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Citation: ZHANG Da-Hai, XU Su-Ling, REN Ning. Preparation,Characterization and Non-Isothermal Decomposition Kinetics of [Dy(p-MBA)₃phen]₂[J]. Chinese Journal of Applied Chemistry, ;2010, 27(11): 1339-1343. doi: 10.3724/SP.J.1095.2010.00081 shu

Preparation,Characterization and Non-Isothermal Decomposition Kinetics of [Dy(p-MBA)₃phen]₂

a. Department of Chemistry, Handan College, Handan;
b. Department of Engineering, Shijiazhuang Foreign Economy and Trade Vocational College, Shijiazhuang 050061

Received Date: 1 February 2010
Revised Date: 14 April 2010

A ternary complex with the formula of[Dy(p-MBA)₃phen]₂(p-MBA=p-methylbenzoic acid;phen=1,10-phenathroline) was synthesized via the solution method. Elemental analysis,infrared spectra,molar conductance,thermogravimetry and derivative thermogravimetry(TG-DTG) were used to characterize the title complex.The results show the Dy(Ⅲ) ion was coordinated to the oxygen atoms of p-methylbenzoic acid,and the nitrogen atoms of the 1,10-phenanthroline,and the title complex has a good thermal stability.Nonisothermal kinetics of the first thermal decomposition stage of Dy(Ⅲ) complex was studied in the static air atmosphere.Through the Popescu method and the nonlinear integral isoconversional(NL-INT) method,the kinetic equation was expressed as (dα)/(dT)=(15.55 × 10¹²)/(β) exp ((-19825.60)/(T))3(1-α)^2/3, and the average activation energy and the pre-exponential factor were 164.83 kJ/mol and 15.55 × 10¹² min^-1,respectively.The thermal stability of a series of complexes was compared. The results may provide some valuable materials for the choice of functional materials of rare-earth complexes.
- dysprosium complex,
- p-methylbenzoi cacid,
- phenanthroline,
- non-isothermal kinetics
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Preparation,Characterization and Non-Isothermal Decomposition Kinetics of [Dy(p-MBA)₃phen]₂