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Stereoisomerism02:52

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Heterobimetallic Cluster-Based Coordination Polymers: Assembly, Structures and Third-Order Nonlinear Optical

Chen Cao1, Shu-Jin Bao1, Xiao-Yan Tang2

  • 1College of Chemistry Chemical Engineering and Materials Science, Soochow University, 199 RenAi Road, Suzhou, 215123, Jiangsu, P. R. China.

Chemistry, an Asian Journal
|July 27, 2021
PubMed
Summary
This summary is machine-generated.

Researchers synthesized novel W/Cu/S coordination polymers with varying dimensions and topologies. These materials demonstrate promising nonlinear optical properties, including reverse saturable absorption and self-focusing effects.

Keywords:
W/Cu/S clusterassemblycoordination polymercrystal structurethird-order nonlinear optical properties

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Nanotechnology

Background:

  • Tungsten-copper-sulfide (W/Cu/S) cluster-based coordination polymers are of interest for their unique structural and optical properties.
  • Developing novel coordination polymers with tailored architectures is crucial for advanced material applications.

Purpose of the Study:

  • To synthesize and characterize new two- and three-dimensional W/Cu/S cluster-based coordination polymers.
  • To investigate the structural diversity and nonlinear optical (NLO) properties of these novel materials.

Main Methods:

  • Reactions of ammonium tetrathiotungstate ((NH4)2WS4) with copper cyanide (CuCN) or copper(I) hexafluorophosphate ([Cu(MeCN)4]PF6) in the presence of 1,2-bis(4-pyridyl)propane (bppa).
  • Solvothermal synthesis conditions were employed to obtain crystalline coordination polymers.
  • Structural characterization using X-ray diffraction and analysis of nonlinear optical responses in N,N-Dimethylformamide (DMF).

Main Results:

  • Three coordination polymers were synthesized: {[Et4N]2[WS4Cu4(μ-CN)2(μ-I)2]}n (1), [WS4Cu4(μ-CN)2(bppa)2]n (2), and {[WS4Cu4(bppa)4](PF6)2}n (3).
  • Compounds 1 and 2 exhibit 2D "sql" topology networks, while compound 3 displays a rare 3D "reo" topology with two-fold interpenetration.
  • All synthesized compounds demonstrated third-order nonlinear optical responses, including reverse saturable absorption, with compound 2 showing a strong self-focusing effect.

Conclusions:

  • Novel W/Cu/S coordination polymers with diverse dimensionalities and topologies were successfully synthesized.
  • The synthesized materials exhibit significant third-order nonlinear optical properties, highlighting their potential for optical applications.
  • The structural variations directly influence the observed nonlinear optical behaviors, offering a pathway for material design.