A New 2D Copper(II) Coordination Polymer with a Schiff Base Ligand with Weakly Coordinating Sulfonate Groups Affecting the Structure

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A new 2D copper(II) coordination polymer with the doubly deprotonated Schiff base ligand 2- (2-hydroxybenzylideneamino)ethanesulfonic acid (H2Saes) has been synthesized, {[Cu(Saes)(4,4´- bpy)]2·H2O}n (1), and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental and thermogravimetric analysis. Dinuclear copper complexes serve as secondary building blocks (SBUs) to construct an unusual coordination network with an interpenetrating CdSO4 topology. In the crystal, the components form a stable 3D supramolecular architecture by O-H· · ·O, C-H· · ·O interactions and π stacking.