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Synthesis, crystal structure, luminescence and thermal decomposition kinetics of Eu(III) complex with 2,4-dichlorobenzoic acid and 2,2′-bipyridine |
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| Authors: | Liang Tian Ning Ren Hong-Mei Liu Hong-Mei Ye Shu-Jing Sun |
| Institution: | a Experimental Center, Hebei Normal University, Shijiazhuang, Hebei 050016, PR China b College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050016, PR China c Department of Chemistry, Handan College, Handan 056005, PR China d College of Chemistry and Pharmacy Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, PR China e Department of Compute, Hebei Normal College of Science and Technology, Qinhuangdao 066600, PR China |
| Abstract: | The complex of Eu(2,4-DClBA)3(bipy)]2 (2,4-DClBA = 2,4-dichlorobenzoate; bipy = 2,2′-bipyridine) was obtained and characterized by elemental analysis, IR spectra, UV spectra, luminescence spectra, 1H NMR spectra, single crystal X-ray diffraction and TG-DTG techniques. Two Eu3+ ions are connected by four carboxylate groups through bridging bidentate and bidentate chelating-bridging mode. The coordination number of europium ion is nine. The thermal decomposition behavior of the title complex under a static air atmosphere can be discussed by TG-DTG, SEM and IR techniques. The non-isothermal kinetics was investigated by using double equal-double steps method and Starink method. The mechanism function of the first decomposition step was determined. Meanwhile, the thermodynamic parameters (ΔH≠, ΔG≠ and ΔS≠) and kinetic parameters (activation energy E and the pre-exponential factor A) were also calculated. |
| Keywords: | 2 4-Dichlorobenzoic acid Europium complex Crystal structure Thermal analysis Non-isothermal kinetics Luminescence |
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