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Light-Controllable Ionic Conductivity in a Polymeric Ionic Liquid |
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| Authors: | Dr Hui Nie Nicole S Schauser Dr Neil D Dolinski Dr Jerry Hu Prof Craig J Hawker Prof Rachel A Segalman Prof Javier Read de Alaniz |
| Institution: | 1. Department of Chemistry and Biochemistry, University of California–Santa Barbara, Santa Barbara, CA, 93106 USA
These authors contributed equally to this work.;2. Materials Department and Materials Research Laboratory, University of California–Santa Barbara, Santa Barbara, CA, 93106 USA These authors contributed equally to this work.;3. Materials Department and Materials Research Laboratory, University of California–Santa Barbara, Santa Barbara, CA, 93106 USA;4. Department of Chemistry and Biochemistry, University of California–Santa Barbara, Santa Barbara, CA, 93106 USA |
| Abstract: | Polymeric ionic liquids (PILs) have attracted considerable attention as electrolytes with high stability and mechanical durability. Light-responsive materials are enabling for a variety of future technologies owing to their remote and noninvasive manipulation, spatiotemporal control, and low environmental impact. To address this potential, responsive PIL materials based on diarylethene units were designed to undergo light-mediated conductivity changes. Key to this modulation is tuning of the cationic character of the imidazolium bridging unit upon photoswitching. Irradiation of these materials with UV light triggers a circa 70 % drop in conductivity in the solid state that can be recovered upon subsequent irradiation with visible light. This light-responsive ionic conductivity enables spatiotemporal and reversible patterning of PIL films using light. This modulation of ionic conductivity allows for the development of light-controlled electrical circuits and wearable photodetectors. |
| Keywords: | Kation-Anion-Wechselwirkungen Diarylethen Ionische Leitfähigkeit Photoschalter Polymere ionische Flüssigkeiten |