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Assembly of Tungsten‐Oxide‐Based Pentagonal Motifs in Solution Leads to Nanoscale {W 48 }, {W 56 }, and {W 92 } Polyoxometalate Clusters

2015; Wiley; Volume: 54; Issue: 48 Linguagem: Inglês

10.1002/anie.201506170

1521-3773

Cai‐Hong Zhan, Ross S. Winter, Qi Zheng, Jun Yan, Jamie M. Cameron, De‐Liang Long, Leroy Cronin,

Nanocluster Synthesis and Applications

We report an approach to synthesize molecular tungsten-oxide-based pentagonal building blocks, in a new {W21 O72} unit, and show how this leads to a family of gigantic molecular architectures including [H12W48O164](28-) {W48}, [H20W56O190](24-) {W56}, and [H12W92O311](58-) {W92}. The {W48} and {W56} clusters are both dimeric species incorporating two {W21} units and the {W56} species is the first example of a molecular metal oxide cluster containing a chiral "double-stranded" motif which is stable in solution as confirmed by mass spectrometry. The {W92} anion having four {W21} units is one of the largest transition metal substituted isopolyoxotungstates known.