4.8 Article

Scalable Synthesis of Photoluminescent Single-Chain Nanoparticles by Electrostatic-Mediated Intramolecular Crosslinking

期刊

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202205183

关键词

Clusterization-Triggered Emission; Electrostatic Repulsion; Intramolecular Crosslinking; Single-Chain Nanoparticles

资金

  1. Key Project of Ministry of Science and Technology [2021YFC21022800]
  2. National Natural Science Foundation of China [51833005]
  3. Tsinghua University [53330100120]
  4. Swedish Research Council [2016-07213]

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In this study, we report the large-scale synthesis of photoluminescent single-chain nanoparticles through electrostatic-mediated intramolecular crosslinking in a concentrated solution. The photoluminescent properties of these nanoparticles are strong in the visible range when non-emissive units are confined within them. The composition and microstructure of these nanoparticles can be controlled, making them useful for selectively illuminating interfacial membranes and stabilizing emulsions.
We report the large-scale synthesis of photoluminescent single-chain nanoparticles (SCNPs) by electrostatic-mediated intramolecular crosslinking in a concentrated solution of 40 mg mL(-1) by continuous addition of the free radical initiator. Poly(vinyl benzyl chloride) was charged by quaternization with vinyl-imidazolium for the intramolecular crosslinking by using 2,2-dimethoxy-2-phenylacetophenone (DMAP) as the radical initiator. Under the electrostatic repulsion thus interchain isolation, the intrachain crosslinking experiences the transition from coil through pearl-necklace to globular state. The SCNPs demonstrate strong photoluminescence in the visible range when the non-emissive units are confined thereby. Composition and microstructure of the SCNPs are tunable. The photoluminescent tadpole-like Janus SCNP can be used to selectively illuminate interfacial membranes while stabilizing the emulsions.

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