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1.
V. P. Kazakov A. I. Voloshin S. S. Ostakhov E. V. Zharinova 《Russian Chemical Bulletin》1998,47(3):386-393
Catalysis of decomposition of dispiro(diadamantane-1,2-dioxetane) (1) in the presence of EuIII and TbIII tris(benzoyltrifluoroacetonate) complexes (Ln(btfa)3) accompanied by the formation of adamantanone (2) and chemiluminescence (CL) was studied. The rate constants (k 2) of decomposition of compound1 in the1·Ln(btfa)3 complexes and their stability constants (K 1) have been determined. The Arrhenius parameters of decomposition of1 (E a= 22.4±0.7 kcal mol?1, logA=10.2±0.8 for1·Tb(btfa)3 andE a=23.4±0.6 kcal mol?1, logA=10.6±0.8 for1·Eu(btfa)3) and thermodynamic parameters of complex formation (ΔH=?5.5±0.5 kcal mol?1, ΔS=?10.4±0.7 e.u. for1·Tb(btfa)3 and ΔH=?5.8±0.5 kcal mol?1, ΔS=?10.9±0.7 e.u. for1·Eu(btfa)3) have been calculated from the temperature dependences ofk 2 andK 1. The yields of excitation of the Ln(btfa)3 chelates φ Eu * =0.021±0.006 and φ Tb * =0.12±0.04 have been determined. A higher efficiency of the occupation of the5D4-level of Tb3+ compared to those of the5D1- and5D0-levels of Eu3+ is caused by different efficiencies of the non-radiative energy dissipation in the Ln3+ ion after the intracomplex energy transfer from the3n,π*-state of2 to the resonance excited levels of lanthanides. 相似文献
2.
I. I. Ponomarev M. Yu. Zharinova Z. S. Klemenkova P. V. Petrovskii Z. A. Starikova 《Russian Chemical Bulletin》2011,60(3):512-520
The reaction of 1,8-naphthalic anhydride with 2-aminophenol afforded N-(2-hydroxyphenyl)-1,8-naphthalimide, which was then derivatized at the hydroxy group. 相似文献
3.
The thermodynamic and kinetic factors that determine the localization of carbon black particles at interfaces in polymer blends were established. Substantial differences in particle localization conditions at the interfaces of two high-molecular-mass or low-molecular-mass liquids were revealed; these differences are manifested in the determining effect of the sequence of mixing of the filler with the polymeric components of the blend on the localization. The effect is explained in terms of nonequilibrium positions of carbon black particles at the interface. This nonequilibrium distribution is primarily due to a high energy of desorption of macromolecules from the solid surface. 相似文献
4.
Kazantsev G. N. Orlova A. I. Zharinova M. V. Samoilov S. G. Pet'kov V. I. Kurazhkovskaya V. S. 《Russian Journal of Applied Chemistry》2004,77(3):369-375
A series of framework phosphates with varied ratio of cations Na5-2x
B
x
IIZr(PO4)3, BII = Mg, Ca, Sr, Ba (0 x 2) and Na5-3x
Fe
x
Zr(PO4)3 (0 x 1.33) were synthesized and studied under heating. The coefficients of thermal expansion along crystal axes
a
and
c
were calculated, and their dependences on the cationic composition (nature and concentration) and on the occupancy of out-of-framework structural positions were established. 相似文献
5.
Igor I. Ponomarev Ivan I. Ponomarev Yulia A. Volkova Marina Yu. Zharinova Dmitrii Yu. Razorenov 《Mendeleev Communications》2012,22(3):162-163
A new thermally stable polybenzimidazole film has been synthesized by nucleophilic aromatic substitution, transformed into a complex with phosphoric acid and tested as a proton-conductive membrane. 相似文献
6.
Orlova A. I. Pet'kov V. I. Zharinova M. V. Koryttseva A. K. Sukhanov M. V. Kazantsev G. N. Samoilov S. G. Kurazhkovskaya V. S. 《Russian Journal of Applied Chemistry》2003,76(1):12-16
Thermal expansion of niobium phosphates, new representatives of the family of structural analogs of [NaZr2(PO4)3], was studied. These compounds possess high thermomechanical stability because of the unique ability of their structure to expand-contract along different crystallographic directions under thermal treatment. 相似文献
7.
I. G. Trubach A. I. Orlova A. I. Beskrovnyi A. K. Koryttseva M. V. Zharinova V. S. Kurazhkovskaya E. V. Lipatova 《Crystallography Reports》2004,49(3):396-400
A new iron-niobium phosphate, Fe0.5Nb1.5(PO4)3, has been prepared and studied by X-ray diffraction, electron microprobe analysis, IR spectroscopy, and neutron powder diffraction. On the basis of X-ray powder data, it was found that the synthesized phosphate crystallizes into the sp. gr. R $\bar 3$ c and corresponds to the structural type of sodium-zirconium phosphate NaZr2(PO4)3. The structure was refined by the Rietveld method based on a powder neutron diffraction experiment. The obtained phosphate belongs to complex niobium orthophosphates and has a framework structure with a zero framework charge. 相似文献
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Synthesis and Characterization of Niobium-Bearing Members of the NZP and NbOPO 4 Structural Families
Vladimir Pet'kov Maxim Sukhanov Albina Orlova Maya Zharinova 《Phosphorus, sulfur, and silicon and the related elements》2013,188(6-7):1499-1501
Theoretically predicted by us, M 1/3 Nb 5/3 (PO 4 ) 3 (M = Mg, Mn, Co, Ni, Cu or Zn) compounds with the sodium zirconium phosphate (NZP) framework structure having no interstitial ions were synthesized. The rising of temperature above 900;C causes the change of chemical composition of NZP compounds and formation NbOPO 4 -like products. The phase formation regularities stated gave a possibility to choose optimal conditions for preparation of these phosphates. 相似文献