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Spiropyran polymeric microcapillary coatings for photodetection of solvent polarity

Florea, Larisa and McKeon , Aoife and Diamond, Dermot and Benito-Lopez, Fernando (2013) Spiropyran polymeric microcapillary coatings for photodetection of solvent polarity. Langmuir, 29 (8). pp. 2790-2797. ISSN 0743-7463

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Abstract

Fused silica micro-capillaries were functionalised with spiropyran-polymer brushes using surface-initiated ring-opening metathesis polymerisation. Based on the inherited spiropyran properties, the functionalised capillaries were successfully used to photo-identify solvents of different polarity when passing through the micro-capillary in continuous flow. In the present study, six different solvents (toluene, tetrahydrofuran, acetone, acetonitrile, ethanol and methanol) can be easily detected while passing through the modified micro-capillary by simply irradiating a portion of it with UV light (365 nm). This converts the closed spiropyran moiety to the open merocyanine form and as a consequence, the micro-capillary gains a distinct colour and spectral response depending on the polarity of the solvent. The rate of ring opening of the spiropyran-polymer brushes coatings has been determined in-situ in the presence of different solvents, showing that the coloration rate is also influenced by the solvent polarity and therefore can be used as an additional parameter for solvent sensing.

Item Type:Article (Published)
Refereed:Yes
Subjects:Physical Sciences > Chemistry
DCU Faculties and Centres:Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Publisher:American Chemical Society
Official URL:http://dx.doi.org/10.1021/la304985p
Copyright Information:© 2013 ACS
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Irish Research Council (IRC) - Embark Initiative, Science Foundation Ireland under the CLARITY award (07/CE/I1147)
ID Code:17791
Deposited On:28 Feb 2013 15:02 by Larisa Florea. Last Modified 01 Feb 2017 09:48

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