| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1305539 | Inorganica Chimica Acta | 2014 | 6 Pages |
•A spherical polyoxovanadate was synthesized by stepwise synthesis.•Host molecules were formed by a template switching reaction from cationic- to anionic-template.•Spherical tetradecavanadates have a similar structure with dodecavanadates.•Disk-, to bowl- to ball-type structural conversion was exhibited to incorporate an anion inside the spherical structure.•A synthetic path that enables the encapsulation of an anion was achieved for spherical oxide molecule.
A spherical tetradecavanadate, [V14O38(Cl)]7−, was synthesized from a chloride-incorporated bowl-type dodecavanadate, [Cl⊂V12O32]5−, which was prepared through a template switching reaction from [Cu2V8O24]4− using the cation template removal reagent, hydrogen cyanide. X-ray structure analysis revealed a spherical V(V) polyoxovanadate framework, without V(IV) valence state. The two-step process, involving transformation of a disk to a bowl, then transformation from the bowl to a ball, enables the incorporation of a guest anion inside the ball. An alternative route from a hexadecavanadate, which avoids the use of hydrogen cyanide, is also described.
Graphical abstractA bowl-shaped polyoxovanadate, [V12O32(Cl)]5−, was transformed to a spherical polyoxovanadate, [V14O38(Cl)]7− with all of the vanadium atoms in the V(V) oxidation state. The chloride guest was completely enclosed within the spherical cage by a bowl- to ball-type structural conversion.Figure optionsDownload full-size imageDownload as PowerPoint slide
