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Photolockable Ratiometric Viscosity Sensitivity of Cyclodextrin Polypseudorotaxane with Light-Active Rotor Graft
KTH, School of Biotechnology (BIO), Theoretical Chemistry.ORCID iD: 0000-0001-6508-8355
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2009 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 25, no 6, 3482-3486 p.Article in journal (Refereed) Published
Abstract [en]

A prototype, based on light-active fluorescent rotor grafted to beta-cyclodextrin, shows a good solvent viscosity-sensitive behavior due to the environment-dependent nonradiative decay. With the reversible photoisomerization of the cyanostilbene unit, the viscosity sensitivity of the molecular rotor could be locked and activated, and the two switchable states can be distinguished by fluorescent signals. This cyclodextrin derivative was threaded to form a novel polypseudorotaxane. Such supramolecular assembly displays a lockable ratiometric fluorescent viscosity sensitivity with two emission channels: one aroused by fluorophore's intramolecular excimer without influenced by viscosity is used to gauge the concentration of the compound, while the other corresponding to the monomer's rotor fluorescence acts as a viscosity-sensitive signal and it can be shut off by UV irradiation.

Place, publisher, year, edition, pages
2009. Vol. 25, no 6, 3482-3486 p.
National Category
Theoretical Chemistry
URN: urn:nbn:se:kth:diva-33148DOI: 10.1021/la8042457ISI: 000264145000027ScopusID: 2-s2.0-65249180280OAI: diva2:413612
QC 20110429Available from: 2011-04-29 Created: 2011-04-29 Last updated: 2011-04-29Bibliographically approved

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Li, Xin
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