,1′‐Binaphthyl‐Based Schiff Bases: Fluorescent Detection of Thiocyanate

“…Irradiation and chlorination could convert SCN – to highly toxic cyanides with environmental and health hazards. Therefore, detection of SCN – is important in environmental, medicinal and life sciences …”

“…In addition, we have examined the effect of anions on the fluorescence of the Zn 2+ complexes of the Schiff bases. We have discovered that the two diastereomers show very different fluorescent response toward thiocyanate (SCN – ) and they can be used to detect this anion of environment and health significances . Previously, a number of methods have been developed for the detection of SCN – , including ion chromatography, gaschromatography/mass spectrometry, electrophoresis, electrochemistry, colorimetry,, UV absorption and fluorescence spectrometry .…”

Colorimetric Sensor for Thiocyanate Based on Anti-aggregation of Gold Nanoparticles in the Presence of 2-Aminopyridine

“…Therefore, the detection of SCNis of great significance. At present, conventional methods, such as colorimetry 1 , atomic absorption spectrometry 2 , flow injection analysis 3 , electrochemistry [4][5][6] , chromatography/mass spectrometry 7 , ion mobility spectrometry 8 , electrophoresis 9 , fluorimetry 10 , double-valve sequential injection analysis 11 and Surface Enhanced Raman Scattering (SERS) 12 , have been used to measure SCNwith high sensitivity and accuracy. However, these measures have many problems such as complicated instruments, difficult operation and long time.…”

Detection of thiocyanate through limiting growth of AuNPs with C-dots acting as reductant

“…6 Apparently, high concentrations of SCN − in milk products will increase the risk of goiter. Nowadays, many analytical methods have been proposed for the detection of SCN − , including gas chromatography/mass spectrometry, [7][8][9] high performance liquid chromatography, 10 electrochemistry, 11,12 electrophoresis, 13,14 surface-enhanced Raman scattering 15,16 and so on. However, some of these methods are time-consuming and costly or require sophisticated instrumentation and professional staff.…”