Nanoparticles оf Platinum(II) Oxo-Hydrocomplexes: Composition, Structure, Formation Mechanism Full article
Journal |
Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779 |
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Output data | Year: 2020, Volume: 61, Number: 11, Pages: 1709-1720 Pages count : 12 DOI: 10.1134/S0022476620110050 | ||||
Tags | nanoparticles, Pt(II), hydrolysis, EXAFS, SAXS, TEM, NMR, catalyst active centers | ||||
Authors |
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Affiliations |
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Funding (2)
1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2019-0003 |
2 | Ministry of Science and Higher Education of the Russian Federation | 0303-2019-0004 |
Abstract:
Formation, composition, and structure of nanoparticles of oxo-hydroxocomplexes (Pt(II)О-NPs) are studied with a number of physicochemical methods such as NMR, EXAFS, ТЕМ, SAXS, and UV spectroscopy. The obtained 195Pt, 133Cs, 17O NMR, and UV spectroscopy data are used as the basis to propose a mechanism of Pt(II)O-NP formation from K2PtCl4 aqueous solutions whose temperature and acidity effects on the reaction rate are also studied. The dimensional characteristics of obtained nanoparticles are studied by ТЕМ and SAXS. According to EXAFS data, the structure of freshly prepared Pt(II)О-NP samples is composed of PtCl2 fragments bridged by oxygen atoms. The Pt–O, Pt–Cl, and Pt…Pt distances are 2.01 Å, 2.31 Å, and 3.30 Å, respectively. In the course of NP aging, chloride ligands leave the composition of nanoparticles which are gradually acquiring a structure similar to that of PtO. It is established that the K2PtCl4:NaOH ratio equal to 1:1 is sufficient for mononuclear Pt(II) complexes to transform into the oligomeric state. A possibility to control the ratio of mono- and polynuclear Pt(II) compounds in solution is discovered.
Cite:
Troitskii S.Y.
, Belyakova O.A.
, Trigub A.L.
Nanoparticles оf Platinum(II) Oxo-Hydrocomplexes: Composition, Structure, Formation Mechanism
Journal of Structural Chemistry. 2020. V.61. N11. P.1709-1720. DOI: 10.1134/S0022476620110050 WOS Scopus РИНЦ
Nanoparticles оf Platinum(II) Oxo-Hydrocomplexes: Composition, Structure, Formation Mechanism
Journal of Structural Chemistry. 2020. V.61. N11. P.1709-1720. DOI: 10.1134/S0022476620110050 WOS Scopus РИНЦ
Original:
Троицкий С.Ю.
, Белякова О.А.
, Тригуб А.Л.
Наночастицы оксо-гидроксокомплексов платины(II): состав, структура, механизм образования
Журнал структурной химии. 2020. Т.61. №11. С.1804-1816. DOI: 10.26902/JSC_id63231 РИНЦ
Наночастицы оксо-гидроксокомплексов платины(II): состав, структура, механизм образования
Журнал структурной химии. 2020. Т.61. №11. С.1804-1816. DOI: 10.26902/JSC_id63231 РИНЦ
Dates:
Submitted: | Aug 14, 2019 |
Accepted: | May 22, 2020 |
Published print: | Nov 1, 2020 |
Published online: | Dec 25, 2020 |
Identifiers:
Web of science | WOS:000602179100005 |
Scopus | 2-s2.0-85097980838 |
Elibrary | 45062815 |
Chemical Abstracts | 2020:2696399 |
OpenAlex | W3116007346 |