排序方式: 共有22条查询结果,搜索用时 156 毫秒
1.
2.
The problem of the existence of cylindrical surface plasmon polaritons on thin metal conductors is considered. A dispersion
relation is obtained and analyzed, the domain of existence of dispersion curve with a maximum is found, and parametric relations
are derived. 相似文献
3.
Z. A. Temerdashev Dzh. N. Konshina E. Yu. Logacheva V. V. Konshin 《Journal of Analytical Chemistry》2011,66(10):930-936
A novel thin-layer cellulose adsorbent bearing chemically immobilized thiosemicarbaside is synthesized. The adsorbent is used
for the preconcentration of cobalt(II), mercury(II), and cadmium(II) followed by their X-ray fluorescence quantification in
the concentrate. The physicochemical parameters of metal sorption are determined. 相似文献
4.
Optics and Spectroscopy - Properties of polycrystalline TiO2 films modified by magnetron sputtering of cobalt followed by pulsed photon-irradiation processing in air are investigated by methods of... 相似文献
5.
N. M. Logacheva V. E. Baulin E. N. Pyatova I. S. Ivanova A. Yu. Tsivadze 《Russian Journal of Coordination Chemistry》2009,35(9):648-656
Complexes of Co(II), Ni(II), Zn(II), and Cu(II) perchlorates and hexafluorophosphates with 4′-(4″-benzo-15-crown-5)oxy-2,2′:6′,2″-terpyridine
(L) [M(L)2](ClO4)2 · 3H2O and [M(L)2](PF6)2 · 2H2O were synthesized. The spectral criteria of ligand coordination through the terpyridine nitrogen atoms were established.
An assumption concerning the benzo-15-crown-5 conformation in the ligand molecule in the synthesized complexes was made. The
extraction and ion-selective properties of L were studied. 相似文献
6.
A. Yu. Chernyad’ev N. M. Logacheva A. Yu. Tsivadze 《Russian Journal of Inorganic Chemistry》2006,51(5):720-723
Cation-induced dimerization of nickel(II), platinum(II), and palladium(II) meso-tetra(benzo-15-crown-5)porphyrinates (Ni(II)TCP, Pd(II)TCP, and Pt(II)TCP) on treatment with potassium thiocyanate in a chloroform-methanol solution has been studied by electronic absorption spectroscopy. The formation of [{MTCP}2(K+)4](SCN?)4 in solution induces a hypsochromic shift of the Soret band and a bathochromic shift of the β-band with respect to their positions in the spectrum of MTCP. The equilibrium constants (K) for the 2MTCP + 4K+ = [{MTCP}2(K+)4] processes at 20°C are determined to be as follows: log K Ni(II)TCP = 27.31 ± 1.67, logK Pd(II)TCP = 27.16 ± 1.43, and logK Pt(II)TCP = 26.15 ± 1.56. 相似文献
7.
A. S. Sidorkin A. S. Sigov A. M. Khoviv O. B. Yatsenko V. A. Logacheva 《Physics of the Solid State》2002,44(4):774-778
This paper reports on the results of investigations into the phase transformations observed in Pb/Ti/Si and Ti/Pb/Si thin-film
heterostructures upon layer-by-layer magnetron sputtering of lead and titanium onto a single-crystal silicon substrate and
subsequent annealing in an oxygen atmosphere. It is shown that the dielectric properties of lead titanate films depend on
the order of sputtering of lead and titanium metal layers onto the surface of single-crystal silicon. The ferroelectric properties
are revealed in 3000-nm-thick lead titanate films prepared by two-stage annealing of the Pb/Ti/Si thin-film heterostructure
(with the upper lead layer) at T
1=473 K and T
2=973 K for 10 min. These films are characterized by the coercive field E
c=4.8 kV/cm and the spontaneous polarization P
s=16.8 μC/cm2. The lead titanate films produced by annealing of the Ti/Pb/Si thin-film heterostructure (with the upper titanium layer)
do not possess ferroelectric properties but exhibit properties of a conventional dielectric.
__________
Translated from Fizika Tverdogo Tela, Vol. 44, No. 4, 2002, pp. 745–749.
Original Russian Text Copyright ? 2002 by Sidorkin, Sigov, Khoviv, Yatsenko, Logacheva. 相似文献
8.
N. M. Logacheva V. E. Baulin A. Yu. Tsivadze T. V. Basova L. A. Sheludyakova 《Russian Chemical Bulletin》2008,57(7):1467-1476
Octa(benzo-15-crown-5)-substituted phthalocyanine and its complexes with d-metals (NiII, CoII, CuII, ZnII, and CdII) have been synthesized for the first time. The compounds were studied by UV—Vis spectroscopy, MALDI-TOF mass spectrometry,
NMR, ESR, IR spectroscopy, and Raman spectroscopy. The dependence of the spectral characteristics of the studied compounds
on the ion radius of the complexing agent was demonstrated.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1439–1447, July, 2008. 相似文献
9.
O. B. Akopova N. M. Logacheva V. E. Baulin A. Yu. Tsivadze 《Russian Journal of General Chemistry》2008,78(11):2118-2124
First calculation of molecular parameters (MP) of new octa-(benzo-15-crown-5)-substituted phthalocyanine derivatives and of its metallo complexes Zn(II), Ni(II) (Ib, Ic) is carried out. A prediction was made of the possible formation therefrom of metaphases, and for that purpose the synthesis of these compounds and investigation of their mesomorphic properties was performed. For compounds Ia-Ic the formation of high-temperature enantiotropic mesophases was established typical for discotic mesogenes, in good agreement with the prediction. Proceeding from the data on miscibility of 2,3,9,10,16,17,23,24-octa-[(4′-benzo-15-crown-5)-oxy]-phthalocyanine Ia with discotic mesogene 2,3,6,7,10,11-hexa(cyclohexanebenzoyloxy)triphenylene (II) displaying nematic mesomorphism the compound Ia was assigned to the group of nematic mesogenes and by the texture of the mixture to discotic mesogenes forming columnar type nematic phase (N Col). Convergence of the results of prediction and experimental data is about 83%. 相似文献
10.
V. A. Logacheva A. N. Lukin A. M. Khoviv 《Russian Journal of Inorganic Chemistry》2007,52(8):1201-1205
X-ray powder diffraction shows that a monoclinic WO2.90 film is formed during the thermal oxidation of 200-nm-thick magnetron-sputtered metallic tungsten on quartz substrates at T = 793 K. Temperature elevation to T = 840 K yields orthorhombic WO3 with preferred (001) orientation. Adsorption spectroscopy shows that these films have high transparency (~90%) in the wavelength range 450–900 nm, and interference is observed in the transparency range. Two types of transitions are discovered: indirect transitions with the energies E gi = 2.77 and 2.41 eV and direct transitions with the energies E gd = 5.49 and 4.82 eV for the oxide films formed at 793 and 840 K, respectively. The tendency toward the increase in the transition energy with increasing annealing temperature proves that the crystallinity and order of the film improve. 相似文献