Solution-Processable Porous Nanoparticles of a Conjugated Ladder Polymer Network,Macromolecules

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Solution-Processable Porous Nanoparticles of a Conjugated Ladder Polymer Network
Macromolecules ( IF 5.1 ) Pub Date : 2020-01-23 , DOI: 10.1021/acs.macromol.9b02635
Alexander J. Kalin ₁ , Sai Che ₁ , Chenxu Wang ₂ , Anthony U. Mu ₁ , E. Meir Duka ₁ , Lei Fang _{1,

2}

Affiliation

Conjugated ladder polymers possess multiple-stranded bonds which impart rigidity into their backbones. This rigidity can promote π-orbital delocalization for improved electronic and optical properties, or preserve interchain void space to render microporosity. Limited solution processability, however, often impedes their practical applications. To address this challenge, nanoparticulated, cross-linked ladder polymer networks were synthesized through miniemulsion polymerization followed by ring-closing olefin metathesis. The size of the nanoparticles was constrained to ∼200 nm, affording dispersibility in organic solvents and well-defined solution-phase optical properties. The rigid, cross-linked, and conjugated ladder-type network imbued the particles with microporosity while remaining colloidally stable without external stabilization. The nanoparticles were also processed into thin films and into freestanding composites with a polymer matrix as a proof of concept for their future application as functional materials.

中文翻译：

共轭梯形聚合物网络的可溶液处理的多孔纳米粒子

共轭梯形聚合物具有多链键，可将刚性赋予其主链。这种刚性可以促进π轨道离域以改善电子和光学性质，或保留链间空隙空间以产生微孔性。但是，有限的解决方案可处理性通常会阻碍其实际应用。为了应对这一挑战，通过细乳液聚合，然后进行闭环烯烃复分解反应，合成了纳米颗粒，交联的梯形聚合物网络。纳米粒子的尺寸限制在〜200 nm，提供在有机溶剂中的分散性和明确的溶液相光学性质。刚性的，交联的和共轭的梯形网络使颗粒具有微孔性，同时保持胶体稳定而没有外部稳定性。

更新日期：2020-01-24

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