Micro-Capillary Coatings Based on Spiropyran Polymeric Brushes for Metal Ion Binding, Detection, and Release in Continuous Flow

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...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2018-04, Vol.18 (4), p.1083
Main Authors: Dunne, Aishling, Delaney, Colm, McKeon, Aoife, Nesterenko, Pavel, Paull, Brett, Benito-Lopez, Fernando, Diamond, Dermot, Florea, Larisa
Format: Article
Language:English
Subjects:
Binding
Capillaries
Coatings
Cobalt
Continuous flow
Ions
Irradiation
metal ion uptake and release
Metal ions
Metals
micro-capillary
photochromism
polymer brushes
Reversion
ROMP
self-indicating system
sensors
spiropyrans
White light
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Description
Summary: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 (Zn , Co , Cu , Ni , Cd ), 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.
ISSN:1424-8220
1424-8220
DOI:10.3390/s18041083