Electrocatalytic Oxidation and Determination of Cysteine at Oxovanadium(IV) Salen Coated Electrodes

Abstract

A transition metal complex, oxovanadium(IV) salen (where salen represents N,N -bis(salicylidene)ethylenediamine) is immobilized on glassy carbon (GC) electrodes and utilized for electrocatalytic oxidation of cysteine. In presence of oxovanadium(IV) salen, increased oxidation current is observed due to the effective oxidation of cysteine by the electrogenerated oxovanadium(V) salen species. The oxidation current linearly varies with the concentration of cysteine from 0.1 to 1.0 mM. The modified electrode has good sensitivity and low limit of detection. These properties make the oxovanadium(IV) salen as an effective electrocatalyst for the determination of cysteine.

Electrochemical behavior of hydroquinone and catechol at glassy carbon electrode modified by electropolymerization of tetraruthenated oxovanadium porphyrin

“…These characteristics are assigned to "RuCl 3 (dppb)" moiety, which is the key to the electropolymerization, and the vanadium ion, which is well known as an efficient electrocatalyst [43][44][45].…”

Electrochemical approaches based on micro- and nanomaterials for diagnosing oxidative stress

“…In addition to the direct measurement of CyS, a variety of platforms is available that are immobilized with CyS and detected oxidative stress parameters (H 2 O 2 or NO). Table 5 compares some more electrochemical sensors and biosensors reported for the measurement of CyS [146][147][148][149][150][151][152][153][154][155][156][157][158][159][160] while a more comprehensive list is given in SI (Table S5).…”

Spectral and thermal analysis study of some transition metal complexes derived from bis(2,2/-methylylidene phenol)diaminoethane

“…Bis(2,2 / -methylylidene phenol) diaminoethane(H 2 L) shown in figure I was prepared as reported elsewhere [20] . Stock solutions of Fe(II) , Fe(II),Co(II), Ni(II) and Cu(II) were prepared using (NH 4 3 and H 2 SO 4 ) were prepared by diluting the concentrated acids and were standardized using appropriate standard bases.…”

“…Bis(2,2 / -methylylidene phenol)diaminoethane its derivatives and transition metal complexes have played significant role in bioinorganic chemistry and applications [1][2] in catalysis and in electrocatalytic reactions [3][4][5], as oxidizing agent [6][7], as nanocomposite and nanoparticles [8][9], as corrosion inhibitor [10], in carbon capture for purifying the environment [11], as red phosphorescent light emitting diode (Ph OLEDs) [12] and as metallomesogens [13].…”