Two Coordination Networks Built fromp-Sulfonatothiacalix[4]arene Tetranuclear Clusters

Two coordination compounds based on p-sulfonatothiacalix[4]arene (TCAS) were synthesized by hydrothermal reactions of TCAS with M2+ cations (M = Cu for 1, M = Co for 2) in the presence of [PhCH2N(CH3)3]+. Single-crystal X-ray analyses revealed that both compounds, 1 and 2, are isomorphous and crystallize in the same space group . The tetranuclear cluster units are connected into layer networks through complicated hydrogen-bonding and π–π interactions. The results of thermogravimetric measurements demonstrate that 1 and 2 have the high thermal stabilities.