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11.
Apparent two-dimensional behavior of TiO2 nanotubes revealed by light absorption and luminescence 总被引:1,自引:0,他引:1
Bavykin DV Gordeev SN Moskalenko AV Lapkin AA Walsh FC 《The journal of physical chemistry. B》2005,109(18):8565-8569
Optical absorption and photoluminescence (PL) properties of colloidal TiO(2) nanotubes, produced by the alkali hydrothermal method, were studied at room temperature in the range 300-700 nm. Nanotubes having an internal diameter in the range 2.5-5 nm have very similar optical properties, in contrast to the expected behavior for quasi-1-D systems. This is explained by the complete thermal smearing of all 1-D effects, due to the large effective mass of charge carriers in TiO(2), resulting in an apparent 2-D behavior of TiO(2) nanotubes. 相似文献
12.
An efficient method for the synthesis of 2-ferrocenyl-substituted quinoline-4-carboxylic acids via the reaction of acetyl- and 1,1′-diacetylferrocene with isatin under the conditions of the Pfitzinger reaction was developed. Starting from the obtained acids methyl esters, amides, N-methyl-N-methoxyamides, and oximes (at one of the free acetyl groups) of some of these compounds were synthesized. 相似文献
13.
Choosing the state of a spatially distributed system in calculating a spectrum of Lyapunov exponents
A. A. Koronovskii V. A. Maksimenko O. I. Moskalenko A. E. Khramov 《Bulletin of the Russian Academy of Sciences: Physics》2011,75(12):1585-1588
The problem of choosing the set of parameters that determine the state of a spatially distributed system when calculating
a spectrum of Lyapunov exponents is considered. The possibility of reducing the number of necessary quantities due to the
features of the employed mathematical model is discussed. The proposed method is successfully applied to a hydrodynamic model
of a Piers diode. 相似文献
14.
V. A. Moskalenko L. A. Dohotaru I. D. Cebotari 《Journal of Experimental and Theoretical Physics》2010,111(1):97-103
The diagram approach proposed many years ago for the strongly correlated Hubbard model is developed with the aim to analyze
the thermodynamic potential properties. A new exact relation between renormalized quantities such as the thermodynamic potential,
the one-particle propagator, and the correlation function is established. This relation contains an additional integration
of the one-particle propagator with respect to an auxiliary constant. The vacuum skeleton diagrams constructed from the irreducible
Green’s functions and tunneling propagator lines are determined and a special functional is introduced. The properties of
this functional are investigated and its relation to the thermodynamic potential is established. The stationarity property
of this functional with respect to first-order variations of the correlation function is demonstrated; as a consequence, the
stationarity property of the thermodynamic potential is proved. 相似文献
15.
1-Dimethylamino-3-ferrocenyl-3-oxoprop-1-ene was synthesized by the reaction of acetylferrocene with dimethylformamide dimethyl acetal. Its reactivity in the reactions with mononucleophilic (sodium salts of phenol, thiophenol, benzenesulfinate, diethylphosphorous acid) and binucleophilic reagents (hydrazine hydrate, hydroxylamine, amidines, 1,2-diaminobenzene, 2-aminophenol, 2-aminothiophenol) and methyl iodide was studied. As a result, we obtained new ferrocene-containing α-keto-unsaturated compounds and heterocycles of pyrazole, isoxazole, pyrimidine, and benzazepine series. In the reaction with CH3I formed ferrocenoylacetylene which in the presence of dicarbonyl-bis(triphenylphosphine)nickel catalyst easily trimerized to give a mixture of 1,2,4- and 1,3,5-triferrocenoylbenzene. 相似文献
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