Characterizing the photoinduced switching process of a nitrospiropyran self-assembled monolayer using in situ sum frequency generation spectroscopy

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dc.contributor.authorDarwish, TAen_AU
dc.contributor.authorTong, YJen_AU
dc.contributor.authorJames, Men_AU
dc.contributor.authorHanley, TLen_AU
dc.contributor.authorPeng, QLen_AU
dc.contributor.authorYe, Sen_AU
dc.date.accessioned2014-04-24T04:03:31Zen_AU
dc.date.available2014-04-24T04:03:31Zen_AU
dc.date.issued2012-10-02en_AU
dc.date.statistics2014-04-24en_AU
dc.description.abstractSum frequency generation (SFG) vibrational spectroscopy is employed to investigate the reversible, photoinduced spiro -> merocyanine isomerization of a self-assembled monolayer, the result of attachment of nitrospiropyran to a gold surface using a dithiolane anchoring group. The attachment of these molecular "alligator clips" to spiropyran molecules provide an easily accessible method to self-assemble a robust monolayer of spiropyran on a gold surface, which allows photoswitching of the spiropyran units. Probing the symmetric and antisymmetric stretching modes of the nitro group allows the determination of the structural orientation of the charged moiety with respect to the surface normal as well as the isomerization rates under photoinduced switching conditions. The photoisomerization of the spiropyran SAM on the gold surface is much faster than the rates of switching spiropyrans in a solid crystalline form, and the rate of thermal relaxation of the opened to closed form in this study is found to be on the same time scale as the relaxation of spiropyran when present in solutions with polar solvents. © 2012, American Chemical Society.en_AU
dc.identifier.citationDarwish, T. A., Tong, Y. J., James, M., Hanley, T. L., Peng, Q. L., & Ye, S. (2012). Characterizing the photoinduced switching process of a nitrospiropyran self-assembled monolayer using in situ sum frequency generation spectroscopy. Langmuir, 28(39), 13852-13860. doi:10.1021/la302204fen_AU
dc.identifier.govdoc4579en_AU
dc.identifier.issn0743-7463en_AU
dc.identifier.issue39en_AU
dc.identifier.journaltitleLangmuiren_AU
dc.identifier.pagination13852-13860en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/la302204fen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5482en_AU
dc.identifier.volume28en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectSpectroscopyen_AU
dc.subjectIsomerizationen_AU
dc.subjectGolden_AU
dc.subjectSolventsen_AU
dc.subjectFluorescenceen_AU
dc.subjectTransistorsen_AU
dc.titleCharacterizing the photoinduced switching process of a nitrospiropyran self-assembled monolayer using in situ sum frequency generation spectroscopyen_AU
dc.typeJournal Articleen_AU
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