1202792-32-2Relevant academic research and scientific papers
Aromatic ring-fused BODIPY-based conjugated polymers exhibiting narrow near-infrared emission bands
Nagai, Atsushi,Chujo, Yoshiki
, p. 193 - 200 (2010)
Three conjugated copolymers, consisted of alternating p-phenylene- ethynylene and boron di(iso)indomethene units in the backbone, were synthesized via palladium-catalyzed Sonogashira coupling reaction of 1,4-diethynyl-2,5- dihexadecyloxybenzene and three diiodophenyl-fused BODIPY monomers. The structures and properties of the conjugated polymers were characterized by 1H NMR, 11B NMR, and Fourier transform infrared (FT-IR) spectroscopies, elemental analysis, size exclusion chromatography (SEC), UV-vis absorption spectroscopy, photoluminescence (PL) spectroscopy, and theoretical calculation using density-functional theory (DFT) method. The polymers obtained were fusible and soluble in common organic solvents including THF, benzene, toluene, CHCl3, and CH2Cl2, etc. The incorporation of the indomethene monomers into p-phenylene-ethynylene main chain led to red shifts in UV-absorption and PL spectra by extended π-conjugation of the copolymers in comparison with the monomers. Accordingly, the copolymers emitted in the range from deep-red to near-infrared region with emission spectral maxima at around 691-720 nm and exhibited high quantum yields (ΦF = 33-49%). The photostabilities of the polymers were examined by monitoring decrease of the PL spectra under continuous UV irradiation using a UV lamp under aerobic conditions. Further, their thermal stabilities were also investigated by TGA measurement.
