Assembly of Tungsten‐Oxide‐Based Pentagonal Motifs in Solution Leads to Nanoscale {W48}, {W56}, and {W92} Polyoxometalate Clusters. Issue 48 (9th October 2015)

• Record Type: Journal Article
• Authors: Zhan, Cai‐Hong; Winter, Ross S.; Zheng, Qi; Yan, Jun; Cameron, Jamie M.; Long, De‐Liang; Cronin, Leroy
• Is Part Of: Angewandte Chemie international edition. Volume 54:Issue 48(2015)
• Page Start: 14308
• Page End: 14312
• Publication Date: 2015-10-09
• Subjects: building block -- double stranded structures -- isopolyoxotungstates -- pentagonal motif -- polyoxometalate; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201506170
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: 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 [H12 W48 O164 ] 28− {W48 }, [H20 W56 O190 ] 24− {W56 }, and [H12 W92 O311 ] 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. Abstract : High nuclearity isopolyoxotungstates (isoPOTs) of formulae [H12 W48 O164 ] 28−, [H20 W56 O190 ] 24− and [H12 W92 O311 ] 58− are made of unique {W21 O72 } building units containing pentagonal {W(W5 )}, {W(W4 )}, and {W(W3 )} motifs. The growth of these {W21 O72 } building blocks allows for the formation of large isoPOTs with chiral features.