Projects per year
Intrinsically microporous polyamines (PIM-EA-TB) provide tertiary amine binding sites for protons and in this way allow switching/gating from a low ionic conductivity state to semipermeable anion conductivity through micropores. In ethanolic NaClO 4 media ionic conductivity in PIM-EA-TB films (approx. 10 μm thick; deposited asymmetrically onto a 10 μm diameter microhole in 5 μm thick Teflon) is lowered by ion exclusion compared to conductivity observed in aqueous environments. However, in the presence of protons in ethanol PIM-EA-TB films are shown to switch from essentially insulating to anionic diode behaviour. Similar observations are reported for Cu 2+ but not for other types of cations such as Na +, K +, Mg 2+ (all as perchlorate salts). Binding constants are evaluated, and protonation is identified to cause gating for both H + and Cu 2+. Both chemical and electrochemical gating/switching is demonstrated by placing a platinum electrode close to the PIM-EA-TB film and applying positive or negative bias to locally generate acid/base.
- Ion transport
ASJC Scopus subject areas
- Analytical Chemistry
- Chemical Engineering(all)
FingerprintDive into the research topics of 'Switching Ionic Diode States with Proton Binding into Intrinsically Microporous Polyamine Films (PIM-EA-TB) Immersed in Ethanol'. Together they form a unique fingerprint.
- 1 Finished
Applying Long-Lived Metastable States in Switchable Functionality via Kinetic Control of Molecular Assembly
1/11/12 → 30/04/18
Project: Research council
Material and Chemical Characterisation (MC2)