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Iakimov NP, Romanyuk AV, Grozdova ID, et al. Binding of chloroaurate to polytyrosine-PEG micelles leads to an anti-Turkevich pattern of reduction. Soft Matter. 2021;17(10):2711-2724doi: 10.1039/d0sm02259d.
Iakimov, N. P., Romanyuk, A. V., Grozdova, I. D., Dets, E. A., Alov, N. V., Sharanov, P. Y., Maksimov, S. V., Savilov, S. V., Abramchuk, S. S., Ksenofontov, A. L., Eremina, E. A., & Melik-Nubarov, N. S. (2021). Binding of chloroaurate to polytyrosine-PEG micelles leads to an anti-Turkevich pattern of reduction. Soft matter, 17(10), 2711-2724. https://doi.org/10.1039/d0sm02259d
Iakimov, Nikolai P, et al. "Binding of chloroaurate to polytyrosine-PEG micelles leads to an anti-Turkevich pattern of reduction." Soft matter vol. 17,10 (2021): 2711-2724. doi: https://doi.org/10.1039/d0sm02259d
Iakimov NP, Romanyuk AV, Grozdova ID, Dets EA, Alov NV, Sharanov PY, Maksimov SV, Savilov SV, Abramchuk SS, Ksenofontov AL, Eremina EA, Melik-Nubarov NS. Binding of chloroaurate to polytyrosine-PEG micelles leads to an anti-Turkevich pattern of reduction. Soft Matter. 2021 Mar 18;17(10):2711-2724. doi: 10.1039/d0sm02259d. PMID: 33533363.
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Soft Matter. 2021 Mar 18;17(10):2711-2724. doi: 10.1039/d0sm02259d.

Binding of chloroaurate to polytyrosine-PEG micelles leads to an anti-Turkevich pattern of reduction.

Soft matter

Nikolai P Iakimov, Andrey V Romanyuk, Irina D Grozdova, Elisabeth A Dets, Nikolai V Alov, Pavel Yu Sharanov, Sergey V Maksimov, Serguei V Savilov, Sergey S Abramchuk, Alexander L Ksenofontov, Elena A Eremina, Nikolay S Melik-Nubarov

Affiliations

  1. Chemistry Department, M. V. Lomonosov Moscow State University, Leninskiye Gory 1, bldg. 3, GSP-1, Moscow 119991, Russia. [email protected].
  2. School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, Birmingham, UK.
  3. Chemistry Department, M. V. Lomonosov Moscow State University, Leninskiye Gory 1, bldg. 3, GSP-1, Moscow 119991, Russia. [email protected] and Skobeltsyn Institute of Nuclear Physics, M. V. Lomonosov Moscow State University, Leninskiye Gory 1, bldg. 62, Moscow 119991, Russia.
  4. Chemistry Department, M. V. Lomonosov Moscow State University, Leninskiye Gory 1, bldg. 3, GSP-1, Moscow 119991, Russia. [email protected] and Department of Physics, M. V. Lomonosov Moscow State University, Leninskiye Gory 1, bldg. 2, GSP-1, Moscow 119991, Russia.
  5. Belozersky Institute of Physico-Chemical Biology, M. V. Moscow State University, Leninskiye Gory 1, bldg. 40, Moscow 119991, Russia.

PMID: 33533363 DOI: 10.1039/d0sm02259d

Abstract

Here we report formation of gold nanoparticles (GNPs) in micelles of polytyrosine-PEG copolymers that combine the properties of a reducer and a stabilizer. The size and properties of the GNPs were tailored by the excess chloroaurate over the copolymer. The latter quickly formed non-covalent complexes with HAuCl4 and then slowly reduced it to form GNPs. 3 Tyr residues are consumed by reduction of one mole of chloroaurate. The size of the GNPs was controlled by the [Tyr]/[Au(iii)] molar ratio. Small GNPs with D ≅ 8 nm were formed at [Tyr]/[Au(iii)] = 0.5-1.5. 90% of these small GNPs remained bound to the copolymer and could be stored in a lyophilized state. Such polypeptide-gold hybrid materials produced at [Tyr]/[Au(iii)] = 0.5 demonstrated high activity in the catalytic reduction of 4-nitrophenol by sodium borohydride. [Tyr]/[Au(iii)] = 5 led to the formation of large nanoplates (D ≅ 30-60 nm). Thus, in the polymer-based system the GNP size grew in line with the excess of the reducing agent in contrast to Turkevich synthesis of GNPs with citric acid, which also combines the functions of a stabilizer and a reducer. The difference results from the reduction of HAuCl4 in solution according to the Turkevich method and in the micelles of the amphiphilic polymer where the seed growth is limited by the amount of neighboring reducer.

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