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Issue 25, 2012
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Self-assembly and luminescence of pyrazole supergelators

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Abstract

Functional supramolecular organogelators containing a luminescent 4-arylpyrazole unit are described. Moreover, the compounds show supergelator behaviour. The synthesised molecules combine a 1H-pyrazole ring, an amide group and a trialkoxyphenyl group. The study of the gelation process and the structure–property relationship reveals that both the pyrazole and the amide groups are essential for the H-bonding driven gelation process. Chiral derivatives with a similar chemical structure are able to amplify molecular chirality through the formation of aggregates and gel fibers with supramolecular chirality by a cooperative self-assembly mechanism which follows a nucleation–elongation model. The compounds are luminescent in solution and they are able to enhance this property in the gel, exhibiting a remarkable aggregation-induced enhancement of emission (AIEE effect). Therefore, these novel molecules are able to efficiently amplify properties such as chirality and luminescence from the molecular level to the macroscopic level.

Graphical abstract: Self-assembly and luminescence of pyrazole supergelators

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Publication details

The article was received on 28 Mar 2012, accepted on 16 Apr 2012 and first published on 23 May 2012


Article type: Paper
DOI: 10.1039/C2SM25726B
Citation: Soft Matter, 2012,8, 6799-6806
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    Self-assembly and luminescence of pyrazole supergelators

    S. Moyano, J. L. Serrano, A. Elduque and R. Giménez, Soft Matter, 2012, 8, 6799
    DOI: 10.1039/C2SM25726B

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