10.1021/ma100814v
This research focused on the synthesis and characterization of π-conjugated polymers containing organoboron benzo[h]quinolate in the main chain, with the aim of leveraging their promising optical properties for applications such as chemical probes, photosensitizers, and optical sensing. The study demonstrated that the introduction of organoboron benzo[h]quinolate into the polymer backbone enhances the fluorescence quantum yield and leads to a bathochromic shift in the absorption peaks due to the extended π-conjugation. The researchers successfully prepared low-molecular-mass organoboron benzo[h]quinolate complexes and main-chain-type organoboron benzo[h]quinolate polymers using Sonogashira-Hagihara coupling in moderate yields. Key chemicals used in the process included 10-hydroxybenzo[h]quinoline, triphenylborane, 1,4-diethynyl-2,5-dihexadecyloxybenzene, and 1,4-diethynyl-2-perfluorooctyl-5-trifluoromethylbenzene, among others. The conclusions highlighted the efficient energy transfer from the π-conjugated main chain to the benzo[h]quinolate ligand, resulting in higher quantum yields for the polymers compared to the low-molecular-mass model compound.