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Updated: Jun 9, 2026
10:42
Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
Published on: December 29, 2016
Breaking Layered Limitations via Electrostatic-to-Covalent Conversion toward Three-Dimensional T2-Cluster-Based
Shao-Min Pei1,2, Jun-Long Chen1,3, Xiao-Ming Jiang1,2
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
Journal of the American Chemical Society
|June 8, 2026
Summary
Researchers developed new 3D nonlinear optical (NLO) chalcogenides by replacing barium with magnesium, overcoming 2D crystal limitations. These novel materials exhibit enhanced structural connectivity and promising NLO properties for advanced applications.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Nonlinear Optics
Background:
- Two-dimensional (2D) layered nonlinear optical (NLO) crystals face limitations in structural connectivity and anisotropic growth.
- Previous attempts to modify RbGaS2 resulted in retained 2D architectures due to electrostatic interlayer forces.
Purpose of the Study:
- To overcome the limitations of 2D layered NLO crystals.
- To synthesize novel 3D chalcogenides with improved structural properties and NLO functionality.
Main Methods:
- Compositional replacement of barium with magnesium in a polycation-substitution strategy.
- Adjustments to synthesis conditions.
- Theoretical calculations to analyze interlayer bonding.
Main Results:
- Successful synthesis of two new 3D salt-inclusion chalcogenides: A[A4Mg3Cl3][Ga12S22] (A = Rb, Cs).
- Reorganization of the 2D layered architecture into a 3D interconnected framework.
- Conversion of electrostatic interlayer interactions to more covalent Mg-S/Mg-Cl bonds.
- Compounds exhibit wide band gaps (3.47-3.54 eV) and high laser-induced damage thresholds.
- Competitive second-harmonic generation (SHG) responses (1.2-1.7 × AgGaS2).
Conclusions:
- The developed 3D chalcogenides overcome the inherent limitations of 2D layered structures.
- The findings offer a new structural design strategy for 3D T2-cluster-based chalcogenides with enhanced NLO properties.
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