Benzimidazo[1',2':1,2]Quinolino[4,3-b][1,2,5]Oxodiazolo[3,4-f]Quinoxaline—New Mediator for Electrosynthesizing Metal Nanoparticles

The two-step electrosynthesis of nanocomposites of Ag, Au, and Pd nanoparticles with iron(ii) oxide-hydroxide

“…PVP and CTAC are widely used 13,14,[17][18][19]45,47,48,[50][51][52][53][54][55][56] for the stabilization of MNPs in the solution bulk. Assuming possible stabilization and an increase in solubility of the iron oxidation products by these compounds, we studied the anodic dissolution of iron in their presence.…”

“…In the UV-VIS spectra of solutions with Ag and Au NPs (Fig. 8), two absorption bands are observed, corresponding to FeO-xFe(OH) 2 (g = 279-297 nm) and to surface plasmon resonance of MNPs [12][13][14][15][16][17][18][19][45][46][47][48][49][50][51]56 (l (Ag) = 357-429 nm; l (Au) = 389 nm) (Table 1).…”

“…Metal nanoparticles (MNPs) are effective catalysts for a variety of reactions. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] NPs of metal oxides also show catalytic activity in several reactions (oxidation, reduction, coupling, condensation, etc. ), [20][21][22][23] and they, in combination with MNPs, can act as active cocatalysts, [24][25][26][27][28][29][30][31][32] giving to the nanocomposite bifunctionality or synergistic effects.…”

“…The mediated electrosynthesis of MNPs, proposed and developed in our laboratory, turned out to be very effective in obtaining MNPs in the solution bulk. [13][14][15][16][17][18][19] The main idea of the method is to transfer the metal ion reduction process from the surface of the electrode into the solution bulk using mediators.…”

Electrochemical method for producing globules of ultrasmall rhodium nanoparticles with poly(N-vinylpyrrolidone) bound to the surface of nanocellulose fibers

“…Effi cient formation of an Ag@PVP/NC nanocomposite was observed in the course of electrosynthesis of monodisperse spherical Ag NPs (11±3 nm in size) in a DMF/0.1 M Bu 4 NBF 4 medium during benzimid azo-[1´,2´:1,2] quinolino [4,3-b] [1,2,5]oxodiazolo [3,4-f]quinoxaline (BIQOQ) mediated reduction of Ag + ions in the presence of PVP (40000 Da) and NC (d = 147±38 nm). 16 The synthesis proceeds quantitatively at the controlled potential of one-electron reduction of BIQOQ to its radical anion upon passage of a theoretical amount of electricity at room temperature. The nanocomposite can be readily isolated from the reaction mixture by centrifugation.…”