Bibliographic Details
| Title: |
Solar collectors based on luminescent 2,5-diarylimidazoles. |
| Authors: |
Marianetti, Giulia1, Lessi, Marco2, Barone, Vincenzo1, Bellina, Fabio2,3 fabio.bellina@unipi.it, Pucci, Andrea2,3 andrea.pucci@unipi.it, Minei, Pierpaolo2 |
| Source: |
Dyes & Pigments. Oct2018, Vol. 157, p334-341. 8p. |
| Subjects: |
Solar collectors, Luminescence, Arylation kinetics, Cyanoacrylates, Energy consumption |
| Abstract: |
We report on the synthesis of new fluorescent symmetrical 2,5-diaryl-1-methylimidazoles obtained in good yields by using direct C-H arylation synthetic strategies. Spectroscopic investigations in THF solution evidenced that the 2,5-diarylimidazole bearing the strong electron-withdrawing cyanoacrylate groups achieved the best trade-off between fluorescence maximum (518 nm), Stokes shift (115 nm) and a quantum yield of 25%. Highly homogeneous dispersions of the selected fluorophore in poly(methyl methacrylate) (PMMA) thin films (25 ± 5 μm of thickness) perfectly maintained the optical features in solution, thus providing a brilliant green emission and a markedly enhanced quantum yield of 55%. Photocurrent measurements of the PMMA collectors supported the use of 2,5-diaryl-1-methylimidazoles as accessible alternatives to perylene backbones for the development of LSC with optical efficiencies close to 7%. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
