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<p>A supramolecular cocrystal of [(3-acetyl-1-methylpyridinium)<sub>2</sub>(18-crown-6)] diiodide (3AP18C6) was synthesized via slow evaporation and characterized for its structural, dielectric, and third-order nonlinear optical (NLO) properties. FT-IR spectroscopy confirmed the functional groups, while UV–Vis and photoluminescence studies revealed a 2.87&#xa0;eV band gap and green emission at 528&#xa0;nm. SEM/EDS analysis verified elemental composition and morphology. Dielectric studies indicated frequency- and temperature-dependent relaxation behavior, with a notable phase transition near 100&#xa0;°C. AC conductivity followed the power law model, highlighting thermally activated hopping transport. Z-scan analysis demonstrated negative nonlinearity and reverse saturable absorption, confirming third-order NLO activity. These findings establish 3AP18C6 as a promising multifunctional material for optoelectronic and photonic applications.</p>

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Structural insights, dielectric behavior, and third-order nonlinear optical properties of a supramolecular cocrystal of [(3-acetyl-1-methylpyridinium)2 (18-crown-6)] diiodide

  • 期刊论文

  • 发表日期：

    2025年9月20日

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  • Samandarov Elyorbek Shonazar ugli,
  • Ibragimov Aziz Bakhtiyarovich,
  • Loganathan Guganathan,
  • Ayyar Manikandan,
  • Ikram Iskandarovich Abdullaev,
  • Yakubov Yuldosh Yusupboevich,
  • Chellakarungu Balakrishnan

摘要

A supramolecular cocrystal of [(3-acetyl-1-methylpyridinium)2(18-crown-6)] diiodide (3AP18C6) was synthesized via slow evaporation and characterized for its structural, dielectric, and third-order nonlinear optical (NLO) properties. FT-IR spectroscopy confirmed the functional groups, while UV–Vis and photoluminescence studies revealed a 2.87 eV band gap and green emission at 528 nm. SEM/EDS analysis verified elemental composition and morphology. Dielectric studies indicated frequency- and temperature-dependent relaxation behavior, with a notable phase transition near 100 °C. AC conductivity followed the power law model, highlighting thermally activated hopping transport. Z-scan analysis demonstrated negative nonlinearity and reverse saturable absorption, confirming third-order NLO activity. These findings establish 3AP18C6 as a promising multifunctional material for optoelectronic and photonic applications.