Metastable Ionic Diodes Derived from an Amine‐Based Polymer of Intrinsic Microporosity

Abstract

A highly rigid amine-based polymer of intrinsic microporosity (PIM), prepared by a polymerization reaction involving the formation of Tröger's base, is demonstrated to act as an ionic diode with electrolyte-dependent bistable switchable states.

Electrocatalytic Carbohydrate Oxidation with 4-Benzoyloxy-TEMPO Heterogenised in a Polymer of Intrinsic Microporosity

“…The rigid host environment allows electron transfer from the glassy carbon substrate (probably via hopping and formation of TEMPO + cations) and the intrinsic porosity (typical pore sizes are 1-2 nm [21]) allows substrate molecules (here glucose, sorbitol, and sucrose) into contact with the catalyst. In part, diffusion in and out appear rate limiting with some evidence for "saturation" of the catalyst at higher glucose concentrations.…”

“…PIM materials have been applied also in gas storage [19] and separation [20] with benefits from a very high surface area, a highly rigid molecular structure, and novel properties relying on permanent microporosity. In electrochemical membrane systems, charged PIM poly-electrolyte materials have been shown to introduce ion selectivity, permselectivity, and novel ionic diode effects [21].…”

A highly rigid and gas selective methanopentacene-based polymer of intrinsic microporosity derived from Tröger's base polymerization

“…9,10 In particular, PIMs with the ability to form exible, robust, self-standing lms have potential as membrane materials for anionic transport, 11 the separation of gases, vapours 12 or for nanoltration. 13,14 Their exceptional potential for gas separation 15,16 is based on the high free volume generated from the inability of their contorted polymer chains to pack efficiently, which provides high permeability, while the lack of conformational freedom and rigidity, due to their fused-ring structures, ensures good permselectivity.…”

Water desalination concept using an ionic rectifier based on a polymer of intrinsic microporosity (PIM)

“…3 They are of considerable interest in analytical detection methods 4 and also have potential in energy harvesting. 6 In this study, this ion ow rectication effect is investigated in more detail, and new opportunities are proposed arising from being able to operate the ionic diode using sea water and without an externally imposed a pH gradient. Previously, we demonstrated the anion absorption capacity of an amine-containing PIM derived from Tröger's base (PIM-EA-TB; Fig.…”

“…6 When in the protonated state, the ow of ions across the membrane is restricted and dominated by anions. 6 When in the protonated state, the ow of ions across the membrane is restricted and dominated by anions.…”