Dynamic hook-and-eye nanoparticle sponges
Dynamic hook-and-eye nanoparticle sponges
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DOI：
10.1038/nchem.432
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发表时间：
2009-12-01
期刊：
影响因子：
21.8
通讯作者：
Grzybowski, Bartosz A.
中科院分区：
文献类型：
--
作者：
Klajn, Rafal;Olson, Mark A.;Grzybowski, Bartosz A.
其中不同类型的纳米级组分可以从有机支架中捕获和/或释放的系统为构建动态的可交换功能材料提供了肥沃的基础。在这种异质系统中，组分通过可编程的非共价键相互作用彼此相互作用。在此，我们描述了聚合物，捕获和释放功能化的纳米粒子选择性氧化还原控制的聚集和解聚，分别。聚合物和纳米颗粒之间的相互作用是由可逆形成的聚多齿紫杉烷介导的，并产生从由几个纳米颗粒组成的短链到由聚合物交联的纳米颗粒的扩展网络的架构。在后一种情况下，聚合物/纳米颗粒聚集体从溶液中沉淀，使得聚合物充当用于捕获/释放不同类型的纳米颗粒的选择性“海绵”。
Systems in which nanoscale components of different types can be captured and/or released from organic scaffolds provide a fertile basis for the construction of dynamic, exchangeable functional materials. In such heterogeneous systems, the components interact with one another by means of programmable, noncovalent bonding interactions. Herein, we describe polymers that capture and release functionalized nanoparticles selectively during redox-controlled aggregation and disaggregation, respectively. The interactions between the polymer and the NPs are mediated by the reversible formation of polypseudorotaxanes, and give rise to architectures ranging from short chains composed of few nanoparticles to extended networks of nanoparticles crosslinked by the polymer. In the latter case, the polymer/nanoparticle aggregates precipitate from solution such that the polymer acts as a selective 'sponge' for the capture/release of the nanoparticles of different types.