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<p>Cyano-substituted oligo(p-phenylene vinylenes) (CN-OPV) is a unique class of aggregation-induced emission (AIE) materials that overcome aggregation-caused quenching (ACQ) and display strong solid-state fluorescence. Incorporation of cyano groups enhances electron-withdrawing ability, charge transfer, and molecular twisting, enabling efficient emission in thin films and crystalline states. In this work, we designed and synthesized a new CN-OPV derivative and confirmed its structure through NMR, FTIR, and HRMS. The AIE properties were systematically examined in DMSO/H₂O, THF/H₂O, and ACN/H₂O solvent mixtures, and the results consistently revealed remarkable fluorescence enhancement upon aggregation as validated by spectroscopic and microscopic observation. The strong fluorescence, robust self-assembly, and tunable emission highlight the practical utility of CN-OPV as a promising material for advanced applications in sensors, bioimaging, flexible optoelectronics, and data storage. The computational DFT studies supports twisted intramolecular charge transfer (TICT) characteristics of OPV-6&#xa0;M. Time-resolved fluorescence confirmed enhanced lifetimes in water-rich mixtures, highlighting the synergistic role of AIE and TICT in tuning photophysical properties.</p>

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Supramolecular Self-Assembly and Synergistic AIE–TICT Emission in a Cyano-Substituted OPV Chromophore

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Viral Khatri,
  • Alisha Sengupta,
  • Vaishali Chaudhari,
  • Kartik Kumar Jayswal,
  • Anvesha Bhanot,
  • Chirag N. Patel,
  • Raj Dave,
  • Ankita Jaiswal,
  • Rajesh Bhosale,
  • Krunal Modi,
  • Nidhi Gour

摘要

Cyano-substituted oligo(p-phenylene vinylenes) (CN-OPV) is a unique class of aggregation-induced emission (AIE) materials that overcome aggregation-caused quenching (ACQ) and display strong solid-state fluorescence. Incorporation of cyano groups enhances electron-withdrawing ability, charge transfer, and molecular twisting, enabling efficient emission in thin films and crystalline states. In this work, we designed and synthesized a new CN-OPV derivative and confirmed its structure through NMR, FTIR, and HRMS. The AIE properties were systematically examined in DMSO/H₂O, THF/H₂O, and ACN/H₂O solvent mixtures, and the results consistently revealed remarkable fluorescence enhancement upon aggregation as validated by spectroscopic and microscopic observation. The strong fluorescence, robust self-assembly, and tunable emission highlight the practical utility of CN-OPV as a promising material for advanced applications in sensors, bioimaging, flexible optoelectronics, and data storage. The computational DFT studies supports twisted intramolecular charge transfer (TICT) characteristics of OPV-6 M. Time-resolved fluorescence confirmed enhanced lifetimes in water-rich mixtures, highlighting the synergistic role of AIE and TICT in tuning photophysical properties.