首页|Y-shaped alkynylimidazoles as effective push-pull fluorescent dyes for luminescent solar concentrators(LSCs)
Y-shaped alkynylimidazoles as effective push-pull fluorescent dyes for luminescent solar concentrators(LSCs)
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NSTL
The synthesis of three 2-arylalkynyl-4,5-diarylimidazoles endcapped with typical electron-donating(ED)and electron-withdrawing(EW)groups(push-pull system)and their evaluation as fluorescent dyes for thin-film luminescent solar concentrators(LSCs)is described.These novel Y-shaped imidazole-based fluorophores were easily assembled in good chemical yields through a three-step synthetic sequence involving a double Suzuki arylation,followed by a dehydrogenative alkynylation,and a Knoevenagel condensation.Their optical and spectroscopic properties were analyzed both in solution and in poly(methyl methacrylate)(PMMA)films.All the molecules in PMMA films showed an intense,red-shifted emission between 540 and 575 nm with large Stokes shift(>120 nm),moderate-to-good fluorescence quantum yields(QY)and good device efficiencies(η_(dey)),especially for compound 3.
Push-pull azole-based fluorophoresAlkynylimidazolesCross-dehydrogenative couplingFluorescencePMMA filmsLuminescent solar concentrators
Elisabetta Rosadoni、Fabio Bellina、Marco Lessi
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Dipartimento di Chimica e Chimica Industriale,Universita di Pisa,Via Giuseppe Moruzzi 13,56124,Pisa,Italy
NSTL
