Introducing Chirality into Hybrid Clusters from an Achiral Ligand: Synthesis and Characterization of Polyoxomolybdates Containing a Benzylarsonate Group

Abstract

Benzylarsonic acid as a flotation collector was introduced into polyoxometalate chemistry and two new hybrid clusters, [(C 6 H 5 CH 2 AsO 3 ) 2 Mo 5 O 15 ] 4-(1a) and [(C 6 H 5 CH 2 AsO 3 ) 4 -Mo 12 O 34 ] 4- (2a), were synthesized and characterized by chemical and spectral analysis. Self-assembly of 1a led to chiral crys- [a]

Electronic Structure and Photoactivity of Organoarsenic Hybrid Polyoxometalates

“…Phenylarsonic acids are isoelectronic to phenylphosphonic acids yet have not been explored as electronic modulators of redox-rich tungstate-based POMs. In fact, only a small number of examples exist where polyoxotungstates have been functionalized with organoarsenic groups, and these have mainly served as structural motifs for accessing new cluster morphologies. − …”

“…In fact, only a small number of examples exist where polyoxotungstates have been functionalized with organoarsenic groups, and these have mainly served as structural motifs for accessing new cluster morphologies. 23 − 31 …”

A Reversibly pH-Switchable Open/Closed Cage Constructed from Triangular Polyoxometalate Hybrid [(C7H7AsO3)6W12O36]12– Cluster Anions Exhibiting Supramolecular Chirality

“…Our group is interested in functional POM and POM hybrid molecules, and we have demonstrated that using benzylarsonate to construct the POM hybrid could introduce additional chirality into the hybrid compound in either the formation of a conventional bond or supramolecular packing. 25 In an effort to understand the self-assembly process and configuration control, herein we extended the study to polyoxotungstate systems, and a n e w t r i a n g u l a r P O M h y b r i d c a g e c l u s t e r , [ ( C 7 H 7 A sO 3 ) 6 W 1 2 O 3 6 ] 1 2 − ( 1 a ) , w a s is o l a t e d a s Na 2 (C 2 H 8 N) 4 H 6 [(C 7 H 7 AsO 3 ) 6 W 12 O 36 ]•30H 2 O (1; CCDC 1814918). Unexpectedly, 1a reorganized into the isomer 2a when it was further protonated.…”