A molecular bowl with barium ion covering one portal of decamethylcucurbit[5]uril as a‘metal-ion- bottom’has been synthesized. The structure of the molecular bowl has been confirmed by the single crystal X-ray diffraction determination. It belongs to orthorhombic with space group of Pna21. The crystal unit cell parameters are: a=3.2108(6) nm, b=1.4742(3) nm, c=1.1516(2) nm, and V=5.4509(18) nm3, Dc=1.677 Mg·m-3, Z=4, F(000)= 2832, R=0.0551, wR=0.1568. CCDC: 290552.
Crystals of a new 1,4-dimethyl cucurbituril(TMeQ6) with Silver(I) ion were synthesized, and the structure was determined by X-ray diffraction technique. There are two kinds of TMeQ6 A and B which formed molecular encapsulates with two silver ion lids in the self-assembled entities. One dimensional supramolecular tubes are formed from the encapsulates A, and two dimensional molecular sieves are formed from the encapsulates B, the tubes and the sieves stack together alternately in the self-assembled entities. CCDC: 271401.
A novel complex of a new 1,4-dicyclohexyl cucurbituril(DCYQ6) with sodium(I) ion was synthesized, and the crystal structure was determined by X-ray diffraction technique. In this self-assembled entity both the cavity interaction of DCYQ6 included a nitrate anion and the portal interaction of the dipole carbonyls of DCYQ6 with sodium cations lead to form self assembled molecular capsules. The crystal structure of the entity shows a packing of the self assembled molecular capsules connected by hydrogen bonds of water molecules. CCDC: 271400.
