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The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...
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1,8-Dioxapyrene-based electrofluorochromic supramolecular hyperbranched polymers.

Shuai Qiu1, Zhao Gao, Fei Yan

  • 1MOE Key Laboratory of Material Physics and Chemistry under Extraordinary conditions, Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Science, Northwestern Polytechnical University, Xi'an, 710072, P. R. China. happytw_3000@nwpu.edu.cn.

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Researchers developed a new supramolecular polymer using 1,8-dioxapyrene and europium ions. This novel material exhibits tunable multicolor electrofluorochromism, suitable for advanced anti-counterfeiting applications.

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Coordination Chemistry

Background:

  • 1,8-dioxapyrene derivatives are known for their photophysical properties.
  • Europium (Eu3+) ions are utilized for their characteristic luminescence.
  • Supramolecular polymers offer tunable properties through self-assembly.

Purpose of the Study:

  • To construct a novel electrofluorochromic supramolecular polymer.
  • To investigate the multicolor tunable capacity of the polymer.
  • To explore the potential of the polymer in anti-counterfeiting applications.

Main Methods:

  • Synthesis of a 1,8-dioxapyrene-based monomer.
  • Coordination of terpyridine ligands with Eu3+ ions.
  • Characterization of the resulting supramolecular polymer's electrofluorochromic properties.

Main Results:

  • Successful construction of a 1,8-dioxapyrene-based supramolecular polymer.
  • Demonstration of multicolor tunable electrofluorochromic behavior.
  • Observation of intriguing electrofluorochromic phenomena upon electrical stimulation.

Conclusions:

  • The novel supramolecular polymer exhibits promising electrofluorochromic properties.
  • The material's tunable color and responsiveness make it suitable for advanced applications.
  • Potential use in high-security anti-counterfeiting inks and devices.