title: Assembly of Tungsten-Oxide-Based Pentagonal Motifs in Solution Leads to Nanoscale {W48}, {W56}, and {W92} Polyoxometalate Clusters.
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 [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.
authors.affiliation: WestCHEM, School of Chemistry, The University of Glasgow, Glasgow G12 8QQ (UK) http://www.croninlab.com.
authors.forename: Cai-Hong
authors.initials: CH
authors.lastname: Zhan
authors.affiliation: WestCHEM, School of Chemistry, The University of Glasgow, Glasgow G12 8QQ (UK) http://www.croninlab.com.
authors.forename: Ross S
authors.initials: RS
authors.lastname: Winter
authors.affiliation: WestCHEM, School of Chemistry, The University of Glasgow, Glasgow G12 8QQ (UK) http://www.croninlab.com.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zheng
authors.affiliation: WestCHEM, School of Chemistry, The University of Glasgow, Glasgow G12 8QQ (UK) http://www.croninlab.com.
authors.forename: Jun
authors.initials: J
authors.lastname: Yan
authors.affiliation: WestCHEM, School of Chemistry, The University of Glasgow, Glasgow G12 8QQ (UK) http://www.croninlab.com.
authors.forename: Jamie M
authors.initials: JM
authors.lastname: Cameron
authors.affiliation: WestCHEM, School of Chemistry, The University of Glasgow, Glasgow G12 8QQ (UK) http://www.croninlab.com. Deliang.Long@glasgow.ac.uk.
authors.forename: De-Liang
authors.initials: DL
authors.lastname: Long
authors.affiliation: WestCHEM, School of Chemistry, The University of Glasgow, Glasgow G12 8QQ (UK) http://www.croninlab.com. Lee.Cronin@glasgow.ac.uk.
authors.forename: Leroy
authors.initials: L
authors.lastname: Cronin
keywords: building block; double stranded structures; isopolyoxotungstates; pentagonal motif; polyoxometalate