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.

Intrinsically microporous polymer slows down fuel cell catalyst corrosion

“…Recently, a novel class of microporous organic materials, polymers with intrinsic microporosity (PIM), has been developed. There are a range of potential applications in gas membrane technology [15,16], in electrolyte media as ionic diode [17], and in electrochemical technology [18,19]. The structurally highly…”

pH-induced reversal of ionic diode polarity in 300 nm thin membranes based on a polymer of intrinsic microporosity

“…Interest in "ionic devices" [1,2,3,4,5] has increased over the recent years with the emergence of new nanopore technologies [6,7] and availability of new microporous materials [8]. The potential for applications of these devices ranges from analytical nanofluidic tools [9], natural cell pore mimics [10], to energy harvesting systems, and ionic rectifiers for desalination [11].…”

Redox reactivity at silver microparticle—glassy carbon contacts under a coating of polymer of intrinsic microporosity (PIM)

“…As a result, voltammetric responses for the silver microparticles are more stable and repeatable. Within the potential range studied here PIM-EA-TB has no direct electrochemical activity [13,14] and it can be considered both cation and anion conducting [15]. Generally, with the PIM-EA-TB coating applied features such as the position of oxidation and back-reduction voltammetric responses are maintained and also the complex peak shape observed during the reduction is retained.…”

“…It has been demonstrated that metal nanoparticle catalysts can be PIM-coated and thereby protected against poisoning [13] and against detrimental loss and corrosion processes [14]. Here, we employ an intrinsically microporous polymer (PIM) material based on an ethanoanthracene (EA) building block that was synthesised employing a Tröger base (TB) method (PIM-EA-TB [15], see molecular structure in Fig. 1b).…”

“…1b). This polymer material exhibits 70 kDa average molecular weight and N 2 -adsorption surface area of typically 1027 m 2 g −1 [15]. The inherent microporosity of PIM-EA-TB allows ion and small molecule transport without inhibiting the electrode reaction [16].…”