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A Rhombic Pt(II) Metallacycle with Enhanced Third-Order Nonlinear Optical Response and Optical Power Limiting

Lai Hu1, Zhiyuan Chen1, Chenglong Wu1

  • 1School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, P. R. China.

ACS Applied Materials & Interfaces
|June 25, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel platinum-based metallacycle (MPt) using coordination-driven self-assembly for advanced third-order nonlinear optical (NLO) applications. This material shows superior optical power limiting performance, outperforming existing benchmarks.

Keywords:
Pt(II) metallacyclecoordination-driven self-assemblyexcited-state absorptionnonlinear opticsoptical power limiting

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Nonlinear Optics

Background:

  • Coordination-driven self-assembly is key for constructing supramolecular materials.
  • Third-order nonlinear optical (NLO) applications of these materials are underexplored.
  • Platinum(II) metallacycles offer potential for enhanced NLO properties.

Purpose of the Study:

  • To explore the potential of coordination-driven self-assembly in creating third-order NLO materials.
  • To investigate the NLO properties of a rhombic Pt(II) metallacycle (MPt).
  • To establish supramolecular topological engineering as a strategy for amplifying third-order NLO responses.

Main Methods:

  • Pt-N coordination-driven self-assembly to construct a rhombic Pt(II) metallacycle (MPt).
  • Characterization of third-order NLO responses, including reverse saturable absorption (RSA).
  • Fabrication of MPt@PDMS films for optical power limiting (OPL) evaluation.

Main Results:

  • The MPt metallacycle exhibited significantly enhanced third-order NLO responses attributed to its structure.
  • Enhanced spin-orbit coupling (SOC) and prolonged triplet-state lifetime (8.18 μs) were observed.
  • MPt demonstrated superior RSA at 532 nm compared to C60.
  • MPt@PDMS films showed excellent OPL performance (βeff = 1045.70 cm GW⁻¹, FOL = 0.23 J cm⁻²).

Conclusions:

  • The rhombic Pt(II) metallacycle (MPt) shows remarkable third-order NLO properties.
  • Supramolecular topological engineering effectively amplifies third-order NLO responses.
  • MPt@PDMS films represent a high-performance polymer-based material for optical power limiting.