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Updated: May 31, 2026
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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Four [Tp*W(μ3-S)3Cu3(μ3-Br)]-based clusters: synthesis, structural characterization and third-order NLO properties
Xue Lü1, Xi Chen, Zhi-Gang Ren
1Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, PR China.
Dalton Transactions (Cambridge, England : 2003)
|July 7, 2011
Summary
This study synthesizes novel tungsten-copper-sulfur clusters with unique structures and good nonlinear optical (NLO) properties. Compounds 3 and 4 demonstrate the highest NLO responses among similar W/Cu/S clusters.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Nanotechnology
Background:
- Tungsten-copper-sulfur clusters are of interest for their unique structural motifs and potential applications.
- The hydridotris(3,5-dimethylpyrazol-1-yl)borate (Tp*) ligand provides stability and tunability to metal clusters.
- Exploring new synthetic routes to functionalized clusters is crucial for discovering novel properties.
Purpose of the Study:
- To synthesize and characterize new tungsten-copper-sulfur clusters with varying organic ligands.
- To investigate the structural diversity of these clusters, including cationic, polymeric, and neutral forms.
- To evaluate the nonlinear optical (NLO) properties of the synthesized compounds.
Main Methods:
- Reaction of a precursor cluster [Et(4)N][Tp*W(μ(3)-S)(3)(CuBr)(3)] with α-methylpyridine, 1,4-pyrazine, and melamine.
- Characterization using elemental analysis, IR, UV-vis, 1H NMR, ESI mass spectrometry, and X-ray crystallography.
- Investigation of third-order nonlinear optical properties using femtosecond degenerate four-wave mixing (DFWM).
Main Results:
- Synthesis of four new W/Cu/S clusters (2-5) with diverse structures: cationic cubane-like, 1D zigzag polymeric, 1D spiral polymeric, and neutral cubane-like.
- Structural elucidation confirmed the coordination of α-methylpyridine, 1,4-pyrazine, and melamine ligands.
- All synthesized compounds (1-5) exhibited significant third-order NLO responses.
- Compounds 3 and 4 showed the largest second-order hyperpolarizability (γ) values among known [Tp*WS(3)]-containing W/Cu/S clusters.
Conclusions:
- Novel W/Cu/S clusters with tunable structures and promising NLO properties were successfully synthesized.
- The choice of organic ligand significantly influences the resulting cluster architecture and NLO behavior.
- These findings contribute to the development of advanced materials for optical applications.
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