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Abstract  

Inclusion compounds (intercalates) of fluorinated graphite matrix with 1,2-dichloroethane (C2FxBrz·yC2H4Cl2, x=0.49, 0.69, 0.87, 0.92, z≈0.01) were synthesized by guest substitution from acetonitrile to dichloroethane. The kinetics of the thermal decomposition (the 1st stage of filling→the 2nd stage of filling) was studied under isothermal conditions at 289–313 K. The relationship between the structure of host matrices with thermal properties and kinetic parameters of inclusion compounds is discussed.

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Abstract  

Inclusion compounds (intercalates) of fluorinated graphite matrix with chloroform (C2FxBrz·yCHCl3, x=0.49, 0.69, 0.87, 0.92, z=0.01) were synthesized by guest substitution from acetonitrile to chloroform. The kinetics of the thermal decomposition (the 1st stage of filling → the 2nd stage of filling) was studied under isothermal conditions at 286–311 K. The relationship between the structure of matrices intercalates with thermal properties and kinetic parameters of inclusion compounds is discussed.

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Journal of Thermal Analysis and Calorimetry
Authors:
D. Pinakov
,
V. Logvinenko
,
Yu. Shubin
, and
G. Chekhova

Abstract  

Inclusion compounds (intercalates) of fluorinated graphite matrix with methylene dichloride (C2F x Br z ·yCH2Cl2, x = 0.49, 0.69, 0.87, 0.92, z ≈ 0.01) were synthesized by guest substitution from acetonitrile to methylene dichloride. The kinetics of the thermal decomposition (the first stage of filling → the second stage of filling) was studied under isothermal conditions at 291–303 K. The relationship between the structure of host matrices with thermal properties and kinetic parameters of inclusion compounds is discussed.

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Abstract

Novel double complex salts [M(NH3)5Br][AuBr4]2·nH2O, M = Rh, Ir, have been synthesized and examined. The processes of thermal decomposition of the compounds in inert and reductive atmospheres have been studied and intermediate products identified. Simultaneous thermal analysis with parallel mass-spectrometric analysis of evolved gases (STA-EGA) has been employed for identification of main gaseous products of thermolysis in inert atmosphere. It has been revealed that the final products of decomposition in inert or reductive atmospheres are fine powders of gold and the corresponding platinum metal with sizes of crystallites 4–40 nm. The possibility of preparation of the metastable solid solution Au0.05Ir0.95 on thermolysis of [Ir(NH3)5Br][AuBr4]2·H2O in inert atmosphere has been demonstrated.

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Journal of Thermal Analysis and Calorimetry
Authors:
D. V. Pinakov
,
V. A. Logvinenko
,
G. N. Chekhova
, and
Yu. V. Shubin

Abstract

Inclusion compounds (intercalates) of fluorinated graphite matrix with acetone (C2F x Br z ·y(CH3)2CO, x = 0.49, 0.69, 0.87, 0.92, z ≈ 0.01) were prepared by guest substitution from acetonitrile to acetone. The kinetics of the thermal decomposition (the first stage of filling → the second stage of filling) was studied under isothermal conditions at 292–313 K. The relationship of the host matrices structure with inclusion compounds thermal properties and kinetic parameters is discussed.

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Journal of Radioanalytical and Nuclear Chemistry
Authors:
F. Ditrói
,
F. Tárkányi
,
S. Takács
,
I. Mahunka
,
J. Csikai
,
A. Hermanne
,
M. Uddin
,
M. Hagiwara
,
M. Baba
,
T. Ido
,
Yu. Shubin
, and
A. Dityuk

Abstract  

Excitation functions of proton induced reactions on Pd are important for medical radioisotope production, for activation analysis, for development of low activation materials and other purposes. No experimental data exist in the literature for low and medium energy range protons. A detailed study of the excitation functions was performed up to 80 MeV proton energy by using the stacked foil irradiation technique and gamma-ray spectrometry. The irradiations were carried out at the external beam lines of the AVF cyclotron at the Tohoku University. Japan (80 and 70 MeV) and the CGR 560 cyclotron at the Vrije Universiteit Brussels (38, 29 and 17 MeV). The beam intensity, the incident energy and the energy degradation were controlled by a method based on flux constancy via normalization to the parallel measured excitation functions of natAl(p,x)22,24Na and natCu(p,x)56,58Co, 62,65Zn monitor reactions. Excitation functions for direct and cumulative cross sections have been measured for the production of 105mg,106m,110mAg, 101Pd, 101mRh and 97Ru radionuclei. Calculations for the excitation functions using the Alice-IPPE code were performed with a view to estimate the weight of the different contributing reactions and to check the trend and the magnitude of the obtained experimental data.

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