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<p>Conjugated polyelectrolytes exhibit attractive photophysical properties for optoelectronic applications, but their performance is highly sensitive to their aggregation state, which remains difficult to control. Here, we demonstrate that non-porous metal-organic frameworks can template conjugated polyelectrolyte assembly into ordered, surface-bound structures with distinctive photophysical properties. We assembled poly(phenylene ethynylene) carboxylate onto crystalline zirconium formate metal-organic surfaces during framework growth, creating a hybrid material (CPM-1) that exhibits edge-localized fluorescence, altered vibronic structure, and spatially heterogeneous excited-state lifetimes. The unique photophysical properties arise from the assembly of the polymer into orientally ordered domains at crystal surfaces. Our findings demonstrate that the crystalline structure of a metal-organic framework can direct conjugated polyelectrolyte assembly in ways that are difficult to achieve using traditional methods. This new approach opens a pathway for controlling polymer organization, enabling new photophysical properties for sensing and light-harvesting applications.</p><p></p>

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Templated assembly of conjugated polyelectrolytes onto metal organic frameworks reveals unique photophysical behavior

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月6日

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  • Nour Merhi,
  • Abdullah Hakeem,
  • Alejandro Diaz-Marquez,
  • Abdelaziz Gouda,
  • Guillaume Maurin,
  • Mohamad Hmadeh,
  • Pierre Karam

摘要

Conjugated polyelectrolytes exhibit attractive photophysical properties for optoelectronic applications, but their performance is highly sensitive to their aggregation state, which remains difficult to control. Here, we demonstrate that non-porous metal-organic frameworks can template conjugated polyelectrolyte assembly into ordered, surface-bound structures with distinctive photophysical properties. We assembled poly(phenylene ethynylene) carboxylate onto crystalline zirconium formate metal-organic surfaces during framework growth, creating a hybrid material (CPM-1) that exhibits edge-localized fluorescence, altered vibronic structure, and spatially heterogeneous excited-state lifetimes. The unique photophysical properties arise from the assembly of the polymer into orientally ordered domains at crystal surfaces. Our findings demonstrate that the crystalline structure of a metal-organic framework can direct conjugated polyelectrolyte assembly in ways that are difficult to achieve using traditional methods. This new approach opens a pathway for controlling polymer organization, enabling new photophysical properties for sensing and light-harvesting applications.