Preparation and characterization of positively charged ruthenium nanoparticles
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Characterization
Stable up to 523 K, the bis(dinitrogen) ruthenium and carbonyldinitrogen ruthenium complexes are formed by reaction of N2 with a carbonyl ruthenium species fixed on dealuminated Y zeolite [Eq. (a)]. A stable trans-dicarbonyldinitrogen ruthenium complex is also formed in the presence of CO at 300 K.
Molecular nitrogen
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На основе анализа обзорных РФЭ спектров образцов катализаторов 3%Ru/AlO и 3%Ru/СПС, до и после каталитического теста был установлен качественный и количественный элементный состав поверхности этих образцов. Состояния для катализатора 3%Ru/AlO до каталитического теста гидратированного рутения (IV) составил 23% и оксида рутения (IV) ± 45%, соответственно, и после ± гидратированного рутения (IV) составил 21% и оксида рутения (IV) ± 37%, соответственно. Состояния для катализатора 3%Ru/СПС до каталитического теста гидратированного рутения (IV) составил 29% и оксида рутения (IV) ± 3%, соответственно, и после ± гидратированного рутения (IV) составил 22% и оксида рутения (IV) ± 2%, соответственно. Based on the analysis of survey XPS spectra of 3%Ru/AlO and 3%Ru/HPS catalyst samples before and after the catalytic test, the qualitative and quantitative elemental composition of the surface of these samples was established. Conditions for the 3% Ru/AlO catalyst before the catalytic test of hydrated ruthenium (IV) was 23% and ruthenium (IV) oxide ± 45%, respectively, and after ± hydrated ruthenium (IV) was 21% and ruthenium (IV) oxide ± 37 %, respectively. Conditions for the catalyst 3% Ru/HPS before the catalytic test hydrated ruthenium (IV) was 29% and ruthenium (IV) oxide ± 3%, respectively, and after ± hydrated ruthenium (IV) was 22% and ruthenium (IV) oxide ± 2 %, respectively.
Ruthenium oxide
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The research described in this Ph.D. Thesis has been devoted to the design and development of polynuclear polypyridyl ruthenium and ruthenium-platinum complexes in search of new anticancer agents. A variety of polynuclear ruthenium and ruthenium-platinum complexes has been synthesized with a long and flexible linker. The complexes are characterized and have been studied for anticancer activity. The ruthenium unit of the dinuclear complexes varies in molecular structure, which may result in different interactions with DNA, the target of anticancer platinum and ruthenium antitumor compounds. The monofunctional ruthenium unit coordinates to the DNA-model base 9-ethylguanine. Variable temperature 1H NMR experiments prove that the base is hindered in its free rotation at room temperature. The crystal structure of a dinuclear ruthenium-platinum complex shows that the platinum unit is capable of intercalation and coordination (in)to DNA. Trinuclear and tetranuclear ruthenium and ruthenium-platinum complexes show higher activity than the dinuclear derivatives. A tetranuclear ruthenium complex displays interesting biological features. Human ovarian cisplatin sensitive carcinoma cells adhere together and form clots upon incubation of the complex. The effect possibly indicates antimetastatic activity. Dinuclear and trinuclear ruthenium-platinum complexes of short and semi-rigid linkers do not show significant activity against different cancer cell lines.
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Abstract A highly selective, sensitive, and rapid method has been developed for the spectrophotometric determination of ruthenium with 5-chloro-2-hydroxythiobenzhydrazide after extraction into molten naphthalene. Ruthenium was determined in the range 1.2–4.5 ppm. The complex was stable for more than 12 h with molar absorptivity of 1.516 × 104 L mol−1 cm−1 and detection limit of 0.0066 ppm. The method was found to be selective for ruthenium in the presence of a large number of diverse ions. Ruthenium was determined in various synthetic mixtures. The method permits the sequential separation and determination of ruthenium, osmium, and platinum from their mixtures.
Osmium
Molar absorptivity
Platinum group
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Dichloromethane
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Abstract The preparations of the title complexes (III), (V), and (VII) are described.
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The ruthenium complexes are known for their anticancer property. Some ruthenium complexes can bind with protein that may be related to the anticancer activity. The protein binding features of few ruthenium complexes have been analyzed to understand the amino acid selectivity within protein sequences. The docking, Molecular mechanics and QM/MM methods are used to predict the binding sites of these ruthenium complexes. The fluorinated ruthenium pyridocarbazole is a protein binding complex. The cis-chlorodimethylsulphoxide-S-bis(1,10-phenanthroline) ruthenium (II) chloride [RuN(B)], trichlorodimethylsulphoxide-S-(1,10-phenanthroline) ruthenium (III) [RuN(C)] and cis-dichlorotetrakis(dimethylsulphoxide) ruthenium (II) [RuN(D)] complexes can bind perfectly within fluorinated ruthenium pyridocarbazole is binding region. The complexes are found selective of certain amino acids, and the formation hydrogen bonds within the complex bonded region are found.
Docking (animal)
Ruthenium red
Phenanthroline
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