CO2 triggering and controlling orthogonally multiresponsive photochromic systems

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dc.contributor.authorDarwish, TAen_AU
dc.contributor.authorEvans, RAen_AU
dc.contributor.authorJames, Men_AU
dc.contributor.authorMalic, Nen_AU
dc.contributor.authorTriani, Gen_AU
dc.contributor.authorHanley, TLen_AU
dc.date.accessioned2010-08-30T03:53:53Zen_AU
dc.date.available2010-08-30T03:53:53Zen_AU
dc.date.issued2010-08-11en_AU
dc.date.statistics2010-08-11en_AU
dc.description.abstractWe report a new generic method of reversibly controlling the photochromism of spiropyrans. It was found that the photochromic effect of spiropyrans can be reversibly switched on and off by addition and removal of carbon dioxide (CO2) to spiropyran in alcohol solutions containing an amidine (i.e., DBU) that acts as a CO2 sensitizer. Spiropyrans are not photochromic in the presence of DBU but photochromic when CO2 is subsequently added to the solution. The CO2 is readily removed by inert gas bubbling, thus allowing facile activation and deactivation of the photochromic effect. Carbon dioxide, without the presence of the sensitizing amidine, had no effect on photochromism of the spiropyrans. Other photochromic dyes classes such as spirooxazines and chromenes are not affected by this CO2/DBU stimulus. As a result, orthogonal activation of mixtures of spirooxazines and spiropyrans was achieved to provide four color states (clear, yellow, green, and blue) by varying the combinations of the stimuli of UV, visible light, CO2, and CO2 depleted. This finding now permits the many applications using spiropyrans to be CO2 responsive. © 2010, American Chemical Societyen_AU
dc.identifier.citationDarwish, T. A., Evans, R. A., James, M., Malic, N., Triani, G., & Hanley, T. L. (2010). CO2 triggering and controlling orthogonally multiresponsive photochromic systems. Journal of the American Chemical Society, 132(31), 10748-10755. doi:10.1021/ja1013322en_AU
dc.identifier.govdoc2543en_AU
dc.identifier.issn0002-7863en_AU
dc.identifier.issue31en_AU
dc.identifier.journaltitleJournal of the American Chemical Societyen_AU
dc.identifier.pagination10748-10755en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/ja1013322en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2363en_AU
dc.identifier.volume132en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectCarbon dioxideen_AU
dc.subjectPhotochromic materialsen_AU
dc.subjectAmidinesen_AU
dc.subjectControl systemsen_AU
dc.subjectOrthogonal transformationsen_AU
dc.subjectResponse functionsen_AU
dc.titleCO2 triggering and controlling orthogonally multiresponsive photochromic systemsen_AU
dc.typeJournal Articleen_AU
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