Colourless p-phenylene-spaced bis-azoles for luminescent concentrators

摘要: Abstract We report on the synthesis of new push-pull imidazole-benzothiazole and thiazole-benzothiazole fluorophores obtained in good yields by using direct C H arylation synthetic strategies. Spectroscopic investigations CHCl 3 solution evidenced that 1,4-phenylene-spaced bearing an electron-donating dimethylamino group achieved a trade-off between fluorescence maximum (516 nm), Stokes shift (165 nm) quantum yield higher than 0.4. Dispersions selected fluorophore poly (methyl methacrylate) (PMMA) thin films mostly maintained optical features with significant light transmittance visible region (90% at 440 nm), brilliant green emission 500 nm. Photocurrent experiments performed PMMA coated over high purity transparent glasses promoted their use development colourless luminescent solar concentrators efficiencies close to 6%.