【摘要】 合成了两种高氯酸铒和甘氨酸及丙氨酸的混配型配合物,经元素分析、化学分析、热重、差热及与有关文献对比,确定其组成为[Er2(Gly)4(Ala)2(H2O)4](ClO4)6.3H2O和Er2(Gly)5(Ala)3(ClO4)6.2H2O.用溶解量热法在具有恒温环境精密溶解-反应热量计上分别测定了298.15K时两种配合物的反应物和产物在2mol/LHCl溶液中的溶解焓.通过设计热化学循环求出配位反应的焓变ΔrHm,进而计算出配合物的标准生成焓:ΔfH—○—m—{[Er2(Gly)4(Ala)2(H2O)4](ClO4)6·3H2O,s,298.15K}=-7408.60kJ·mol-1;ΔfH——m○—{Er2(Gly)5(Ala)3(ClO4)6·2H2O,s,298.15K}=-7079.16kJ·mol-1.更多还原

【Abstract】 The mixed ligand complexes of erbium perchlorate with glycine and alanine were synthesized. Their compositions were determined to be \[Er₂（Gly）₄（Ala）₂(H₂O)₄\] (ClO₄)₆·3H₂O and (Er₂（Gly）₅（Ala）₃(ClO₄)₆·2H₂O) by comparison of elemental analysis, chemical analysis, TG-DTA,data with corresponding literature. The dissolution enthalpies of their reactants and products in 2 mol/L HCl solution （298.15 K） were measured respectively with an isoperible solution-reaction calorimeter. Each Δ_rH_m of the coordination reaction was calculated by a designed thermochemical cycle. Based on it, each standard molar enthalpy of formation was obtained, i.e.,Δ_fH^<sup>○（——）_m{\[Er₂（Gly）₄（Ala）₂（H₂O）₄\]（ClO₄）₆·3H₂O,s,298.15K}=-7 408.60 kJ·mol^-1;Δ_fH^<sup>○（——）_m{Er₂（Gly）₅（Ala）₃（ClO₄）₆·2H₂O,s,298.15K}=-7 079.16 kJ·mol^-1.更多还原