Assembly of Supramolecular Compounds with Water-Soluble Calix[4]arenes

Three new copper compounds, Cu 2 [C 12 H 8 N 2 ] 2 [C 28 H 20 S 4 O 16 ][H 2 O] 11.9 ( 1 ), Cu 2 [C 12 H 8 N 2 ] 3 [C 28 H 20 S 4 O 16 ][H 2 O] 5 ( 2 ), and Cu 2 [C 12 H 8 N 2 ] 4 [C 24 H 12 S 8 O 16 ][H 2 O] 10.5 ( 3 ), were hydrothermally synthesized and structurally determined by X-ray diffraction and TG-DTA analyses. Interestingly, Compounds 1 and 2 were synthesized in a one-pot reaction. Complexes 1 and 3 contain capsule units, which are further assembled into three-dimensional (3-D) architectures with α-Po-related topology by π−π stacking and/or hydrogen-bonding interactions. In compound 2, the zigzag chains are bridged into a 2-D 6 3 or 4 4 net by π−π stacking interactions, which are stacked further into a 3-D supramolecular topology by hydrogen-bonding interactions. It is obvious that the weak intramolecular/intermolecular interactions play an important role in the formation of supramolecular networks, especially in linking low-dimensional entities into high-dimensional supramolecular frameworks. In these complexes (together with two previous compounds we prepared at room temperature), p -sulfonatocalix[4]arene (C4AS) and p -sulfonatothiacalix[4]arene (TC4AS) ligands assuming cone shape bond to the copper cations in different ways which facilitate the formation of different topologies. Compounds 1 − 3 exhibit blue emission in the solid state at room temperature and their thermal properties are examined.