Abstract
A new class of silicon-based copolymers containing Ru(II)-chelated complexes for new red light-emitting materials was developed by well-known Heck reaction between distyrylsilane monomer and the difunctionalized metal-chelated complexes. Ru(II)-chelated copolymers I and II showed one strong band approximately 265–289 nm for ligand units, one strong absorption band approximately 386–392 nm for π-conjugated backbones, and a broad shoulder metal-to-ligand charge transfer band approximately 460–465 nm. Ru(II)-chelated polymers exhibited a negligibly broad band approximately 495–500 nm in the greenish blue region and one/or two strong bands in the red region at room temperature. The photoluminescent (PL) properties of all materials as a function of temperatures were also investigated. With a photoexcitation wavelength of 325 nm at various temperatures, their PL intensity approximately 673–675 nm increased gradually with decreasing temperature, due to the restraint of the thermal relaxation decay.
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