Syntheses, structural and thermal studies of Eu(III) and Gd(III) complexes with 2,6-dinitrophenol and 1,10-phenanthroline/2,2鈥?bipyridine ligands

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• 作者：Udai P. Singh^a ; ^{udaipfcy@iitr.ernet.in} ; Nidhi Goel^a ; Gurdip Singh^b ; Pratibha Srivastava^b
• 关键词：X-ray crystallography ; 2 ; 6-Dinitrophenol ; 1 ; 10-Phenanthroline ; 2 ; 2&prime ; -Bipyridine ; Isothermal TG ; Ignition delay
• 刊名：Inorganica Chimica Acta
• 出版年：2012
• 期刊代码：40_00201693
• 类别：ch
• 出版时间：30 May, 2012
• 卷：387
• 期：Complete
• 页码：294-307
• 文件大小：1315 K

摘要

Some europium(III) and gadolinium(III) complexes viz., [Eu(phen)₂Cl₃CH₃OH] (1), [Gd(phen)₂(NO₃)₃] (6), [Ln(2,6-DNP)₃(phen)CH₃OH] (2, 7), [Ln(2,6-DNP)₃(phen)(OH)]路Hphen (3, 8), [Ln(2,6-DNP)₃(bipy)OH₂] (4, 9), [Ln(2,6-DNP)₃(bipy)(OH)].Hbipy (5, 10) (Ln = Eu, Gd; 2,6-DNP = 2,6-dinitrophenol; phen = 1,10-phenanthroline; bipy = 2,2鈥?bipyridine), have been synthesized and characterized by different physico-chemical methods including single crystal X-ray crystallography. Their thermal properties have been studied by thermogravimetric analysis (TG) and demonstrated that the final product after decomposition was stable oxide (Ln₂O₃) for all these complexes. Isothermal thermogravimetric study in the range of 410-450 掳C for 1-5 and 270-310 掳C for 6-10 has been done for all the complexes while the kinetics of thermal decomposition was evaluated by applying model fitting as well as an isoconversional methods. To investigate the response of these complexes under the condition of rapid heating, ignition delay (D_i) has been measured. The possible pathways of thermolysis for these complexes have also been proposed.