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  • Author or Editor: Bi Caifeng x
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Abstract  

A new Schiff base complex of [UO2L(C2H5OH)(H2O)3]NO3 (HL=4-(2-hydroxy-naphthalen-1-ylmethyleneamino)-antipyrin) composition has been synthesized and characterized by elemental analysis, IR, UV and molar conductance. The thermodecomposition kinetics of the complex was investigated under non-isothermal conditions. TG and DTG curves indicate that the complex decomposes in five steps. The kinetics of the first step was calculated by a combination of Achar differential and Coats-Redfern integral methods. The kinetic equation was determined.

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Abstract  

Two new solid binuclear complexes of the compositions [(UO2)2(HL)3]NO3, and [Th2(HL)3(NO3)2](NO3)3 (H2L=o-vanillylidene anthranilic acid) have been synthesized and characterized by elemental analyses, DTA-TG, IR spectra, UV spectra and molar conductance. Possible structures of the two complexes have been proposed.

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Abstract  

Two new solid complexes, [ThL(NO3)2](NO3)2, [UO2L(NO3)]NO3 (L=o-vanillin-p-phenylenediamine) have been synthesized and characterized by elemental analyses, DTA-TG, IR spectra, UV spectra and molar conductance. Possible structures of the two complexes are proposed.

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Summary  

A new unsymmetrical Schiff base ligand (H2LLi) was synthesized using L-lysine, o-vanillin and salicylaladyde. Thorium(IV) complex of this ligand [Th(H2L)(NO3)](NO3)2 .3H2O have been prepared and characterized by elemental analyses, IR, UV and molar conductance. The thermal decomposition kinetics of the complex for the second stage was studied under non-isothermal condition by TG and DTG methods. The kinetic equation may be expressed as: dα/dt=A .e-E/RT.1/2 (1-α).[-ln(1-α)]-1. The kinetic parameters (E, A), activation entropy ΔS ¹ and activation free-energy ΔG ¹ were also calculated.

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