Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.349, 423-426, 2000
Synthesis and luminescent properties of hyperbranched poly(P-phenylene)s by molecular architecture engineering
synthesized by both Suzuki reaction and a nickel-catalyzed Grignard coupling reaction. P(4)8 and P(4)10 showed the UV absorption band at the longer wavelength than P(3)8 and P(3)10, even though they have the same number of consecutive phenyl groups. Photoluminescent (PL) spectra of P(4)8 and P(4)10 showed a blue emission at 490-496 nm, while P(3)8 and P(3)10 thin films showed a maximum PL peak around 420-440 nm in the deep blue region.