Spiropyran, chromene and spirooxazine, mélange á trois: Molecular logic systems through selective and reversible deactivation of photochromism mediated by CO2 gas

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dc.contributor.authorDarwish, TAen_AU
dc.contributor.authorEvans, RAen_AU
dc.contributor.authorHanley, TLen_AU
dc.date.accessioned2012-02-22T00:42:04Zen_AU
dc.date.available2012-02-22T00:42:04Zen_AU
dc.date.issued2012-02-01en_AU
dc.date.statistics2012-02-22en_AU
dc.description.abstractWe report a new expanded molecular logic system based upon combinations of spiropyrans, spirooxazines and chromenes, whereby the photochromism of some molecules can be selectively preserved while reversibly deactivating the photochromism of others. The non-photochromic molecules can be reversibly activated by CO2 gas. It was found that the photochromic effect of spiropyrans, in general, and one spirooxazine (with a hydroxyl group on the naphtho-ring) could be reversibly deactivated by DBU, while a chromene and an unsubstituted spirooxazine remained photochromic in the system under the same conditions. The presence of protic solvent was necessary for the deactivation of some of these photochromic molecules and hence it was used as an additional sensitizer in the system. This afforded the expansion of stimuli for molecular logic operations and allowed combinations of the benign stimuli of UV, visible light, CO2, and CO2 depleted with protic and aprotic solvents. This effect provided the mechanism for molecular logic systems that do not suffer from the usual problems of dilution effects and hence become truly reversible. This is highly significant when designing molecular switches to perform logic operations. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.en_AU
dc.identifier.citationDarwish, T. A., Evans, R. A., Hanley, T. L. (2012). Spiropyran, chromene and spirooxazine, mélange á trois: molecular logic systems through selective and reversible deactivation of photochromism mediated by CO2 gas. Dyes and Pigments, 92(2), 817-824. doi:10.1016/j.dyepig.2011.03.021en_AU
dc.identifier.govdoc3802en_AU
dc.identifier.issn0143-7208en_AU
dc.identifier.issue2en_AU
dc.identifier.journaltitleDyes and Pigmentsen_AU
dc.identifier.pagination817-824en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.dyepig.2011.03.021en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4057en_AU
dc.identifier.volume92en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectMoleculesen_AU
dc.subjectCarbon dioxideen_AU
dc.subjectSolventsen_AU
dc.subjectSensitizersen_AU
dc.subjectPyronesen_AU
dc.subjectDilutionen_AU
dc.titleSpiropyran, chromene and spirooxazine, mélange á trois: Molecular logic systems through selective and reversible deactivation of photochromism mediated by CO2 gasen_AU
dc.typeJournal Articleen_AU
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