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Photopatternable ionogels for electrochromic applications

Kavanagh, Andrew and Copperwhite, Robert and Oubaha, Mohamed and Owens, Jessica and McDonagh, Colette and Diamond, Dermot and Byrne, Robert (2011) Photopatternable ionogels for electrochromic applications. Journal of Materials Chemistry, 21 . pp. 8687-8693. ISSN 0959-9428

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Abstract

This work describes the development of photopatternable ionogels based on a hybrid organic/inorganic sol–gel material and both phosphonium (trihexyltetradecylphosphonium dicyanamide [P6,6,6,14][dca], trihexyltetradecylphosphonium bis(trifluoromethanesulfonyl)-amide [P6,6,6,14][NTf2]) and imidazolium (1-ethyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate [emIm][FAP]) room temperature ionic liquids (RTILs). Ionogels were prepared via a two step process with the RTIL content varied between 40 and 80 w/w%, and characterised via Raman and Electrochemical Impedance Spectroscopy. 1 and 2 photon polymerisation was performed on the hybrid ionogels using photolithography, resulting in three dimensional structures that were characterised using scanning electron microscopy. Electrochromic ionogels were prepared by addition of ethyl viologen dibromide (EV) to an ionogel containing [emIm][FAP] and hybrid sol–gel material. This composition was photopolymerised on ITO electrodes by UV irradiation and subsequentially characterised via UV/Vis spectroelectrochemistry. It was also possible to fabricate a solid state electrochromic device based on EV and switch between the colourless (oxidised) and blue (reduced) forms using a perturbation signalof 1 V.

Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:ionogels
Subjects:Physical Sciences > Electrochemistry
Physical Sciences > Chemistry
Physical Sciences > Photonics
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Chemical Sciences
Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Research Initiatives and Centres > National Centre for Sensor Research (NCSR)
Publisher:Royal Society of Chemistry
Official URL:http://dx.doi.org/DOI: 10.1039/C1JM10704F
Copyright Information:© 2011 Royal Society of Chemistry.
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Science Foundation Ireland grant 07/CE/I1147 , SFI National Access Programme (NAP) grant NAP210, Enterprise Ireland grant 07/RFP/MASF812, which is part of EU-MATERA initiative
ID Code:16364
Deposited On:15 Jul 2011 14:24 by Andrew Kavanagh. Last Modified 05 Apr 2012 04:02

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