Ionic Covalent Organic Frameworks Consisting of Tetraborate Nodes and Flexible Linkers

Author:

Wayment Lacey J.1,Huang Shaofeng1,Chen Hongxuan1,Lei Zepeng1,Ley Ashley1,Lee Se‐Hee2,Zhang Wei1ORCID

Affiliation:

1. Department of Chemistry University of Colorado Boulder Boulder CO 80309 USA

2. Department of Mechanical Engineering University of Colorado Boulder Boulder CO 80309 USA

Abstract

AbstractCovalent organic frameworks (COFs) have emerged as versatile materials with many applications, such as carbon capture, molecular separation, catalysis, and energy storage. Traditionally, flexible building blocks have been avoided due to their potential to disrupt ordered structures. Recent studies have demonstrated the intriguing properties and enhanced structural diversity achievable with flexible components by judicious selection of building blocks. This study presents a novel series of ionic COFs (ICOFs) consisting of tetraborate nodes and flexible linkers. These ICOFs use borohydrides to irreversibly deprotonate the alcohol monomers to achieve a high degree of polymerization. Structural analysis confirms the dia topologies. Reticulation is explored using various monomers and metal counterions. Also, these frameworks exhibit excellent stability in alcohols and coordinating solvents. The materials have been tested as single‐ion conductive solid‐state electrolytes. ICOF‐203‐Li displays one of the lowest activation energies reported for ion conduction. This tetraborate chemistry is anticipated to facilitate further structural diversity and functionality in crystalline polymers.

Publisher

Wiley

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