External and internal quenching in photochemical reactions of vinylbenzophenone-vinyl ferrocene copolymers

摘要: Abstract The quantum yield of the photochemical reaction benzophenone group, either free or bound to a macromolecular chain in polyvinylbenzophenone, with proton donor (isopropanol) has been measured absence and presence an efficient triplet acceptor (Ferrocene), (external) copolymerized (internal quenching). From analysis yields Stern-Volmer constants using proper local concentration, it is concluded that energy migration along polymer negligible this system at time scale life-time (≈ 10−7 sec). Re-examination data Lukac et al. on polyvinylphenylketone, taking account shows last however even shorter life-time.