Electrocatalytic Properties of Metal Phthalocyanine Tetrasulfonate Intercalated in Metal Layered Simple Hydroxides (Metal: Co, Cu, and Zn)

Abstract

A series of hybrid metal (Zn, Cu, and Co) layered simple hydroxides (LSH) functionalized by surfactants, namely, dodecylsulfonate (DS 0 ) or dodecylsulfate (DS − ) and by tetrasulfonato metal (Cu, Co)-phthalocyanines, was synthesized by anionic exchange reactions and characterized by ancillary techniques. The electrochemical properties of these compounds were investigated by cyclic voltammetry in phosphate buffer solutions over a wide potential range including that suitable for oxygen reduction. The electroactivity of intralayer metal cations (Cu and Co) was evidenced as a function of the phosphate buffer pH. The redox properties of Co-and Cu-PcTS 0 grafted in LSH (Zn, Co, and Cu) were also investigated in neutral pH solution, under argon, air, or O 2 atmospheres. Interestingly, these hybrid compounds display an electrocatalytic behavior toward the reduction of oxygen. In particular with CoPcTS 0 -LSH, a sharp electrocatalytic reduction wave is observed at −0.40 V/ Ag-AgCl with an intensity that depends on the oxygen concentration. The formation of a CoPc-O 2 grafted species in the presence of oxygen was confirmed by electron paramagnetic resonance spectroscopy.

Synergistic Assembly of Peptide-Metal Hydroxide Hybrid Nanostructures for Electrochemical Capacitors

“…For the peptide/Zn(OH) 2 hybrid marix in which metal cation (Zn 2 + ) is electrochemically silent, no peak is ovserved in cyclic voltammetric experiments. [71] In summary, the present results describe that peptide/metal hydroxide hybrid films is successfully deposited using potentiodynamically mode of electrodeposition which is further confirmed by excellent electrochemical capacitive behaviour of nanostructured hybrid thin films.…”

Multicopper Laccase Mimicking Nanozymes with Nucleotides as Ligands

“…To solve these problems, efforts have been made to mimic laccases using various copper ligands, such as porphyrins, 4,5 phthalocyanine, 6,7 and imidazole. 8−10 However, most of these complexes contain only one or two copper ions, while natural laccases have four.…”

Amino-Functionalized Lead Phthalocyanine-Modified Benzoxazine Resin: Curing Kinetics, Thermal, and Mechanical Properties

“…The benzoxazine characteristic absorption bands at 1489 ( ortho -disubstituted benzene), 1336 (CH 2 wagging), 1226 (asymmetric stretching of C–O–C), 1156 (asymmetric stretching of C–N–C), and 1038 cm −1 (symmetric stretching of C–O–C) was observed in the neat P-ddm resins and P-ddm/APbPc blend. The bending vibration of C–H located at 941 cm −1 was due to the characteristic mode of benzene with an attached oxazine ring [24,34,55]. For P-ddm/APbPc, we could also see the stretching vibrations of N–H at 3352 and 3282 cm −1 and skeleton vibrations of the phthalocyanine ring at 1096 and 1014 cm −1 besides the characteristic modes of oxazine ring [56].…”

“…The phthalocyanine (Pc) compound is a kind of organic dye with extraordinary physicochemical properties, photochemical stability, and complex aggregation behavior. Pc constitutes a group of heterocyclic compounds with four isoindole-class [(C 6 H 4 )C 2 N] units linked by four N atoms to form a conjugated macrocyclic chain, a number of Pc are modified in the center with various metal elements, including Cu, Zn, Pb, etc., and substituted in the periphery with various groups [34,35,36,37]. Metal phthalocyanine has been widely used in optical, conducting, and magnetic materials; dye-sensitized solar cells; organic thin-film transistors; organic light-emitting devices; fuel cells; catalysis; sensors; and photodynamic therapy [38,39,40].…”