Synthesis, light-harvesting and energy-transfer properties of regioregular silylene-spaced alternating [(donor-SiMe2-)(n=1-3)-(acceptor-SiMe2)] copolymers.
Synthesis, light-harvesting and energy-transfer properties of regioregular silylene-spaced alternating [(donor-SiMe2-)(n=1-3)-(acceptor-SiMe2)] copolymers.
复制标题
区域规则性硅烯间隔交替[(施主-SiMe2-)(n=1-3)-(受主-SiMe2)]共聚物的合成、光捕获和能量传输性能。
作者：
Yen‐Ju Cheng;T. Luh
以双炔和双硅氢化物为原料，在Rh催化下，合成了一系列硅烯间隔交替[(给体-SiMe2)(n=1-3)-(受体-SiMe2)]共聚物4-6。制备具有相似生色团成分的单体参考化合物7-10用于比较。供体和受体基团的比例由重复单元的精确区域化学和性质很好地控制。硅烯部分作为发色团之间的绝缘间隔物。聚合物表现出捕光能力，其发光强度随施主受体比的增大而增强。在荧光光谱中没有观察到来自给体的发射，这表明链内能量沿聚合物链的转移是高效的。
A series of silylene-spaced alternating [(donor-SiMe2)(n=1-3)-(acceptor-SiMe2)] copolymers 4-6 was synthesized by rhodium-catalyzed hydrosilylation of bisalkynes with bissilyl hydrides. Monomeric reference compounds 7-10 with similar chromophore components were prepared for comparison. The ratio of donor to acceptor groups is well-controlled by the precise regiochemistry and nature of the repeat units. The silylene moieties serve as insulating spacers between chromophores. The polymers exhibit light-harvesting abilities, for which the intensity of the emission enhanced with larger donor-to-acceptor ratios. No emission originating from the donors was observed in fluorescence spectra, illustrating that intrachain energy transfer is highly efficient along the polymer chain.