SiO2/C/Cu(II)phthalocyanine as a biomimetic catalyst for dopamine monooxygenase in the development of an amperometric sensor

Mesoporous silica xerogel modified with bridged ionic silsesquioxane used to immobilize copper tetrasulfonated phthalocyanine applied to electrochemical determination of dopamine

“…It was also observed that the peak related to the dimeric species was shifted from 631 to 572 nm. These facts can be assigned to the confinement of the CuTsPc inside of the pores, leading to an increase in the intermolecular interaction [36,38] or to the distortion of the D 4h symmetry [49].…”

“…Among the anionic electroactive species, the metallophthalocyanines are well known for their excellent catalytic properties for several reactions [37], with high chemical and thermal stability [38]. They have been used in electrochemical sensors to detect analytes such as serotonin [39], dissolved oxygen [40], nitric oxide [41], cysteine [42], nitrite [43], oxalic acid [44], ascorbic acid [45,46], uric acid [46], phenols [47], and more specifically the dopamine [36,45,46,48,49].…”

Copper phthalocyanine modified SiO2/C electrode as a biomimetic electrocatalyst for 4-aminophenol in the development of an amperometric sensor

“…4-APh may be dangerous, which can cause teratogenic effect and nephrotoxicity. [21][22][23] The silica backbone, itself is electrochemically inactive, not only provides rigidity to the material, but the electroactive species can attach through physical entrapment or covalent and non-covalent binding, wherein the charge transfer occurs preferably by electron hopping. As a result, large amounts of 4-APh may be unavoidably released into the environment as a pollutant.…”

“…22 In these biomimetic sensors, a simple redox substance is immobilized on the electrode surface to act as the active center of an enzyme and catalyze the substrate reaction in the same way. 22 In these biomimetic sensors, a simple redox substance is immobilized on the electrode surface to act as the active center of an enzyme and catalyze the substrate reaction in the same way.…”

Mesoporous chitosan/silica hybrid material applied for development of electrochemical sensor for paracetamol in presence of dopamine

“…These hybrid materials should present suitable textural properties like high surface area and mesoporosity [11][12][13], which allow the immobilization of large molecules, other nanostrutured and electroactive species, like copper phthalocyanine-3,4′,4″,4′′′-tetrasulfonate (CuPc), giving more versatility in the applications The metallophthalocyanines are electroactive species, well known for their excellent catalytic properties for several reactions [14] which can be applied also to improve electrochemical characteristics of the material used to make the electrodes. They have been used in the preparation of electrochemical sensors to detect several analytes and also for the dopamine [15][16][17][18]. The CuPc electroactive species was not immobilized in mesoporous hybrid chitosan/silica yet.…”