Seven homo- or heterometallic uranyl ion complexes with R,S-malic (H3ml), R-citramalic (H3cml), citric (H4cit) and tricarballylic (H3tca) acids were obtained under (solvo-)hydrothermal conditions and characterized by their crystal structure and, for five of them, their uranyl emission spectrum. All the malate, citramalate and citrate complexes contain the frequently observed 2:2 dimeric uranyl subunit in which the alkoxide group is bridging, these subunits being generally assembled into one-dimensional (1D) polymeric chains by bridging carboxylate groups. [(UO2)4(ml)2(C2O4)(NMP)4] (1) and [(UO2)2Cu2(ml)2(C2O4)(phen)2] (2), which contain oxalate anions formed in situ, crystallize as two-dimensional (2D) networks, the increase in dimensionality being provided by uranyl or copper oxalate bridges. [(UO2)2Ni(cml)2(cyclam)] (3) is also a 2D species, while [(UO2)2Cd(cml)2(bipy)(H2O)2] (4) crystallizes as a three-dimensional (3D) framework (even if CdII cations are disregarded). [(UO2)2Zn(Hcit)2(bipy)2(H2O)] (5) is a 1D polymer with decorating Zn(bipy)2(H2O)2+ groups, while [(UO2)2Cd(Hcit)2(bipy)2] (6) is a 2D network. [(UO2)2Pb(tca)2(H2O)4] (7), in which the three carboxylate groups are chelating and two of them further bridging, is a 3D framework. The uranyl emission spectra of complexes 3–6 are in agreement with a previously described trend, the largest blue-shift being found for the eight-coordinate complex 7

中文翻译：

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铀酰离子与手性苹果酸和柠檬酸以及前手性柠檬酸和三碳烯酸的配合物：共配体和其他金属阳离子的影响

在（溶剂-）水热条件下获得了七种与 R,S-苹果酸 (H3ml)、R-柠檬酸 (H3cml)、柠檬酸 (H4cit) 和三碳烯酸 (H3tca) 酸的均或异金属铀酰离子络合物，并通过其晶体结构表征并且，对于其中五个，他们的铀酰发射光谱。所有的苹果酸盐、柠檬酸盐和柠檬酸盐复合物都含有经常观察到的 2:2 二聚铀酰亚基，其中醇盐基团桥接，这些亚基通常通过桥接羧酸盐基团组装成一维 (1D) 聚合物链。[(UO2)4(ml)2(C2O4)(NMP)4] (1) 和 [(UO2)2Cu2(ml)2(C2O4)(phen)2] (2)，其中含有原位形成的草酸根阴离子，结晶为二维 (2D) 网络，维数的增加由铀酰或草酸铜桥提供。[(UO2)2Ni(cml)2(cyclam)] (3) 也是一个二维物种，而 [(UO2)2Cd(cml)2(bipy)(H2O)2] (4) 结晶为三维 (3D) 框架（即使忽略 CdII 阳离子）。[(UO2)2Zn(Hcit)2(bipy)2(H2O)] (5) 是一种具有修饰 Zn(bipy)2(H2O)2+ 基团的一维聚合物，而 [(UO2)2Cd(Hcit)2(bipy) )2] (6) 是一个二维网络。[(UO2)2Pb(tca)2(H2O)4] (7)，其中三个羧酸根基团螯合，其中两个进一步桥接，是一个 3D 框架。配合物 3-6 的铀酰发射光谱与先前描述的趋势一致，在八坐标配合物 7 中发现了最大的蓝移 [(UO2)2Pb(tca)2(H2O)4] (7)，其中三个羧酸根基团螯合，其中两个进一步桥接，是一个 3D 框架。配合物 3-6 的铀酰发射光谱与先前描述的趋势一致，在八坐标配合物 7 中发现了最大的蓝移 [(UO2)2Pb(tca)2(H2O)4] (7)，其中三个羧酸根基团螯合，其中两个进一步桥接，是一个 3D 框架。配合物 3-6 的铀酰发射光谱与先前描述的趋势一致，在八坐标配合物 7 中发现了最大的蓝移