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Published on: March 28, 2016
Nonlinear Optical Responses in One-Dimensional Zinc Thiocyanates Functionalized with Natural Amino Acids.
Xuemei Wen1, Qinglan Zhong1, Guohong Zou1
1College of Chemistry, Sichuan University, Chengdu 610064, China.
New metal thiocyanate crystals were synthesized using natural amino acids. These chiral crystals exhibit strong nonlinear optical properties, with one compound showing superior performance compared to existing materials.
Area of Science:
- Materials Science
- Crystallography
- Nonlinear Optics
Background:
- Metal thiocyanates are explored for nonlinear optical (NLO) applications.
- Chiral materials offer unique optical properties.
- Natural amino acids can serve as versatile linkers in crystal engineering.
Purpose of the Study:
- To synthesize novel transparent crystals incorporating natural amino acids.
- To investigate the structural and nonlinear optical properties of the synthesized compounds.
- To compare the NLO performance with existing materials.
Main Methods:
- Single crystal X-ray diffraction for structural determination.
- Nonlinear optical measurements, including second-harmonic generation (SHG).
- Phase matching evaluation under laser irradiation.
Main Results:
- Two novel compounds, Zn(SCN)2(l-C6H9N3O2) (1) and Zn(SCN)(l-C5H8NO2)(H2O) (2), were successfully synthesized.
- Both compounds exhibit one-dimensional structures with combined molecular and helical chiralities.
- Significant, phase-matchable NLO responses were observed, with compound 2 showing a high SHG efficiency (3.8 × KH2PO4).
Conclusions:
- Natural amino acids can be effectively used as linkers to create chiral metal thiocyanate crystals.
- The synthesized compounds demonstrate promising nonlinear optical properties.
- Compound 2 represents a significant advancement in NLO materials derived from metal thiocyanates and amino acids.
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