✍ Scribed by Tazuke, Shigeo ;Takasaki, Ryuichiro
No coin nor oath required. For personal study only.
Three types of polymer electron transfer sensitizer were prepared by copolymerization of 1‐pyrenylmethyl methacrylate with styrene (I), vinylbenzyltriethylammonium chloride (II), and sodium p‐styrenesulfonate (III). Irradiation of the pyrenyl group in the presence of leuco crystal violet (LCV), in homogeneous or in heterogeneous systems, induced the formation of crystal violet cation (CV^+^) in air. The reactivity of I, II, and III was in the order of II > I > III in both systems; this was rationalized in terms of the Coulombic effect. The effect of charge is much greater for the heterogeneous systems. High‐charge density on the polymer surface and enhanced polymer‐solvent affinity account for the high reactivity of II. The high quantum efficiency, coupled with the advantage of facile product separation, warrants the practical application of interfacial sensitization.
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