Solvent and pH Driven Self-Assembly of Isomeric or Isomorphic Complexes: Crystal Structure and Luminescent Change upon Desolvation

Three Cd(II) supramolecular isomers, namely, [Cd(IDPA)(H2O)]n·2n(H2O) (1), [Cd2(IDPA)2(H2O)3]n·n(DMF)·4n(H2O) (2), [Cd3(IDPA)3(DMA)(H2O)2n]·n(DMA)·n(H2O) (3), and two Cu(II) isomorphic complexes including [Cu(IDPA) (DMF)]n (4) and [Cu(IDPA)(H2O)]n (5) (DMF = N,N-dimethylformamide; DMA = N,N-dimethylacetamide; H2IDPA = 5-(1-oxoisoindolin-2-yl) isophthalic acid), have been synthesized under similar solvothermal conditions with different solvent systems and pH values. However, complexes 1 and 3 share an unanticipated 2D layered structure while complex 2 presents an unprecedent topological network with a new point symbol of {4·62}{4·67·82}. Complexes 4 and 5 have been generated from [Cu2(COO)4] paddlewheels as the 4-connected node with the point symbol of {64·82}. The diverse structures of 1–5 can be much related with hydrogen bonds and π–π interactions. Furthermore, the luminescent properties of complexes 1–3 have been investigated before-and-after desolvation by heating at 220 °C for 2 h. Interestingly, the...

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