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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Isakov V. P., Isakova V. G., Lyamkin A. I., Yunoshev A. S.
Заглавие : Thermal decay of platinum metal acetylacetonates on the detonation nanodiamond surface
Коллективы : Российский федеральный ядерный центр - Всероссийский научно-исследовательский институт экспериментальной физики, "Экстремальные состояния вещества. Детонация. Ударные волны", международная конференция (2013 ; 18-22 марта; Саров), International conference "Extreme states of substance. Detonation. Shock waves" (2013 ; march ; 18- 22; Sarov, Russia), Харитоновские тематические научные чтения (15; 2013 ; март ; 18-22; Саров)
Место публикации : Экстремальные состояния вещества. Детонация. Ударные волны, междунар. конф.: Сб. тез. докл. - Саров, 2013. - P.401-402
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mel'nikov A. M., Kononova O. N., Pavlenko N. I., Krylov A. S.
Заглавие : Ion exchange equilibria in simultaneous extraction of platinum(II, IV) and rhodium(III) from hydrochloric solutions
Место публикации : Russ. J. Phys. Chem. A: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 86, Is. 6. - P.1018-1024. - ISSN 0036-0244, DOI 10.1134/S0036024412060192
Примечания : Cited References: 24
Ключевые слова (''Своб.индексиров.''): platinum--rhodium--ionites--ion exchange equilibria--hydrochloric acid solutions--sorption
Аннотация: Regularities of sorption extraction of platinum(II, IV) and rhodium(III) by anion exchangers of various physical and chemical structure in the presence of hydrochloric media were studied. It is established that AM-2B, Purolite A 500, and Purolite S 985 ionites adsorb complex anions of platinum metals employing mixed mechanism. A high affinity of the studied anionites for the studied complex anions of platinum and rhodium is established.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kononova O. N., Duba E. V., Karplyakova N. S., Krylov A. S.
Заглавие : Ion-exchange extraction of platinum(II,IV) from chloride solutions in the presence of iron(III)
Место публикации : Russ. J. Phys. Chem. A: MAIK Nauka-Interperiodica / Springer, 2015. - Vol. 89, Is. 8. - P.1464-1470. - ISSN 0036-0244, DOI 10.1134/S0036024415080166. - ISSN 1531-863X
Примечания : Cited References: 28
Предметные рубрики: RHODIUM
Ключевые слова (''Своб.индексиров.''): platinum--iron--ionites--sorption--hydrochloric solutions--sorption
Аннотация: The sorption concentration of platinum(II,IV) in the presence of iron(III) is studied on new samples of domestically produced ionites of the CYBBER brand. In comparing the sorption and kinetic properties of the new ionites to those of sorbents of the Purolite brand studied earlier, the higher effectiveness of the former is demonstrated via the extraction of platinum(II,IV) ions from strongly and weakly acidic chloride solutions. It is found that the sorbed platinum ions can be completely separated from iron(III) ions through separate elution using 0.01-0.001 M HCl (iron ions) and a thiourea solution (80 g/L) in 0.3 M H2SO4 (platinum ions).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Isakova V. G., Isakov V. P., Lyamkin A. I., Zharikova N. V., Yunoshev A. S., Nemtsev I. V.
Заглавие : Surface modification of detonation nanodiamonds with platinum and palladium nanoparticles
Место публикации : Int. J. Chem. - 2015. - Vol. 7, No. 1. - P.1-9. - ISSN 1916-9698, DOI 10.5539/ijc.v7n1p1
Примечания : Cited References: 38
Ключевые слова (''Своб.индексиров.''): detonation-synthesized nanodiamond supports--platinum and palladium nanoparticles--combustion--chemical modific--dnd additional purification
Аннотация: Acetylacetonates of platinum group metals (M(acac)n, acac= CH3COCHCOCH3,n - oxidation state of metal) are the most suitable precursors for use in highly effective MOCVD (metal-organic chemical vapor deposition) processes because of their thermal properties, low price of initial ligand and accessible synthesis methods. In this study we have developed a simple, scalable inexpensive, MOCVD-like approach to the deposition of Pt and Pd nanoparticle dispersions on powder detonation nanodiamonds (DND) using combustion in air of powder mixtures of DND with Pt and Pd acetylacetonates. This one-step process requires no specialized apparatus, and is conducted at mild temperatures (180°C – 250°C). The substrate surface of DND initiates chemical thermal destruction of precursor and deposition of nanoparticle networks composed of constituent particles. DND-supported Pd and Pt nanoparticles with their loading being from 10 and 5wt. % were obtained the average of particle size 20-25 nm and 7-10nm decreases with decreasing the metal loading. For additional purification and disaggregation of the commercial detonation-synthesized nanodiamond (DNDcomm) the method of annealing of the powder mixtures DNDcomm with Na(acac) have been used. The purified diamond nanoparticulates (DND), as well as DNDcomm, Pt/DND and Pd/DND, were subjected to physicochemical characterizations, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) analysis.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Starkov A. K., Zamay T. N., Savchenko A. A., Ingevatkin E. V., Titova N. M., Kolovskaya O. S., Luzan N. A., Silkin P. P., Kuznetsova S. A.
Заглавие : Antitumor effect of arabinogalactan and platinum complex
Место публикации : Dokl. Biochem. Biophys.: MAIK Nauka-Interperiodica / Springer, 2016. - Vol. 467, Is. 1. - P.92-94. - ISSN 16076729 (ISSN), DOI 10.1134/S1607672916020046
Примечания : Cited References: 7. - This study was supported by the Ministry of Education and Science of the Russian Federation (agreement no. 14.607.21.0104). This study was performed using the shared-access equipment center of the Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences.
Аннотация: The article presents the results of investigation of antitumor properties of platinum–arabinogalactan complex. We showed the ability of the complex to inhibit the growth of Ehrlich ascites tumor cells. It is found that the distribution of the platinum–arabinogalactan complex is not specific only for tumor cells in mice. The complex was found in all tissues and organs examined (ascites cells, embryonic cells, kidney, and liver). The mechanism of action of the arabinogalactan–platinum complex may be similar to cisplatin as the complex is able to accumulate in tumor cells. © 2016, Pleiades Publishing, Ltd.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fedorov A. S., Sorokin P. B., Kuzubov A. A.
Заглавие : Ab initio study of hydrogen chemical adsorption on platinum surface/carbon nanotube join system
Место публикации : Phys. Status Solidi B. - 2008. - Vol. 245, Is. 8. - P.1546-1551. - ISSN 0370-1972, DOI 10.1002/pssb.200844155
Примечания : Cited References: 31
Предметные рубрики: WALLED CARBON NANOTUBES
MOLECULAR-DYNAMICS
ROOM-TEMPERATURE
STORAGE
ENERGY
THERMODYNAMICS
GRAPHITE
DENSITY
POINTS
Аннотация: The process of hydrogen chemical adsorption on platinum cluster/single wall carbon nanotube (CNT) join surfaces is modelled at various temperatures and pressures. For that, the adsorption energy of hydrogen atoms on surfaces of both platinum (111) plate and CNT (5,5) or (8,8) types is calculated by density functional theory with the PBE approximation. At various temperatures the hydrogen atom hopping rate on both platinum and CNT surfaces is calculated by the transition state theory. Furthermore the hydrogen hopping rate from the platinum surface to the attached nanotube is obtained by calculation of the total energy profile. It is proved that hydrogen atoms can migrate easily at the platinum surface at all temperatures, but at the CNT surface they can migrate beginning at 400-500 K. By calculation of chemical potentials of hydrogen in gas or on CNT or platinum cluster surfaces the equilibrium density of adsorbed hydrogen was calculated at different temperatures and pressures. It is established that for all temperatures in the range 300-900 K and for all pressures less than 500 bar, the hydrogen is dissociated and chemically adsorbed on the platinum surface very effectively, but surface site occupation by hydrogen on attached CNT surface is rather small. But if CNT vacancies are present in the tube structure and the temperature is lower then 450 K, hydrogen atoms can be adsorbed effectively enough on these vacancies. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vasilchenko D., Vorob'eva S., Tkachev S., Baidina I. A., Belyaev A., Korenev S., Solovyov L., Vasiliev A. D.
Заглавие : Rhodium(III) speciation in concentrated nitric acid solutions
Коллективы : Russian Foundation for Basic Research [16-03-00549 A]; Ministry for Education and Science of the Russian Federation
Место публикации : Eur. J. Inorg. Chem.: Wiley-VCH Verlag, 2016. - Vol. 2016, Is. 23. - P.3822-3828. - ISSN 1434-1948, DOI 10.1002/ejic.201600523. - ISSN 1099-0682(eISSN)
Примечания : Cited References:31. - This work was supported by the Russian Foundation for Basic Research (grant number 16-03-00549 A). D. V. thanks the Ministry for Education and Science of the Russian Federation for the award of a President of the Russian Federation for Young Scientists Fellowship.
Предметные рубрики: MAGNETIC-RESONANCE
FISSION PLATINOIDS
AQUEOUS-SOLUTIONS
PT-195 NMR
RH(III)
SPECTROSCOPY
CHEMISTRY
DISSOCIATION
PLATINUM(IV)
COMPLEXES
Ключевые слова (''Своб.индексиров.''): rhodium--nmr spectroscopy--nitrates
Аннотация: The interaction of rhodium(III) aqua ions with nitrate ions in 3–16 m nitric acid solutions has been studied by 103Rh and 15N NMR and Raman spectroscopy. The mononuclear complexes [Rh(H2O)6–n(NO3)n]3–n (n = 1–4) were found to be the only form of rhodium(III) existing in the solutions with the metal concentration in the range 0.2–1.3 m. The dynamics of the H2O → NO3– substitution process was studied at 80 °C. An increase in the average number of nitrate groups bonded to rhodium with increasing concentration of nitric acid was also determined. The fine crystalline salt Rb4trans-[Rh(H2O)2(NO3)4][Rh(NO3)6] was obtained by solvothermal concentration of the rhodium nitric acid solution on addition of rubidium nitrate. The structure of the salt was solved by the powder X-ray diffraction method, with monodentate coordination of nitrato ligands found for both the [Rh(NO3)6]3– and trans-[Rh(H2O)2(NO3)4]– anions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chudin O. S., Verpekin V. V., Vasiliev A. D., Rubaylo A. I.
Заглавие : Structure of a trinuclear μ3-vinylidene cluster CpMnFePt(μ3-C=CHPh)(PPh3)(CO)6
Место публикации : J. Struct. Chem. - 2017. - Vol. 58, Is. 3. - P.600-602. - ISSN 00224766 (ISSN), DOI 10.1134/S0022476617030234
Примечания : Cited References: 15
Ключевые слова (''Своб.индексиров.''): heterometallic clusters--iron--manganese--platinum--single crystal x-ray diffraction analysis--vinylidene complexes
Аннотация: The single crystal X-ray diffraction study of the heterometallic cluster CpMnFePt(μ3-C=CHPh)(PPh3)(CO)6 is performed. The crystallographic characteristics are as follows: a = 32.356(15) Å, b = 11.754(5) Å, c = 20.114(9) Å, β = 115.707(6)°, V = 6893(5) Å3, space group C2/c, Z = 8, dcalc = 1.741 g/cm3. The cluster molecule contains a bridging phenylvinylidene ligand coordinated to a metallic core in the form of a Mn–Fe–Pt chain (the Mn–Fe and Fe–Pt bond lengths are 2.6768(14) Å and 2.6280(11) Å respectively and the Mn⋯Pt distance is 3.6425(19) Å).
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Verpekin V. V., Vasiliev A. D., Kondrasenko A. A., Burmakina G. V., Chudin O. S., Pavlenko N. I, Zimonin, Dmitry V., Rubaylo, Anatoly I.
Заглавие : Chemistry of vinylidene complexes. XXIV. A new μ-vinylidene complex containing RePt core, and platinum-bound carbonyl ligand. Spectroscopic, structural and electrochemical study
Коллективы : Russian Academy of Sciences [V.44.1.7]; Krasnoyarsk Region Science and Technology Support Fund [3/15]
Место публикации : J. Mol. Struct. - 2018. - Vol. 1163. - P.308-315. - ISSN 0022-2860, DOI 10.1016/j.molstruc.2018.03.020. - ISSN 1872-8014(eISSN)
Примечания : Cited References: 45. - The reported study was funded by the State budget allocated to the fundamental research in the Russian Academy of Sciences in the framework of Project No. V.44.1.7 and was financially supported by Krasnoyarsk Region Science and Technology Support Fund (the junior scientists project no. 3/15).
Предметные рубрики: TRI-METAL COMPLEXES
RAY CRYSTAL-STRUCTURE
BRIDGING CARBENE
CARBYNE
Ключевые слова (''Своб.индексиров.''): rhenium--platinum--vinylidene complexes--heterometallic complexes--electrochemistry
Аннотация: The novel heterobinuclear μ-vinylidene complex [Cp(CO)2Re(μ-C=CHPh)Pt(PPh3)(CO)] (1) was isolated from the reaction mixture of [Cp(CO)2Re(μ-C=CHPh)Fe(CO)4] and Pt(PPh3)4 for the first time. Alternative high-yield synthetic approaches to 1 were developed including the reactions of [Cp(CO)2Re(μ-C=CHPh)Pt(PPh3)2] (2) with Co2(CO)8 and Rh(acac)(CO)2. The complex was characterized by IR and ¹H, ¹³C and ³¹P NMR spectroscopy, a molecular structure of 1 was determined by X-ray diffraction analysis. The electrochemical behavior of the new complex was studied by cyclic voltammetry at platinum or glassed carbon electrodes and by dc polarography at a dropping mercury electrode.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kononova O. N., Duba E. V., Medovikov D. V., Krylov A. S.
Заглавие : Ion-exchange sorption of palladium(II) from hydrochloric acid solutions in the presence of silver(I)
Место публикации : Russ. J. Phys. Chem. A. - 2018. - Vol. 92, Is. 10. - P.2053-2059. - ISSN 0036-0244, DOI 10.1134/S0036024418100138. - ISSN 1531-863X(eISSN)
Примечания : Cited References: 36
Предметные рубрики: PLATINUM-GROUP METALS
RECOVERY
COMPLEXES
CHLORIDE
PD(II)
Ключевые слова (''Своб.индексиров.''): palladium--silver--hydrochloric acid solutions--sorption--sorptive extraction
Аннотация: The sorptive extraction of palladium(II) chloride complexes in the presence of silver(I) chloride complexes from 2 and 4 M aqueous solutions of HCl with a series of Purolite anionites with different functional groups is studied. An anion exchange mechanism of sorption is identified from Raman spectroscopy data. Kinetic properties that are inherent to the investigated ionites and allow the elution of palladium(II) and silver(I) after their extraction in a dynamic mode are revealed.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Isakova V. G., Osipova I. V., Dudnik A. I., Cherepakhin A. V., Zharikova N. V., Nemtsev I. V., Volochaev M. N.
Заглавие : Decoration of carbon nanomaterial powders with dispersed platinum metal particles
Коллективы : Center for Shared Use of the Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences
Место публикации : Russ. J. Appl. Chem. - 2018. - Vol. 91, Is. 7. - P.1209-1216. - ISSN 1070-4272, DOI 10.1134/S1070427218070212. - ISSN 1608-3296(eISSN)
Примечания : Cited References: 22. - The study was performed with the support and equipment of the Center for Shared Use of the Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences.
Предметные рубрики: NANOPARTICLES
PALLADIUM
FULLERENE
ELECTRODE
NANOTUBES
OXIDATION
Ключевые слова (''Своб.индексиров.''): carbon nanomaterials--platinum metal nanoparticles--in situ one-step method
Аннотация: Carbon nanomaterials (fullerite, detonation nanodiamonds, Taunit, fullerenol, fullerene-containing black) were decorated with platinum group metal nanoparticles in situ in one step by low-temperature combustion (~250–270°С) of a powdered mixture of platinum metal acetylacetonate [Pt-M(асас)n, Pt-М = Pt(II), Pd(II), Rh(III), Ir(III), acac = CH3COCHCOCH3, n is the oxidation state of Pt-М] with carbon nanomaterials in air. As shown by thermal analysis, the process is based on thermal oxidative degradation of the organometallic complex, catalyzed by carbon nanomaterials, with oxidation (combustion) of the organic moiety and release of the metal into the condensed phase. The thermal process in an open system occurs in the glowing mode (210–250°С); the size of the nanoparticles formed is 7–30 nm. Under the conditions restricting the air access to the reaction mixture and free outflow of gaseous products formed by oxidation of acac ligands, the nanoparticle size decreases to 3–10 nm. The particle size depends on the metal amount in the initial powder mixture and on the support morphology.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Filatov E. Y., Zadesenets A. V., Komogortsev S. V., Plyusnin P. E., Chepurov A. A., Korenev S. V.
Заглавие : Study of Co x Pt 1-x nanoalloy formation mechanism via single-source precursors
Место публикации : Powder Diffr. - 2019. - Vol. 34, Suppl. S1. - P.S27-S31. - ISSN 08857156 (ISSN) , DOI 10.1017/S0885715619000162
Примечания : Cited References: 13. - This work was supported by the Russian Foundation for Basic Research (Grant nos. 17-03-00950 and 18-03-00777). Aleksei Chepurov acknowledges support of the state assignment project 0330-2016-0012.
Аннотация: This paper is devoted to the study of formation mechanism of metal solid solutions during the thermolysis of single-source precursors in Co–Pt systems with a wide range of superstructural ordering. It is shown that the thermal decomposition of [Pt(NH3)4][Co(C2O4)2(H2O)2]·2H2O salt in helium is critically different from that under hydrogen atmospheres. Thermal degradation under the helium atmosphere is followed by a gradual reduction of platinum and cobalt, and at each thermolysis temperature only one phase is present. At 380 °C an equiatomic Co0.50Pt0.50 solid solution is formed (a = 3.749 (4) Å, Fm−3m space group, V/Z = 13.17 Å3, crystallite size: 5–7 nm). When the precursor is decomposed under a hydrogen atmosphere, the process proceeds mainly through the simultaneous reduction of the platinum and cobalt atoms, and at each temperature section two metal phases are present. The formation of the close to equiatomic Co0.50Pt0.50 solid solution (a = 3.782 (4) Å, Fm−3m space group, V/Z = 13.52 Å3, crystallite size: 7–9 nm) occurs at 450 °C. The calculations of crystallite sizes are confirmed by transmission electron microscopy data.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Chudin O. S., Verpekin V. V., Kondrasenko A. A., Burmakina G. V., Piryazev D. A., Vasiliev A. D., Pavlenko N. I., Zimonin D. V., Rubaylo A. I.
Заглавие : Chemistry of vinylidene complexes. XXV. Synthesis and reactions of binuclear µ-vinylidene RePt complexes containing phosphite ligands. Spectroscopic, structural and electrochemical study
Место публикации : Inorg. Chim. Acta. - 2020. - Vol. 505. - Ст.119463. - ISSN 00201693 (ISSN), DOI 10.1016/j.ica.2020.119463
Примечания : Cited References: 56. - This work was conducted within the framework of the budget project AAAA-A17-117021310221-7 for Institute of Chemistry and Chemical Technology SB RAS using the equipment of Krasnoyarsk Regional Research Equipment Centre of SB RAS
Аннотация: Reactions of Cp(CO)2ReCCHPh with Pt[P(OR)3]4 (R = Pri, Et, Ph) gave binuclear μ-vinylidene complexes Cp(CO)2RePt(μ-CCHPh)[P(OR)3]2. Treatment of the previously synthesized Cp(CO)2Re(μ-CCHPh)Pt(PPh3)2 with triisopropylphosphite or triethylphosphite resulted in a stepwise substitution of PPh3 ligands, leading to the disubstituted Cp(CO)2RePt(μ-CCHPh)[P(OR)3]2 and monosubstituted Cp(CO)2RePt(μ-CCHPh)[P(OR)3](PPh3) (R = Pri or Et) species, while no triphenylphosphine ligand substitution in the reaction with P(OPh)3 occurs at all. The monosubstituted Cp(CO)2RePt(μ-CCHPh)[P(OR)3](PPh3) (R = Pri, Et, Ph) species were also obtained by reacting Cp(CO)2ReCCHPh with mixed-ligand complexes Pt(PPh3)3L (L = P(OPri)3, P(OEt)3, P(OPh)3). Reactions of Cp(CO)2RePt(μ-CCHPh)LL′ (L = L′ = P(OPri)3, P(OEt)3, P(OPh)3; L = P(OPri)3, P(OEt)3, P(OPh)3, L′ = PPh3) with Co2(CO)9 yield tricarbonyl vinylidene species Cp(CO)2RePt(μ-CCHPh)[P(OR)3](CO) (R = Pri, Et, Ph). The obtained compounds were characterized by IR and 1H, 13C, 31P NMR spectroscopy. The molecular structures of Cp(CO)2RePt(μ-CCHPh)[P(OPri)3]2, Cp(CO)2RePt(μ-CCHPh)[P(OPri)3](PPh3) and Cp(CO)2RePt(μ-CCHPh)[P(OPri)3](CO) were determined by X-ray diffraction study. The redox properties of the new complexes and their reactions of chemical oxidation were studied.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kononova O. N., Duba E. V., Efimova A. S., Ivanov A. I., Krylov A. S.
Заглавие : Ion exchange recovery of platinum(IV) from hydrochloric acid solutions in the presence of silver(I)
Место публикации : Russ. J. Phys. Chem. A. - 2020. - Vol. 94, Is. 4. - P.828-834. - ISSN 0036-0244, DOI 10.1134/S003602442004007X. - ISSN 1531-863X(eISSN)
Примечания : Cited References: 35
Предметные рубрики: GROUP METALS
SORPTION
PALLADIUM
RESINS
Аннотация: The ion exchange sorption of the platinum(IV) chloride complexes in the presence of silver(I) chloro complexes from 2 and 4 M aqueous solutions of hydrochloric acid is studied on Purolite anion exchangers with different functional groups. The high selectivity of the investigated sorbents with respect to platinum during its recovery from individual hydrochloric acid solutions and in the presence of silver chloride complexes is determined. Since the latter are in this case virtually not sorbed in the presence of platinum(IV), they can be separated at the stage of sorption. The excellent kinetic properties of the investigated anion exchangers are revealed, allowing platinum to be eluted after its separation from silver chloro complexes in a dynamic mode.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kononova O.N., Melnikov A.M., Borisova T.V., Krylov A. S.
Заглавие : Simultaneous ion exchange recovery of platinum and rhodium from chloride solutions
Место публикации : Hydrometallurgy. - 2011. - Vol. 105, Is. 3-4. - P.341-349. - JAN. - ISSN 0304-386X, DOI 10.1016/j.hydromet.2010.11.009
Примечания : Cited Reference Count: 46
Предметные рубрики: GROUP-METALS PGM
SEPARATION
CATALYST
ANION
ADSORPTION
EXTRACTION
CHEMISTRY
RESIN
Ключевые слова (''Своб.индексиров.''): platinum--rhodium--sorption--anion exchangers--chloride solutions--anion exchangers--chloride solutions--platinum--rhodium--sorption--ammonium thiocyanate--anion exchangers--basic parameters--chemical structure--chloride solutions--diffusion coefficients--distribution coefficient--exchange capacities--kinetic properties--noble metals--purolite--rhodium chloride--separation factors--sorption ability--work focus--ammonium compounds--chlorine compounds--desorption--hydrochloric acid--ion exchange--ion exchange resins--ions--platinum--platinum compounds--potassium hydroxide--precious metals--recovery--rhodium--sulfuric acid--thioureas--urea--rhodium compounds
Аннотация: This work focuses on the sorption recovery of platinum (II, IV) and rhodium (III) simultaneously present in chloride solutions, freshly prepared and stored over 3 months, on commercial anion exchangers with different physical and chemical structure. The sorption was carried out from solutions with 0.001-4.0 mol/L HCl. The initial platinum and rhodium concentrations in contacting solutions were 0.25-2.5 mmol/L Sorption and kinetic properties of the chosen anion exchangers were investigated and the basic parameters of exchange capacity, recovery, distribution coefficients, separation factors, process rate, diffusion coefficients and half-exchange times were calculated. It is shown that anion exchangers investigated possess high sorption ability to platinum and rhodium chloride complexes, which does not deteriorate in case of stored solutions. Desorption of platinum and rhodium from the resins investigated was carried out with hydrochloric acid (2 mol/L), thiourea (1 mol/L) in sulfuric acid (2 mol/L) or in potassium hydroxide (2 mol/L) as well as by ammonium thiocyanate (2 mol/L). It was shown that complete separation of platinum and rhodium can be carried out with 2 mol/L HCl on anion exchanger Purolite S 985, whereas 2 mol/L NH(4)SCN as an elution agent leads to complete separation of noble metals on anion exchangers Purolite S 985, Purolite A 500 and AM-2B. (C) 2010 Elsevier B.V. All rights reserved.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Antonova A.B., Chudin O.S., Pavlenko N.I., Sokolenko W.A., Rubaylo A.I., Vasiliev A. D., Semeikin O.V.
Заглавие : Chemistry of vinylidene complexes. XVIII. Synthesis and molecular structure of the novel trinuclear mu(3)-vinylidene complex CpReFePt(mu(3)-C=CHPh)(CO)(6)(PPh(3))
Место публикации : J. Organomet. Chem. - 2009. - Vol. 694, Is. 1. - P.127-130. - ISSN 0022-328X, DOI 10.1016/j.jorganchem.2008.08.037
Примечания : Cited Reference Count: 17. - Гранты: This work was supported by the Council of the Russian Federation President for Support of Young Scientists and Leading Scientific Schools (Project No. NSch-4137.2006.2) and the Krasnoyarsk Regional Science Foundation (Grants 10TS145 and 17G002).Финансирующая организация: Council of the Russian Federation President for Support of Young Scientists and Leading Scientific Schools [NSch-4137.2006.2]; Krasnoyarsk Regional Science Foundation [10TS145, 17G002]
Предметные рубрики: CLUSTERS
CRYSTAL
MNFEPT
Ключевые слова (''Своб.индексиров.''): vinylidene complexes--heterometallic clusters--rhenium--iron--platinum--crystal structure--crystal structure--heterometallic clusters--iron--platinum--rhenium--vinylidene complexes--atomic physics--atoms--bond length--chemical bonds--coordination reactions--crystal structure--iron compounds--nuclear magnetic resonance--nuclear magnetic resonance spectroscopy--platinum--quantum chemistry--rhenium--rhenium compounds--bond angles--co groups--double bonds--fe atoms--heterometallic--heterometallic clusters--pt atoms--trimetallic--vinylidene complexes--x-ray diffractions--platinum compounds
Аннотация: The interaction between Cp(CO)(2)RePt(mu-C=CHPh)(PPh(3))(2) (1) and Fe(2)(CO)(9) afforded the new heterometallic mu(3)-vinylidene cluster CpReFePt(mu(3)-C=CHPh)(CO)(6)(PPh(3)) (2). An X-ray diffraction study shows the complex 2 possesses a trimetallic Re-Fe-Pt chain core. The bond lengths are Re-Fe 2.8221(8), Fe-Pt 2.5813(8) angstrom; the Re center dot center dot center dot Pt distance is 3.3523(7) angstrom; the bond angle Re-Fe-Pt is 76.55(3)degrees. The mu(3)-C=CHPh ligand is eta(1)-bound to the Re and Pt atoms and eta(2)-coordinated to the Fe atom. The C=C bond length is 1.412(4) angstrom. The Pt atom is coordinated by the PPh(3) and CO groups. Complex 2 is characterized by the IR and (1)H, (13)C and (31)P NMR spectra. (C) 2008 Elsevier B.V. All rights reserved.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Antonova A.B., Chudin O.S., Pavlenko N.I., Sokolenko W.A., Rubaylo A.I., Vasiliev A. D., Verpekin V.V., Semeikin O.V.
Заглавие : Chemistry of vinylidene complexes
Место публикации : Russ. Chem. Bull. - NEW YORK: SPRINGER, 2009. - Vol. 58, Is. 5. - С. 955-963. - MAY. - ISSN 1066-5285, DOI 10.1007/s11172-009-0122-3
Примечания : Cited Reference Count: 35. - Гранты: This work was financially supported by the Krasnoyarsk Regional Science Foundation (Grants Nos. 10TS145 and 17G002), the Council on Grants at the President of the Russian Federation (Program for State Support of Leading Scientific Schools, Grant NSh-4137.2006.2), and the Presidium of the Russian Academy of Sciences (Program for Basic Research, Project No. 18.18).Финансирующая организация: Krasnoyarsk Regional Science Foundation [10TS145, 17G002]; Council on Grants at the President of the Russian Federation [NSh-4137.2006.2]; Presidium of the Russian Academy of Sciences [18.18]
Предметные рубрики: RAY CRYSTAL-STRUCTURE
MOLECULAR-STRUCTURE
PHENYLVINYLIDENE LIGANDS
BRIDGED COMPLEXES
TRANSITION-METALS
CARBONYL LIGAND
BINUCLEAR
DERIVATIVES
DINUCLEAR
RHENIUM
Ключевые слова (''Своб.индексиров.''): vinylidene complexes--heterometallic complexes--manganese--rhenium--palladium--platinum--ir and nmr spectroscopy--x-ray diffraction study--heterometallic complexes--ir and nmr spectroscopy--manganese--palladium--platinum--rhenium--vinylidene complexes--x-ray diffraction study
Аннотация: The reactions of Cp(CO)(2)Re=C=CHPh (2) with M(PPh(3))(4) (M = Pd, Pt) gave the mu-vinylidene complexes Cp(CO)(2)RePd(mu-C=CHPh)(PPh(3))(2) (3) and Cp(CO)(2)RePt(mu-C=CHPh)(PPh(3))(2) (1), respectively. The substitution of Ph(2)PCH(2)PPh(2) (dppm) for the PPh(3) ligands in 1 resulted in the formation of Cp(CO)RePt(mu-C(1)=C(2)HPh)(mu-CO)(dppm) (4). The structure of complex 4 has been determined by single-crystal X-ray diffraction analysis. The structural and spectroscopic characteristics of complexes 1, 3, and 4 were compared with the corresponding parameters of the manganese-containing analogs Cp(CO)(2)MnPd(mu-C=CHPh)(PPh(3))(2) (5), Cp(CO)(2)MnPt(mu-C=CHPh)(PPh(3))(2) (6) and Cp(CO)(2)MnPt(mu-C=CHPh)(dppm) (7).
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fedorov A.S., Sorokin P.B., Kuzubov A. A.
Заглавие : Ab-initio study of hydrogen chemical adsorption on the platinum surface/carbon nanotube join system
Место публикации : Physica status solidi B - Basic Solid State Physics. - 2008. - Vol. 245, № 8. - С. 1546-1551
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Verpekin V. V., Chudin O. S., Kondrasenko A. A., Burmakina G. V., Vasiliev A. D., Zimonin D. V., Rubaylo A. I.
Заглавие : Chemistry of vinylidene complexes—XXVII—new µ-vinylidene MnPt complexes with platinum-coordinated 1-adamantyl isocyanide ligand: spectroscopic, structural and electrochemical study
Место публикации : Transition Met. Chem. - 2022. - Vol. 47. Is. 7-8. - P.283-292. - ISSN 03404285 (ISSN), DOI 10.1007/s11243-022-00511-w
Примечания : Cited References: 46. - This work was conducted within the framework of the budget project 0287–2021-0012 for Institute of Chemistry and Chemical Technology SB RAS
Аннотация: New binuclear MnPt µ-vinylidene complexes Cp(CO)2Mn(µ-C=CHPh)Pt(CN–Ad)(L) [L=PPh3 (1a), P(OPri)3 (2a)] bearing a terminal platinum-coordinated 1-adamantyl isocyanide ligand were prepared by the treatment of Cp(CO)2Mn(µ-C=CHPh)Pt(CO)(L) [L=PPh3 (1b), P(OPri)3 (2b)] with CN-Ad. At the same time the reaction between Cp(CO)2Mn(µ-C=CHPh)Pt(L)2 [L=PPh3 (1c), P(OPri)3 (2c)] and CN-Ad did not proceed. The new complexes were characterized by IR and 1H, 13C, 31P NMR spectroscopy. The molecular structure of Cp(CO)2Mn(µ-C=CHPh)Pt(CN–Ad)[P(OPri)3] (2a) was determined by an X-ray diffraction study. The redox properties of the new complexes and their reactions of chemical oxidation were studied. An influence of the platinum-coordinated 1-adamantyl isocyanide ligand on the properties of the synthesized µ-vinylidene compounds 1a and 2a was revealed.
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