Synthesis and Luminescent Properties of Novel Silicon-based Electroluminescent Copolymers with Ruthenium(II)-Chelated Complexes

• Published in: Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals Molecular crystals and liquid crystals, 2001-10, Vol.370 (1), p.387-390
• Main Authors: Baek, Nam Seob, Kim, Hwan Kyu, Hwang, Gil Tae, Kim, Byeang Hyean
• Format: Article
• Language: English
• Subjects: Applied sciences; Electroluminescence; Exact sciences and technology; Heck reaction; Inorganic and organomineral polymers; Metal-to-ligand charge transfer; Physicochemistry of polymers; Preparation; Ruthenium(II)-chelated complexes; Silicon-based copolymers
• ISSN: 1058-725X
• DOI: 10.1080/10587250108030112

A new class of silicon-based alternating copolymers having Ruthenium(II)-chelated complexes was synthesized to use as electroluminescent materials by Heck reaction between organosilicon divinyl monomers and Ru(II)-chelated monomers. The incorporation of organosilicon units with the aromatic or aliphatic groups on the silicon atoms into ®-conjugated systems improved their processability and interrupted the ®-conjugation length. The maximum absorption wavelength (λ max ) of a non-chelated polymer (SiHMPhen) containing a phenanthroline (Phen) unit exhibited one strong bands at 305 nm for Phen units and a moderate peak around 350 nm for π-conjugated backbones. With an excitation wavelength of 360 nm, the PL spectrum of SiHMPhen exhibits a strong band at 420 nm in the blue region. Ru(II)-chelated copolymers showed strong absorption bands around 386-392 nm. Upon a photoexcitation with 400 nm, their PL spectra show a strong band at 430 nm in the blue region. The Ru(II)-chelated copolymers were thermally stable up to 300°C in air.