Das Anindita, Lin Shaojian, Theato Patrick
Institute for Technical and Macromolecular Chemistry, University of Hamburg, Bundesstrasse 45, 20146 Hamburg, Germany.
ACS Macro Lett. 2017 Jan 17;6(1):50-55. doi: 10.1021/acsmacrolett.6b00898. Epub 2016 Dec 27.
Directional dipole-dipole interaction mediated antiparallel dimerization of merocyanine dye (MD) has been explored for maneuvering supramolecular assembly of MD-conjugated flexible macromolecules leading to a cross-linked nanogel. The MD-functionalized copolymer was synthesized by a newly developed organocatalytic transesterification strategy for postpolymerization functionalization of poly(pentafluorophenyl acrylate) (polyPFPA)-based reactive copolymer. Presence of ∼35% pendant MD attached to a coil-like polymer chain leads to spontaneous formation of highly emitting cross-linked nanogel with efficient container property and appreciable stability in toluene owing to strong dimerization propensity among the MD. Considering the significance of MD in the context of nonlinear optics and photovoltaics, these results not only enrich the toolbox for engineering macromolecular assembly, but also open up new possibilities for future organic materials.
已对部花青染料（MD）的定向偶极 - 偶极相互作用介导的反平行二聚化进行了探索，以操控MD共轭柔性大分子的超分子组装，从而形成交联纳米凝胶。MD功能化共聚物是通过一种新开发的有机催化酯交换策略合成的，用于基于聚（丙烯酸五氟苯酯）（聚PFPA）的反应性共聚物的后聚合功能化。附着在螺旋状聚合物链上的约35%的侧链MD的存在，由于MD之间强烈的二聚化倾向，导致自发形成具有高效封装性能且在甲苯中具有可观稳定性的高发射交联纳米凝胶。鉴于MD在非线性光学和光伏领域的重要性，这些结果不仅丰富了用于工程大分子组装的工具箱，也为未来的有机材料开辟了新的可能性。
