聚间亚苯亚乙烯的性能研究

SYNTHESIS AND PROPERTIES OF POLY(m-PHENYLENEVINYLENE)

Regioregular poly(1-butoxy-2,4-m-phenylenevinylene) was synthesized by Wittig reaction with salicylaldehyde as the starting material,and its properties were compared with poly(2,5-dibutoxy-1,4-p-phenylenevinylene-alter-p-phenylenevinylene) (Bu-PPV) and poly(2,5-dibutoxy-1,4-p-phenylenevinylene-alter-m-phenylenevinylene) (Bu-PMPV).The results showed that the introduction of m-phenylene could obviously improve the solubility.Thus,the solubility of Bu-PMPV was almost one order of magnitude higher than that of Bu-PPV,and Bu-MPV had a solubility 2～5 times of that of Bu-PMPV.The introduction of m-phenylene also caused obvious blue-shifts in the UV-Vis absorption and fluorescence spectra.The UV-Vis spectrum of Bu-MPV in CHCl 3 showed one absorption band λ max at 316、nm.The fluorescence of Bu-MPV solution in CHCl 3 exhibited a very narrow emission peak with emission maxima at about 419 and 434、nm,the full width at half-maximum of the emission peak is about 60、nm.

Regioregular poly (1-butoxy-2, 4-m-phenylenevinylene) was synthesized by Wittig reaction with salicylaldehyde as the starting material, and its properties were compared with poly (2, 5-dibutoxy-1, 4-p-phenylenevinylene-alter-p-phenylenevinylene) (Bu-PPV) and poly (2, 5-dibutoxy-1, 4-p-phenylenevinylene-alter-m-phenylenevinylene) (Bu-PMPV). The results showed that the introduction of m-phenylene could obviously improve the solubility. Thus, the solubility of Bu-PMPV was almost one order of magnitude higher than that of Bu-PPV, and Bu-MPV had a solubility 2 similar to 5 times of that of Bu-PMPV. The introduction of m-phenylene also caused obvious blue-shifts in the UV-Vis absorption and fluorescence spectra. The UV-Vis spectrum of Bu-MPV in CHCl3 showed one absorption band lambda(max) at 316 nm. The fluorescence of Bu-MPV solution in CHCl3 exhibited a very narrow emission peak with emission maxima at about 419 and 434 nm, the full width at half-maximum of the emission peak is about 60 nm.