Scholarlink

<p>Precise control over supramolecular chirality and circularly polarized luminescence (CPL) is achieved through fluorene-content engineering of alkylated fluorene-quinoxaline copolymers. By systematically varying the fluorene ratio, three polymers (F8QX, F8QX-II, F8QX-III) are synthesized and co-assembled with a chiral inducer (<i>R/S</i>-5011). Thermal annealing induces highly ordered, crosslinked superstructures with strong chiroptical activity, where the dissymmetry factor (<i>g</i><sub>lum</sub>) decreases with increasing fluorene content. The optimal system, (F8QX)<sub>0.7</sub>-(<i>R/S</i>-5011)<sub>0.3</sub>, achieves a high ∣<i>g</i><sub>lum</sub>∣ of 0.52. Structural analyses and molecular dynamics (MD) simulations reveal that lower fluorene ratios facilitate tighter π–π stacking and more efficient chirality amplification. This system further serves as an excellent host for a narrowband multi-resonance thermally activated delayed fluorescence (TADF) emitter (DBN-ICZ) via Förster resonance energy transfer, yielding ternary co-assemblies with narrowband green emission (FWHM = 25 nm) and strong CPL with <i>g</i><sub>lum</sub> of 0.43. Circularly polarized organic light-emitting diodes (CP-OLEDs) based on (F8QX)<sub>0.7</sub>-(<i>R/S</i>-5011)<sub>0.3</sub>-(DBN-ICZ)<sub>0.005</sub> exhibit yellow circularly polarized electroluminescence with ∣<i>g</i><sub>EL</sub>∣ value of 0.12. This work provides a comprehensive strategy integrating molecular design, hierarchical assembly, and energy transfer toward high-performance chiral optoelectronic materials.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Controlling supramolecular chirality and circularly polarized luminescence in co-assembled copolymers via fluorene-content engineering

  • 期刊论文

  • 发表日期：

    2026年2月25日

查看全文
  • Chao Feng,
  • Hongqing Zhao,
  • Bianxiang Zhang,
  • Benjamin P. Fingerhut,
  • Liheng Feng,
  • Meng Li,
  • Chuan-Feng Chen

摘要

Precise control over supramolecular chirality and circularly polarized luminescence (CPL) is achieved through fluorene-content engineering of alkylated fluorene-quinoxaline copolymers. By systematically varying the fluorene ratio, three polymers (F8QX, F8QX-II, F8QX-III) are synthesized and co-assembled with a chiral inducer (R/S-5011). Thermal annealing induces highly ordered, crosslinked superstructures with strong chiroptical activity, where the dissymmetry factor (glum) decreases with increasing fluorene content. The optimal system, (F8QX)0.7-(R/S-5011)0.3, achieves a high ∣glum∣ of 0.52. Structural analyses and molecular dynamics (MD) simulations reveal that lower fluorene ratios facilitate tighter π–π stacking and more efficient chirality amplification. This system further serves as an excellent host for a narrowband multi-resonance thermally activated delayed fluorescence (TADF) emitter (DBN-ICZ) via Förster resonance energy transfer, yielding ternary co-assemblies with narrowband green emission (FWHM = 25 nm) and strong CPL with glum of 0.43. Circularly polarized organic light-emitting diodes (CP-OLEDs) based on (F8QX)0.7-(R/S-5011)0.3-(DBN-ICZ)0.005 exhibit yellow circularly polarized electroluminescence with ∣gEL∣ value of 0.12. This work provides a comprehensive strategy integrating molecular design, hierarchical assembly, and energy transfer toward high-performance chiral optoelectronic materials.