Thermal studies of solid 2-methoxybenzylidenepyruvate of lighter trivalent lanthanides

被引：12

作者：

Ionashiro, EY ^{[1
]}

Fertonani, FL ^{[1
]}

Melios, CB ^{[1
]}

Ionashiro, M ^{[1
]}

机构：

[1] UNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2005年 / 79卷 / 02期

关键词：

lighter lanthanides; 2-methoxybenzylidenepyruvate; thermal behaviour;

D O I：

10.1007/s10973-005-0053-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Solid-state compounds with a general formula of LnL(3)(.)nH(2)O, where Ln stands for lighter trivalent lanthanides (lanthanum to samarium), L is 2-methoxybenzylidenepyruvate and n = 1.5, 2, 2, 1.5 and 2, respectively, have been synthesized. On heating these compounds are decompose in two or three steps. They lose their hydration water in the first step and the thermal decomposition of the anhydrous compounds occurs with the formation of the respective oxide, CeO2, Pr6O11 and Ln(2)O(3) (Ln = La, Nd, Sm) as final residue. The dehydration enthalpies found for these compounds (La to Sm) were: 222.7, 163.6, 497.7, 513.9 and 715.4 kJ mol(-1), respectively.

引用

页码：299 / 303

页数：5

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