Multistimuli-Responsive Enaminitrile Molecular Switches Displaying H+-Induced Aggregate Emission, Metal Ion-Induced Turn-On Fluorescence, and Organogelation Properties

Ren, Yansong (författare): KTH,Organisk kemi,KTH Royal institute of technology, Sweden

Xie, Sheng (författare): KTH,Organisk kemi,KTH Royal institute of technology, Sweden;Hunan Univ, China

Svensson Grape, Erik (författare): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Inge, A. Ken (författare): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Ramström, Olof (författare): KTH,Linnéuniversitetet,Institutionen för kemi och biomedicin (KOB),KTH Royal institute of technology, Sweden;Univ Massachusetts Lowell, USA,Linnaeus Ctr Biomat Chem, BMC;BBCL,Organisk kemi

(creator_code:org_t)

2018-10-11
2018
Engelska.
Ingår i: Journal of the American Chemical Society. - : American Chemical Society (ACS). - 0002-7863 .- 1520-5126. ; 140:42, s. 13640-13643

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Abstract Ämnesord

Stäng

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.

Av författaren/redakt...: Ren, Yansong; Xie, Sheng; Svensson Grape, ...; Inge, A. Ken; Ramström, Olof

Om ämnet

Av lärosätet: Linnéuniversitetet; Kungliga Tekniska Högskolan; Stockholms universitet

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