Wen-Hua Wang

Olive-Shaped Chiral Supramolecules: Simultaneous Self-Assembly of Heptameric Lanthanum Clusters and Carbon Dioxide Fixation†

Clusters last stand: Six chiral reduced Schiff base ligands containing amino acids and seven La(III) ions self-assemble to form a novel heptameric lanthanum supramolecule with the aid of the CO(3)(2-) ion (see picture). The cluster exists as a single chiral triple helix. The CO(3)(2-) ion, which is derived from atmospheric CO(2) , adopts a rare mu(3)-tridentate bridging mode that links three La(III) ions, thus allowing the cluster to efficiently fix CO(2).

4-(Hydroxy-meth-yl)phenol.

In the molecule of the title compound, C7H8O2, the phenol O and hydroxymethyl C atoms lie in the ring plane [deviations of −0.015 (3) and and 0.013 (3) Å, respectively]. In the crystal structure, intermolecular O—H⋯O hydrogen bonds link molecules into a network. A weak C—H⋯π interaction is also found.

1,1′-(2,5-Dimethyl-1,4-phenyl­enemethyl­ene)di-1H-imidazole dihydrate

In the title compound, C16H18N4 (.) 2H2O, there is one half-molecule ( organic) and one water molecule in the asymmetric unit, the organic molecule being centrosymmetric. The separation of the two terminal N atoms is 11.296 (8) angstrom and the dihedral angle between the benzene and imidazole rings is 85.27 (18)degrees; the molecule adopts a Z-shaped conformation. A one-dimensional water chain links the organic molecules, forming a two-dimensional ladder-shaped network along the b-axis direction through intermolecular O-H (...) O and N-H (...) O hydrogen bonds.