Photoswitchable Layer-by-Layer Coatings Based on Photochromic Polynorbornenes Bearing Spiropyran Side Groups
| Autor: | Paula Pereira Campos, Colm Delaney, Dermot Diamond, Simon E. Moulton, Larisa Florea, Aishling Dunne, Marystela Ferreira, Cara Moloney, Fernando Benito-Lopez |
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| Rok vydání: | 2018 |
| Předmět: |
spiropyrans
Materials science Photochemistry Scanning electron microscope Organic chemistry coatings 02 engineering and technology polymer brushes sensors 010402 general chemistry 01 natural sciences Absorbance ROMP chemistry.chemical_compound Photochromism Ellipsometry self-indicating system Electrochemistry General Materials Science Merocyanine Spectroscopy metal ion uptake and release Spiropyran Layer-by-Layer Photo-responsive Photochromic Coatings Bilayer Layer by layer Surfaces and Interfaces photochromism 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Chemistry chemistry 0210 nano-technology micro-capillary |
| Zdroj: | Addi. Archivo Digital para la Docencia y la Investigación instname Campos, Paula, Dunne, Aishling, Delaney, Colm ORCID: 0000-0002-4397-0133 |
| ISSN: | 1520-5827 |
| Popis: | 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. This project has been funded by Science Foundation Ireland under the Insight initiative, grant SFI/1 /RC/2289. CD and DD also acknowledge the SFI under the Technology Innovation Development Award no. 16/TIDA/4183. F.B.L. acknowledges the Ramón y Cajal Programme (Ministerio de Economía y Competitividad) and Gobierno de España, Ministerio de Economía y Competitividad, with Grant No. BIO2016-80417-P. |
| Databáze: | OpenAIRE |
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