Polyoxometalate‐Surfactant Assemblies: Responsiveness to Orthogonal Stimuli. (21st April 2022)

• Record Type: Journal Article
• Authors: Xia, Zhiqin; Lin, Chang‐Gen; Yang, Yang; Wang, Yongkang; Wu, Zhanpeng; Song, Yu‐Fei; Russell, Thomas P.; Shi, Shaowei
• Is Part Of: Angewandte Chemie. Volume 134:Number 25(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-04-21
• Subjects: Interfacial Assembly -- Jamming Transition -- Polyoxometalates -- Stimuli Responsiveness; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202203741
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Integrating different types of supramolecular interactions opens the possibility to generate nanoparticle surfactants (NPSs) at the liquid–liquid interface that are responsive to multiple stimuli. Here we develop a covalently modified polyoxometalate/β‐cyclodextrin (POM/β‐CD) organic–inorganic hybrid, consisting of a negatively charged POM cluster with β‐CD host groups. The POM/β‐CD hybrid can be dispersed in water and interacts at a water/oil interface with ligands dissolved in an oil phase through electrostatic or host–guest interactions, thereby generating POM‐surfactants (POMSs) having pH, redox, and guest‐competitive responsiveness, respectively. By taking advantage of the jamming of POMSs at the interface, a reconfigurable all‐liquid system could be produced that is responsive to orthogonal changes in the external environment. Abstract : Covalently modifying a polyoxometalate with β‐cyclodextrin has led to the formation of a polyoxometalate/β‐cyclodextrin hybrid. The hybrid, when dissolved in water, can assemble at liquid–liquid interfaces with ligands dissolved in toluene, thereby generating polyoxometalate surfactants (POMSs) with pH, redox or guest–competitive responsiveness.