Temperature‐Responsive Self‐Assembly of Single Polyoxometalates Clusters Driven by Hydrogen Bonds

Smart materials that can respond to external stimuli are typically prepared through the coating of specific responsive ligands. Herein, for the first time, thermally reconfigurable single polyoxometalate (POM) cluster assemblies without temperature‐responsive surfactants are reported. Based on trans...

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Bibliographic Details
Published in:Advanced functional materials 2021-07, Vol.31 (30), p.n/a
Main Authors: Liu, Qingda, Yu, Hongde, Zhang, Qinghua, Wang, Dong, Wang, Xun
Format: Article
Language:English
Subjects:
Assembly
Catalytic activity
Clusters
Epoxidation
Hydrogen bonds
Materials science
Nanowires
olefin epoxidation
polyoxometalate clusters
Polyoxometallates
Room temperature
self‐assembly
Smart materials
Superlattices
temperature responsiveness
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Summary:Smart materials that can respond to external stimuli are typically prepared through the coating of specific responsive ligands. Herein, for the first time, thermally reconfigurable single polyoxometalate (POM) cluster assemblies without temperature‐responsive surfactants are reported. Based on transmission electron microscopy observation, POM clusters are obtained to arrange into a 2D single cluster superlattice at 25 °C, and transform themselves into a single cluster nanowire below 0 °C, which is caused by the switching of hydrogen bond linkage between clusters. Contributed by the specific coordinative state, the POM assembly exhibits excellent catalytic activity and stability toward olefin epoxidation at room temperature, demonstrating the application potentials of the nanostructures based on single clusters. The 2D superlattice assembly obtained at 25 °C can transform into single cluster nanowires reversibly below 0 °C, which is driven by the formation and break of hydrogen bonds between clusters. The polyoxometalate cluster assembly presents excellent catalytic activity and stability toward olefin epoxidation as a single‐atom catalyst due to their specific coordinative state.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202103561