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41.
T. G. Ermakova N. P. Kuznetsova G. F. Prozorova A. B. Arbuzov V. P. Talzi Yu. G. Kryazhev V. A. Likholobov 《Doklady Chemistry》2017,474(1):109-112
New copolymers containing reactive vinyltriazole units and polyvinylene blocks with conjugation system promising as materials with special electrical, physical, catalytic, and sorption properties have been prepared by the reaction of poly(vinyl chloride) with sodium salts of 1,2,4-triazole and 1,2,3-benzotriazole in a dimethylformamide medium. 相似文献
42.
O. B. Bel’skaya T. I. Gulyaeva A. B. Arbuzov V. K. Duplyakin V. A. Likholobov 《Kinetics and Catalysis》2010,51(1):105-112
The conversions of a mixture of platinum(IV) and palladium(II) chloro complexes in aqueous solution and on the γ-Al2O3 surface at 25–150°C are reported. Heat treatment can initiate interaction between the complexes, both dissolved and adsorbed.
The hydrolysis of the chloroplatinate ion is accelerated by the palladium chloro complex, whose composition remains unchanged. 相似文献
43.
44.
V. A. Semikolenov V. A. Likholobov G. Valentini G. Braca F. Ciardelli 《Reaction Kinetics and Catalysis Letters》1980,15(3):383-388
The structure of palladium acetate complexes with phosphinated polystyrene has been studied by IR and UV spectroscopy. The results indicate that on polystyrene both mono- and dinuclear palladium complexes are formed. The comparison of the catalytic properties of palladium complexes on phosphinated polystyrene with those of mono- and dinuclear complexes supported on silica confirmed the formation of dinuclear palladium complexes on polystyrene surface.
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45.
Timofeeva M. N. Matrosova M. M. Il'inich G. N. Reshetenko T. V. Avdeeva L. B. Kvon R. I. Chuvilin A. L. Budneva A. A. Paukshtis E. A. Likholobov V. A. 《Kinetics and Catalysis》2003,44(6):778-787
The adsorption of H3PW12O40 (HPA) from methanol solutions on mesoporous carbon supports (multiwall carbon nanotubes (CFC-3) and CFC modified with nitrogen atoms (N-CFC)) was studied. It was found that up to 10 wt % HPA was irreversibly adsorbed on the surface of CFC. This character of adsorption is indicative of the strong interaction of the adsorbate (HPA molecules) with coal surface groups (carboxylic, lactone, etc.) to form intermolecular hydrogen bonds with -electron interactions. It was found that N-containing surface centers affected the adsorption of HPA on N-CFC. The acid and catalytic properties of HPA/CFC systems in the esterification reaction of n-butanol with acetic acid were studied ([BuOH]/[HOAc] = 1 : 15 mol/mol; 80°C). It was found that the strength of proton centers, which was determined as proton affinity, decreased upon supporting HPA. The HPA/CFC-3 systems most actively catalyzed the reaction. The catalytic activity of HPA/N-CFC depended on the nature of N-containing groups at the support surface, and it decreased with concentration of pyridine-like structures. 相似文献
46.
N. I. Kuznetsova L. I. Kuznetsova N. V. Kirillova L. G. Detusheva V. A. Likholobov M. I. Khramov J.-E. Ansel 《Kinetics and Catalysis》2005,46(2):204-216
Cyclohexane, cyclohexene, and -pinene react with dioxygen in the liquid phase in the presence of catalysts based on platinum, heteropoly compounds (HPCs), metal-containing HPCs, and combinations of these components. In cyclohexane and -pinene oxidations occurring by an autooxidation mechanism at 160–170 and 80– 90°C, respectively, the catalysts serve to control free-radical processes. The simultaneous action of a Ru-containing phosphotungstate as a hydroperoxide decomposition catalyst and of a V-containing phosphotungstate as a scavenger of hydroxyl and alkoxyl radicals increases the cyclohexanol + cyclohexanone selectivity of cyclohexane oxidation without yielding a hydroperoxide. A Pt/C catalyst affords an increase in -pinene conversion in a fixed time. In combination with ammonia or tetrahexylammonium chloride admixtures, it retards side reactions and raises the yield of verbenol and verbenone, which are the most valuable products. During cyclohexane, cyclohexene, and -pinene oxidation with an O2-H2 mixture at room temperature, no free-radical chain reaction develops in the Pt-HPC system and reactive intermediates form and interact, involving the HPC, with hydrocarbons on the surface of the platinum catalyst. Analysis of reactivity and of the composition of substrate oxidation products suggests a mechanism for the conjugate oxidation of hydrocarbons in systems with various HPCs. In this mechanism, HPC composition determines, to a large extent, the nature of reactive intermediates, which may be peroxides or radicals bound to platinum or HPC. The properties of catalytic systems in oxidation with O2-H2 mixtures can be controlled by selecting an appropriate HPC as the modifying component.__________Translated from Kinetika i Kataliz, Vol. 46, No. 2, 2005, pp. 219–232.Original Russian Text Copyright © 2005 by N. Kuznetsova, L. Kuznetsova, Kirillova, Detusheva, Likholobov, Khramov, Ansel. 相似文献
47.
L. G. Detusheva M. A. Fedotov L. I. Kuznetsova A. A. Vlasov V. A. Likholobov 《Reaction Kinetics and Catalysis Letters》1996,59(2):367-374
[PW11O39]7– heteropolyanion (HPA) stabilizes Ti(IV) in aqueous solution at Ti:PW11 ratios from 1 to 12 and pH 1–3. Ti(IV) is completely precipitated under these conditions in the absence of HPA. Differential dissolution phase analysis, optical, IR,31P and17O NMR spectra show that one Ti(IV) ion is incorporated into the Keggin lattice. The other ions, most probably, are located on the HPA surface in the form of oligomeric hydroxo fragments: [PW11TiIVO40·Tin–1
IVOxHy]k–. Both types of Ti(IV) ions bind peroxo groups on interaction of the complex with H2O2. 相似文献
48.
N. I. Kuznetsova A. F. Danilyuk V. A. Likholobov Yu. I. Yermakov 《Reaction Kinetics and Catalysis Letters》1979,12(3):235-239
Data are reported on variations of the gas phase volume and product accumulation in ethylene oxidation by lithium nitrate in acetic acid solutions, catalyzed by palladium acetate. An assumption is made on the routes of nitrate ion reduction.
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49.
50.
L. I. Kuznetsova L. G. Detusheva N. I. Kuznetsov V. K. Duplyakin V. A. Likholobov 《Kinetics and Catalysis》2008,49(5):644-652
The liquid-phase oxidation of benzothiophene and dibenzothiophene by cumyl hydroperoxide in the presence of supported metal oxide catalysts was carried out in octane in an N2 atmosphere at 50–80°C. The cumyl hydroperoxide, benzothiophene, and dibenzothiophene conversions and the yield of sulfones were determined for catalysts of various natures. In the presence of MoO3/SiO2, the most efficient and most readily regenerable catalyst, the benzothiophene conversion was ~60% and the dibenzothiophene conversion was as high as 100% upon almost complete consumption of cumyl hydroperoxide. The influence of unsaturated and aromatic compounds (oct-1-ene, toluene) on the catalytic effect was studied. The kinetics of substrate oxidation and cumyl hydroperoxide decomposition and an analysis of the cumyl hydroperoxide conversion products suggested a benzothiophene and dibenzothiophene oxidation mechanism including the formation of an intermediate complex of the hydroperoxide with the catalyst and the substrate and its transformation via heterolytic and homolytic routes. 相似文献