A polyacrylate with pendant nonlinear absorption (NLA) chromophores was prepared via the reversible addition–fragmentation (RAFT)–click synthetic strategy. The polyacrylate backbone of the NLA polymer was constructed by reversible addition–fragmentation (RAFT) polymerization and subsequently modified to azide-containing “clickable polymers”. Platinum acetylide chromophores that exhibit NLA via both two-photon absorption (TPA) and excited-state absorption (ESA) mechanisms were subsequently attached to the azide-substituted polyacrylate via copper(I)-catalyzed azide–alkyne cycloaddition. The resulting polymer exhibits similar photophysical properties to the platinum acetylide precursor chromophore, including steady-state absorption and emission, triplet–triplet transient absorption, and nonlinear absorption properties. In addition, the resulting polymers can be spin-coated to afford an optically transparent film, which also preserved the nonlinear absorption characteristics of the chromophores.

中文翻译：

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受控的自由基聚合和“点击”化学作用的聚合非线性吸收发色团阵列

通过可逆加成-片段化（RAFT）-点击合成策略，制备了具有侧链非线性吸收（NLA）生色团的聚丙烯酸酯。NLA聚合物的聚丙烯酸酯主链是通过可逆加成-片段化（RAFT）聚合反应构建的，随后被改性为含叠氮化物的“可点击聚合物”。通过双光子吸收（TPA）和激发态吸收（ESA）机理均显示NLA的乙炔铂生色团随后通过铜（I）催化的叠氮化物-炔烃环加成反应与叠氮化物取代的聚丙烯酸酯连接。所得聚合物显示出与乙炔铂前体发色团相似的光物理性质，包括稳态吸收和发射，三重态-三重态瞬态吸收和非线性吸收特性。此外，