1,1′-Biphenyl-3,3′,4,4′-tetracarboxylic acid dianhydride has been reacted with uranyl nitrate under solvo-hydrothermal conditions and in the presence of different counterions to give three complexes of varying periodicity. [Co(en)₃]- [UO₂(bptc)(HCOO)] ⋅ 2.5H₂O (1) crystallizes as a monoperiodic coordination polymer in which the bptc⁴⁻ ligand is exclusively bound through formation of two 7-membered chelate rings. The [Co(en)₃]³⁺ counterion is essentially a hydrogen bond donor, forming 15 hydrogen bonds with carboxylate and water oxygen atoms. In [H₂NMe₂]₂[UO₂(bptc)] ⋅ 0.5H₂O (2), half the ligand forms a 7-membered chelate ring, and the other half bridges two uranium atoms, resulting in the formation of a diperiodic network with hcb topology, the H₂NMe₂⁺ counterions being located between the undulating sheets. [PPh₄]₄[(UO₂)₄(bptc)₃] ⋅ 6H₂O (3) contains a mixture of ligands forming either four 4-membered or two 7-membered chelate rings, the latter with further bridging, which gives a triperiodic framework displaying large channels, each of which contains two rows of PPh₄⁺ counterions. These results are compared to those of previous studies with this ligand, and of similar studies of phthalate complexes of uranyl ion, in particular in relation to 7-membered chelate ring formation.

中文翻译：

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1,1'-Biphenyl-3,3',4,4'-Tetracarboxylate 铀酰离子配合物中的链、网络和框架形成

1,1'-联苯-3,3',4,4'-四羧酸二酐在溶剂水热条件下与硝酸铀酰在不同反离子存在下反应，得到三种不同周期的配合物。[Co(en) ₃ ]- [UO ₂ (bptc)(HCOO)] ⋅ 2.5H ₂ O ( 1 ) 结晶为单周期配位聚合物，其中 bptc ^4-配体通过形成两个 7 元螯合物而专门结合戒指。[Co(en) ₃ ] ³⁺抗衡离子本质上是氢键供体，与羧酸根和水氧原子形成15个氢键。在 [H ₂ NMe ₂ ] ₂ [UO ₂(bptc)] ⋅ 0.5H ₂ O ( 2 )，一半配体形成7元螯合环，另一半桥接两个铀原子，从而形成具有hcb拓扑结构的双周期网络，即H ₂ NMe ₂ ⁺反离子位于起伏片之间。[PPh ₄ ] ₄ [(UO ₂ ) ₄ (bptc) ₃ ] ⋅ 6H ₂ O ( 3 ) 包含配体混合物，形成四个 4 元或两个 7 元螯合环，后者有进一步的桥接，从而得到显示大通道的三周期框架，每个通道包含两行 PPh₄ ⁺反离子。将这些结果与之前使用该配体的研究以及铀酰离子邻苯二甲酸盐络合物的类似研究的结果进行比较，特别是与 7 元螯合环的形成有关。