Cyclobis(Paraquat-p-Phenylene)-Mediated Electrosynthesis of Silver Nanoparticles

Nasretdinova, G. R.; Fazleeva, R. R.; Yanilkin, A. V.; Gubaidullin, A. T.; Siraeva, E. T.; Mansurova, E. E.; Ziganshina, A. Yu.; Yanilkin, V. V.

doi:10.1134/s1023193523100117

Cited by 1 publication

(6 citation statements)

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“…8. The systems under study also show the same tendency as for the solutions of similarly obtained AgNPs: 24 the average value of the hydrodynamic diameter of the particles obtained by CBPQT 4+ -mediated reduction decreases after their separation and dispersion in ethanol. Usually, isolation and dispersion of the resulting NPs in ethanol led to an increase in the discussed value.…”

Section: Resultssupporting

confidence: 52%

“…This value is comparable to that previously obtained for a similar Ag@CBPQT 4+ nanocomposite. 24 Electrochemical properties of systems and electrosynthesis of nanocomposites.-The MeCN (50% vol. )-H 2 O/0.05 M Bu 4 NCl was chosen as the electrosynthesis medium, because it is in this medium a successful electrosynthesis of the Pd@CBPQT 4+ nanocomposite with a pseudorotaxane structure was carry out.…”

Section: Resultsmentioning

confidence: 99%

“…In all electrolyses, the amount of electricity theoretically calculated to obtain a solution with a final Au(I) concentration of 3.5 mM was passed, as in the case of the previously studied metals Pd and Ag. 23,24 The changes in color and state of the solutions during the electrolyses are shown in Fig. 5.…”

Section: Resultsmentioning

confidence: 99%

“…Replacing the metal with Ag decreased the interaction energy between the metal and the macrocycle by about 2 times, as shown by theoretical calculations. 24 This was reflected in the electrosynthesis results. No experimental evidence was found the formation of a similar nanocomposite with a pseudorotaxane structure.…”

mentioning

confidence: 94%

“…We have recently proposed a new class of organic-inorganic hybrid nanocomposites of MNPs with an electron-withdrawing macrocyclic compounds, that can adopt pseudorotaxane, polypseudorotaxane, rotaxane, and catenane structures. 23,24 The formation of such nanocomposites is made possible by the binding of an electrondonating metal particle inside the cavity of a macrocyclic compound by donor-acceptor interaction with acceptor units of the macrocycle. As a first example, the electrosynthesis of a nanocomposite of PdNP with cyclobis(paraquat-p-phenylene) (CBPQT 4+ ), which has the pseudorotaxane structure, has been carried out.…”

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confidence: 99%

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Mediated Electrosynthesis of Nanocomposites of Gold Nanoparticles with Cyclobis (paraquat-p-phenylene)

Nasretdinova,

Fazleeva,

Yanilkin

et al. 2024

ECS J. Solid State Sci. Technol.

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The result of cyclobis(paraquat-p-phenylene) (CBPQT4+) –mediated reduction of gold ions generated by anodic oxidation of metallic gold in MeCN (50% vol.) – H2O/0.05 M Bu4NCl medium in the absence and presence of such stabilizers as cetyltrimethylammonium chloride and polyvinylpyrrolidone is polydisperse aggregated composite nanoparticles with sizes ranging from several nm to 100 nm or more. The resulting AuNP@(CBPQT4+)n nanocomposite is a gold nanoparticle encapsulated in a shell of macrocycle molecules. CBPQT4+ is bound to the surface of the gold nanoparticle by donor-acceptor interactions between the electron-withdrawing viologen units and the electron-donating metal particle. Theoretical calculations suggest that the cavity of the bound macrocycle is not empty, but filled with 10-12 gold atoms. CBPQT4+ presumably forms a monomolecular layer on the metal surface, and its excess amount is involved in the aggregation and sedimentation of the nanocomposites. The encapsulation of AuNPs in the macrocyclic shell is the main reason for the suppression of the metal catalytic activity in the test reaction of p-nitrophenol reduction with sodium borohydride.

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Section: Resultssupporting

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 94%

mentioning

confidence: 99%

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