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合成了稀土高氯酸铕 -谷氨酸配合物晶体。经热重、差热、化学分析及对比有关文献 ,知其组成是[Eu2 (Glu) 2 (H2 O) 8](ClO4 ) 4·H2 O ,单晶结构 ,纯度是 95.0 6%。选用Eu(NO3 ) 3 ·6H2 O、L -Glu、NaClO4 ·H2 O、NaNO3 和H2 O作辅助物 ,使用具有恒温环境的反应热量计 ,以 2mol·L-1HCl作溶剂 ,分别测定了 [2Eu(NO3 ) 3 ·6H2 O +2Glu +6NaClO4 ·H2 O]和 {[Eu2 (Glu) 2 (H2 O) 8](ClO4 ) 4·H2 O +6NaNO3 +9H2 O}在 2 5℃时的溶解焓。设计一热化学循环求得化学反应的反应焓△rH0m =3 6.873kJ·mol-1,计算得配合物 [Eu2 (Glu) 2 (H2 O) 8](ClO4 ) 4·H2 O(s)在 2 98.1 5K时的标准生成焓△fH0m ,2 98.15K=-6584 .853kJ·mol-1。
Synthesis of a rare earth perchlorate europium - glutamate complex crystals. Based on the thermogravimetry, differential thermal analysis, chemical analysis and comparative literature, we know that its composition is [Eu2 (Glu) 2 (H2O) 8] (ClO4) 4 · H2O, single crystal structure with purity of 95.0 6%. Eu (NO3) 3 · 6H2O, L-Glu, NaClO4 · H 2 O, NaNO 3 and H 2 O were used as auxiliary materials. The reaction was performed using a reaction calorimeter with constant temperature and 2 mol·L-1 HCl as solvent. (NO3) 3 · 6H2O + 2Glu + 6NaClO4 · H2 O] and {[Eu2 (Glu) 2 (H 2 O) 8] (ClO 4) 4 · H 2 O + 6NaNO 3 + 9H 2 O} at 25 ℃ . The reaction enthalpy △ rH0m = 3 6.873 kJ · mol-1 was obtained by designing a thermochemical cycle. The complex [Eu2 (Glu) 2 (H 2 O) 8] (ClO 4) 4 · H 2 O The standard enthalpy of formation △ fH0m at 2 98.1 5K, 2 98.15K = -6584 .853kJ · mol-1.