High Proton‐Conductivity in Covalently Linked Polyoxometalate‐Organoboronic Acid‐Polymers

Abstract

The controlled bottom-up design of polymers with metal oxide backbones is a grand challenge in materials design, as it could give unique control over the resulting chemical properties. Herein, we report a 1D-organo-functionalized polyoxometalate polymer featuring a purely inorganic backbone. The polymer is self-assembled from two types of monomers, inorganic Wells-Dawson-type polyoxometalates, and aromatic organo-boronates. Their covalent linkage results in 1D polymer strands, which combine an inorganic oxide backbone (based on BÀO and NbÀO linkages) with functional organic side-chains. The polymer shows high bulk proton conductivity of up to 1.59 10 À1 S cm À1 at 90 8C and 98 % relative humidity. This synthetic approach could lead to a new class of organic-inorganic polymers where function can be designed by controlled tuning of the monomer units.

Design and synthesis of novel polyoxometalate-based binary and ternary nanohybrids for energy conversion and storage

“…This procedure has been extended to a variety of carbon substrates, including multiwalled carbon nanotubes (MWCNT), graphene, CB, and carbon fibers, as reviewed by Genovese and Lian Covalent bonding is an important approach for the fabrication of POM/polymer hybrid materials. Thus, the obtained hybrid materials possess relatively high strength and stability, making them suitable for practical applications [107]. Streb et al reported a onedimensional (1D)-organo-functionalized POM/polymer through a covalent link [108] PPy chain (Fig.…”

Arsenotungstate-Nanostructure-Based Derivatives with One-Dimensional Tunnels for Electrochemical Capacitors and Electrocatalytic Hydrogen Evolution

“…The transition metals in the host cluster possess outstanding redox ability, which can achieve electron/ion receiving and donation without affecting their own structure. Therefore, they present many physicochemical properties superior to common metal oxides and mononuclear complexes − and are widely used in catalytic chemistry, photoelectrochemistry, medicinal chemistry, polymer conductor materials, magnetism, and other fields. The specific atomic composition and molecular structure of POMs endows them with strong coordination ability, structural tailorability, and performance tunability. − The flexible modification and assembly of POMs using functional organic ligands and various metals can yield various POM derivatives with unique structures such as 3D networks with pores, host–guest structures, and open frameworks.…”