Self-assembled All-inorganic Chiral Polyoxovanadate: Spontaneous Resolution of Nitrate-incorporated Octadecavanadate

Abstract A chiral octadecavanadate has been isolated and optically resolved into enantiomers by spontaneous resolution. From the partial oxidation reaction of a reduced decavanadate [V10O26]4− with nitric acid, a chiral octadecavanadate encapsulating a nitrate template was formed. A nitrate anion was incorporated at the center of the spherical polyoxovanadate cage. The structure may be regarded as a double helical V8 ribbon between two square pyramidal VVIO5 units, consisting of half-pitch helix with ca. 11.0 Å diameter and a half pitch length of 8 Å.