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Abstract
The reaction of tetrasodium p-sulfonatothiacalix[4]arene (Na4H4TCAS), copper(II) nitrate and pyridine N-oxide (PNO) afforded a yellow copper(II)-p-sulfonatothiacalix[4]arene complex. X-ray diffraction analysis displays that it is an interesting dimeric supramolecular capsule, [Cu2(PNO)2(H2O)6]4+ ⊂ [(H6TCAS)2]4 − ·22H2O, in which two PNO molecules bridge the two CuII ions in the O,O′-μ2 mode and the hydrophobic aromatic rings point into the cavities of the thiacalixarenes. Interestingly, the thiacalixarenes pack themselves into the closed pores through π…π interactions in ab plane, and these pores further link to each other through hydrogen bonding to construct infinite hydrophilic tunnels, which fill with the disordered water molecules as the guests.
In a dimeric supramolecular capsule, [Cu2(PNO)2 (H2O)6]4+ ⊂ [(H6TCAS)2]4·22H2O, two PNO molecules bridge the two CuII ions in the O,O′-μ2 mode and the hydrophobic aromatic rings point into the cavities of the thiacalixarenes. Interestingly, the thiacalixarenes pack themselves into the closed pores through π…π interactions in ab plane, and these pores further link to each other through hydrogen bonding to construct infinite hydrophilic tunnels, which fill with the disordered water molecules as the guests.
Acknowledgement
We thank the financial support from NSFC (No. 20231020), Natural Foundation of Fujian Province.
