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Article

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

1
Insight Centre for Data Analytics, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
2
Australian Centre for Research on Separation Science, and ARC Centre of Excellence for Electromaterials Science, Hobart, Tasmania 7001, Australia
3
Analytical Microsystems & Materials for Lab-on-a-Chip (AMMa-LOAC) Group, Microfluidics Cluster UPV/EHU, Analytical Chemistry Department, University of the Basque Country UPV/EHU, Vitoria-Gasteiz 01006, Spain
*
Authors to whom correspondence should be addressed.
Current Address: Centre for Synthesis and Chemical Biology, Department of Pharmaceutical and Medicinal Chemistry, Royal College of Surgeons in Ireland, 123 St. Stephens Green, Dublin 2 D02 YN77, Ireland.
Sensors 2018, 18(4), 1083; https://doi.org/10.3390/s18041083
Received: 21 February 2018 / Revised: 27 March 2018 / Accepted: 29 March 2018 / Published: 4 April 2018
(This article belongs to the Special Issue I3S 2017 Selected Papers)
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.
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Keywords: spiropyrans; polymer brushes; sensors; ROMP; coatings; photochromism; metal ion uptake and release; self-indicating system; micro-capillary spiropyrans; polymer brushes; sensors; ROMP; coatings; photochromism; metal ion uptake and release; self-indicating system; micro-capillary
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MDPI and ACS Style

Dunne, A.; Delaney, C.; McKeon, A.; Nesterenko, P.; Paull, B.; Benito-Lopez, F.; Diamond, D.; Florea, L. Micro-Capillary Coatings Based on Spiropyran Polymeric Brushes for Metal Ion Binding, Detection, and Release in Continuous Flow. Sensors 2018, 18, 1083. https://doi.org/10.3390/s18041083

AMA Style

Dunne A, Delaney C, McKeon A, Nesterenko P, Paull B, Benito-Lopez F, Diamond D, Florea L. Micro-Capillary Coatings Based on Spiropyran Polymeric Brushes for Metal Ion Binding, Detection, and Release in Continuous Flow. Sensors. 2018; 18(4):1083. https://doi.org/10.3390/s18041083

Chicago/Turabian Style

Dunne, Aishling, Colm Delaney, Aoife McKeon, Pavel Nesterenko, Brett Paull, Fernando Benito-Lopez, Dermot Diamond, and Larisa Florea. 2018. "Micro-Capillary Coatings Based on Spiropyran Polymeric Brushes for Metal Ion Binding, Detection, and Release in Continuous Flow" Sensors 18, no. 4: 1083. https://doi.org/10.3390/s18041083

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