posted on 2023-05-19, 18:28authored byDunne, A, Delaney, C, McKeon, A, Nesterenko, PN, Brett PaullBrett Paull, Benito-Lopez, F, Diamond, D, Florea, L
Micro-capillaries, capable of light-regulated binding and qualitative detection of divalent metal ions in continuous flow, have been realised through functionalisation with spiropyran photochromic brush-type coatings. Upon irradiation with UV light, the coating switches from the passive non-binding spiropyran form to the active merocyanine form, which binds different divalent metal ions (Zn2+, Co2+, Cu2+, Ni2+, Cd2+), as they pass through the micro-capillary. Furthermore, the merocyanine visible absorbance spectrum changes upon metal ion binding, enabling the ion uptake to be detected optically. Irradiation with white light causes reversion of the merocyanine to the passive spiropyran form, with simultaneous release of the bound metal ion from the micro-capillary coating.
History
Publication title
Sensors
Volume
18
Issue
4
Article number
1083
Number
1083
Pagination
1-12
ISSN
1424-8220
Department/School
School of Natural Sciences
Publisher
Molecular Diversity Preservation International
Place of publication
Matthaeusstrasse 11, Basel, Switzerland, Ch-4057
Rights statement
Copyright 2018 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/