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Photolockable Ratiometric Viscosity Sensitivity of Cyclodextrin Polypseudorotaxane with Light-Active Rotor Graft
KTH, Skolan för bioteknologi (BIO), Teoretisk kemi.ORCID-id: 0000-0001-6508-8355
Vise andre og tillknytning
2009 (engelsk)Inngår i: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 25, nr 6, s. 3482-3486Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2009. Vol. 25, nr 6, s. 3482-3486
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Identifikatorer
URN: urn:nbn:se:kth:diva-33148DOI: 10.1021/la8042457ISI: 000264145000027Scopus ID: 2-s2.0-65249180280OAI: oai:DiVA.org:kth-33148DiVA, id: diva2:413612
Merknad
QC 20110429Tilgjengelig fra: 2011-04-29 Laget: 2011-04-29 Sist oppdatert: 2017-12-11bibliografisk kontrollert

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