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RESEARCH PRODUCT
Insights into the effect of the spacer on the properties of imidazolium based AIE luminogens
Carla RizzoVincenza AccursoSalvatore MarulloMarta FerociFrancesca D'annasubject
Materials scienceProcess Chemistry and TechnologyGeneral Chemical Engineeringaggregation induced emission; imidazolium salts; self-assemblySupramolecular chemistryMolecular electronicsSettore CHIM/06 - Chimica Organicaself-assembly02 engineering and technologyimidazolium salts010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesFluorescenceaggregation induced emission0104 chemical scienceschemistry.chemical_compoundDifferential scanning calorimetrychemistryChemical engineeringIonic liquidImidazoleSelf-assemblyCyclic voltammetry0210 nano-technologydescription
Abstract With the aim to obtain organic salts with potential applications in high performance molecular electronics, we combined properties of π-conjugated spacers, like 1,4-diethynylbenzene and 1,6-diethynylpyrene, with the ones of both imidazole and imidazolium units. Physico-chemical properties of obtained fluorescent organic salts were investigated performing thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC) and cyclic voltammetry measurements (CV). Photophysical behavior of the salts was analyzed in conventional solvents and ionic liquids, by UV–vis and fluorescence investigation. Solution phase aggregation study revealed that these salts self-assemble in conventional solvents and ionic liquids, leading to aggregation induced emission processes. Notably, emission was maintained also in the solid state, with higher or lower intensity compared with the solution, depending on which spacer is present. This latter, also impacts on the morphology of the aggregates, allowing fine tuning the properties of the supramolecular materials formed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-02-01 | Dyes and Pigments |