The homonuclear water-soluble and air stable compounds (dmpH) (H₅O₂) au][M(pydc)₂].0.5H₂O (M = Ni(II) (1), Cu(II) (2), Zn(II) (3); pydcH₂ = pyridine-2,6-dicarboxylic acid, dipicolinic acid, dmp = 2,9-dimethyl-1,10-phenanthroline) have been prepared by self-assembly synthesis in aqueous solution at room temperature, and characterized by IR, ¹H NMR, ¹³C NMR, elemental analysis and X-ray diffraction single crystal analyses for 1, 2 and 3. The complexes 1–3 represent the isostructural features. Extensive hydrogen bonding interactions involving all aqua ligands, dipicolinate oxygens and lattice water molecules further stabilize the complex units by linking them to form three dimensional polymeric networks. The stoichiometry and stability of the all three complexes in aqueous solution were investigated by potentiometric pH titration.

中文翻译：

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由吡啶-2,6-二羧酸和2,9-二甲基-1,10-菲咯啉得到的Ni（II），Cu（II）和Zn（II）配合物的合成，表征，晶体结构和溶液研究

同核水溶性和空气稳定化合物（dmpH）（H ₅ O ₂）au [M（pydc）₂ ] .0.5H ₂ O（M = Ni（II）（1），Cu（II）（2） ，Zn（II）（3）； pydcH ₂＝吡啶-2，6-二羧酸，二吡啶甲酸，dmp ＝ 2，9-二甲基-1，10-菲咯啉）是通过在水溶液中自组装合成的。室温，用IR，¹ H NMR，¹³ C NMR，元素分析和X射线衍射的单晶分析为1，2和3。配合物1-3代表同构特征。涉及所有水族配体，二吡啶甲酸氧和晶格水分子的广泛氢键相互作用通过将它们连接形成三维聚合网络而进一步稳定了复杂单元。化学计量和在水溶液中的所有三种复合物的稳定性通过电位研究p ħ滴定。