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Abstract : During the reporting period, we have systematically examined the role of a meta-phenylene in the tt-conjugated polymers. Resulting form its effective tt-conjugation interruption, controllable insertion of m-phenylene along the polymer backbone is demonstrated to be a useful tool for precise color tuning. Introduction of a bent angle at the m-phenylene unit also improves the molecular packing in the solid state, thereby enhancing the PL quantum efficiency in the solid state. Although original investigation is focusing on the poly(phenylene ethynylene) system, the concept has been successfully extended to poly(phenylene vinylene) system. By synthesis of polymers with defined chemical structures, we have investigated the impact of trace iodine to the luminescent properties of polymers. The results show that the Wittig-Horner reaction is a preferred method to construct the vinylene bond of trans-configuration. It is noted that there are two types of phenyl rings, i.e., m- and p-
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Abstract : During the reporting period, we have systematically examined the role of a meta-phenylene in the tt-conjugated polymers. Resulting form its effective tt-conjugation interruption, controllable insertion of m-phenylene along the polymer backbone is demonstrated to be a useful tool for precise color tuning. Introduction of a bent angle at the m-phenylene unit also improves the molecular packing in the solid state, thereby enhancing the PL quantum efficiency in the solid state. Although original investigation is focusing on the poly(phenylene ethynylene) system, the concept has been successfully extended to poly(phenylene vinylene) system. By synthesis of polymers with defined chemical structures, we have investigated the impact of trace iodine to the luminescent properties of polymers. The results show that the Wittig-Horner reaction is a preferred method to construct the vinylene bond of trans-configuration. It is noted that there are two types of phenyl rings, i.e., m- and p-
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