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Multistimuli-Responsive Enaminitrile Molecular Switches Displaying H+-Induced Aggregate Emission, Metal Ion-Induced Turn-On Fluorescence, and Organogelation Properties
Royal Institute of Technology.ORCID-id: 0000-0001-5807-8343
Royal Institute of Technology;Hunan Univ, Peoples Republic of China.
Stockholm University.
Stockholm University.
Vise andre og tillknytning
2018 (engelsk)Inngår i: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 140, nr 42, s. 13640-13643Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Multistimuli-responsive enaminitrile-based configurational switches displaying aggregation-induced emission (AIE), fluorescence turn-on effects, and super gelation properties are presented. The E-isomers dominated (>97%) in neutral/basic solution, and the structures underwent precisely controlled switching around the enamine C=C bond upon addition of acid/base. Specific fluorescence output was observed in response to different external input in the solution and solid states. In response to H+, configurational switching resulted in complete formation of the nonemissive Z-H+-isomers in solution, however displaying deep-blue to blue fluorescence (Phi(F) up to 0.41) in the solid state. In response to Cu-II in the solution state, the E-isomers exhibited intense, turn-on, blue-green fluorescence, which could be turned off by addition of competitive coordination. The acid/base-activated switching, together with the induced AIE-effects, further enabled the accomplishment of a responsive superorganogelator. In nonpolar solvents, a blue-fluorescent supramolecular gel was formed upon addition of acid to the E-isomer suspension. The gelation could be reversed by addition of base, and the overall, reversible process could be repeated at least five cycles.

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American Chemical Society (ACS), 2018. Vol. 140, nr 42, s. 13640-13643
HSV kategori
Forskningsprogram
Kemi, Biokemi
Identifikatorer
URN: urn:nbn:se:lnu:diva-78839DOI: 10.1021/jacs.8b09843ISI: 000448755200025PubMedID: 30351138Scopus ID: 2-s2.0-85055124605OAI: oai:DiVA.org:lnu-78839DiVA, id: diva2:1263533
Tilgjengelig fra: 2018-11-15 Laget: 2018-11-15 Sist oppdatert: 2019-08-29bibliografisk kontrollert

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