Plasmon-enhanced triplet–triplet annihilation upconversion of post-modified polymeric acceptors†,Dalton Transactions

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Plasmon-enhanced triplet–triplet annihilation upconversion of post-modified polymeric acceptors†
Dalton Transactions ( IF 3.5 ) Pub Date : 2018-03-08 00:00:00 , DOI: 10.1039/c8dt00269j
Emily G. Westbrook _{1,

2,

3,

4} , Peng Zhang _{1,

2,

3,

4}

Affiliation

We report the localized surface plasmon resonance (LSPR)-enhanced triplet–triplet annihilation upconversion (TTA-UC) of polymeric acceptors containing high percentages of acceptor units. A poly[(methyl methacrylate)-co-(glycidyl methacrylate)] copolymer series with increasing glycidyl methacrylate ratio was prepared using reversible addition–fragmentation chain transfer (RAFT) polymerization. After post-modification of the glycidyl group with anthracene, the acceptor unit, a series of poly[(methyl methacrylate)-co-(2-hydroxypropyl-9-anthroate methacrylate)] (polyACA) was produced with different numbers of acceptor units. These polymeric acceptors were grafted to silver nanoparticles in order to enhance the TTA-UC intensity in the polymers with higher percentages of acceptor units, where concentration quenching usually dominates. With the assistance of the silver nanoparticle LSPR, TTA-UC intensity was enhanced from the polymeric acceptor nanocomposites using platinum octaethylporphyrin as the sensitizer to form the TTA-UC systems. This method is anticipated to improve TTA-UC in the solid-state, where higher percentages of acceptor units are required, but usually cause chromophore concentration quenching, reducing TTA-UC efficiency.

中文翻译：

修饰后的聚合物受体的等离子增强三重态-三重态ni灭上转换†

我们报告了含有高百分比受体单元的聚合物受体的局部表面等离振子共振（LSPR）增强的三重态-三重态trip灭上转换（TTA-UC）。使用可逆加成-断裂链转移（RAFT）聚合反应制备了具有增加的甲基丙烯酸缩水甘油酯比例的聚[（甲基丙烯酸甲酯）-共- （甲基丙烯酸缩水甘油酯）]共聚物系列。用蒽，受体单元对缩水甘油基进行后修饰后，一系列聚[（甲基丙烯酸甲酯）-co用不同数量的受体单元生产了-（2-羟丙基-9-邻氨基甲酸酯甲基丙烯酸酯）（polyACA）。将这些聚合物受体接枝到银纳米颗粒上，以提高具有较高百分比受体单元的聚合物中的TTA-UC强度，其中浓度猝灭通常占主导地位。借助于银纳米粒子LSPR，使用八乙基卟啉铂作为敏化剂，从聚合物受体纳米复合物中增强了TTA-UC强度，从而形成了TTA-UC系统。预计该方法将改善固态的TTA-UC，其中需要更高百分比的受体单元，但通常会导致生色团浓度猝灭，从而降低TTA-UC效率。

更新日期：2018-03-08

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