Preparation, thermal decomposition and lifetime of Eu(III)-phenanthroline complex doped xerogel |
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Authors: | Jianhe Hong Tongyin Yi Changjie Cong Keli Zhang |
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Affiliation: | a College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China b Centre of Nanoscience and Nanotechnology Research, Wuhan University, Wuhan 430072, China c Institute of Chemistry and Chemical Industry, Wuhan University, Wuhan 430072, China |
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Abstract: | The main purpose of this work is proposing a new method of using non-isothermal formal kinetics analysis to predict the lifetime of luminescent complex materials. The Eu(III)-phenanthroline complex doped xerogel has been in situ synthesized by a catalyst-free sol-gel method. The photoluminescence spectra and TG curves of the xerogel verify the formation and decomposition of Eu(III)-phenanthroline complex in xerogel. The decomposition of the xerogel formally occurs in three steps. The Friedman and FWO isoconversional methods and multivariate non-linear regression method are used for formal kinetic analysis. The overall decomposition process below 800 °C is fitted by three-step consecutive reaction. The best fitted model for each step is Fn (n order reaction, the corresponding function f(α) is (1 − α)n). Correlation coefficient is 0.99956. The lifetime values of xerogel at different temperatures are predicted based on non-isothermal kinetic models by the 5% decomposition of europium organic complex. |
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Keywords: | Formal kinetics Thermal decomposition Multivariate non-linear regression Lifetime Europium complex doped xerogel |
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