Kinetic study of chelates of 2,2,6,6-tetramethyl-3,5-heptanedione with some lanthanide elements

A. G. Souza; M. L. A. Tavares; D. M. A. MeloM. M. ConceicaoJ. G. P. EspinolaC. Airoldi

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Kinetic study of chelates of 2,2,6,6-tetramethyl-3,5-heptanedione with some lanthanide elements

机译：Kinetic study of chelates of 2,2,6,6-tetramethyl-3,5-heptanedione with some lanthanide elements

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摘要

The thermal decomposition reactions of crystalline chelates of general formula Ln(thd)_3 (Ln=La, Pr, Nd, Sm and Gd; thd=2,2,6,6-tetramethyl-3,5-heptanedione) have been studied by isothermal thermogravimetry. Several models were proposed initially to calculate the kinetic parameters by isothermal method, thus the time reduced method was used to define the best kinetic models. The Avrami-Erofeev (Am=2, 3 and 4) and R1 and R2 models presented good agreement with experimental data, as well as, linear correlation coefficient (r) and standard deviation (s).

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来源
《Journal of thermal analysis and calorimetry》 |2002年第2期|351-357|共7页
作者
A. G. Souza; M. L. A. Tavares; D. M. A. MeloM. M. ConceicaoJ. G. P. EspinolaC. Airoldi;
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作者单位

Departamento de Quimica, CCEN, Universidade Federal da Paraiba, 58059-900, Joao Pessoa, Paraiba, Brazil;

Departamento de Quimica, CCET, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil;

Instituto de Quimica, Universidade Estadual de Campinas, Caixa Postal 6154, 13083-970 Campinas, Sao Paulo, Brazil;

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正文语种英语
中图分类物理化学（理论化学）、化学物理学;
关键词
kinetic analysis; lanthanide; 2; 6; 6-tetramethyl-3; 5-heptanodione; thermal decomposition; thermogravimetry;

Kinetic study of chelates of 2,2,6,6-tetramethyl-3,5-heptanedione with some lanthanide elements

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