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[C(NH2)3]SbCl4: An NLO Material with Enhanced Second Harmonic Response and Birefringence
Hangwei Jia1, Yaqi Jin1,2, Junwei Feng2
1Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
Inorganic Chemistry
|January 23, 2026
Summary
Researchers developed a new ultraviolet nonlinear optical crystal, [C(NH2)3]SbCl4 (GSC), using guanidine. This material shows promising nonlinear optical properties for advanced optical devices.
Area of Science:
- Materials Science
- Crystallography
- Optics
Background:
- Guanidine units are crucial for developing ultraviolet (UV) nonlinear optical (NLO) materials.
- These materials are essential for creating advanced optical devices due to their unique microscopic optical properties.
Purpose of the Study:
- To synthesize and characterize a novel guanidinium-templated UV NLO crystal.
- To investigate the NLO properties and structural characteristics of the new material.
Main Methods:
- Aqueous solution method for synthesis.
- X-ray crystallography for structural analysis.
- Optical property measurements (SHG and refractive index).
Main Results:
- Successfully synthesized [C(NH2)3]SbCl4 (GSC), a novel guanidinium-templated UV NLO crystal.
- GSC crystallizes in the chiral space group P212121 with a seesaw-shaped [SbCl4]- anion.
- Observed a moderate second harmonic generation (SHG) response (1.1 × KDP) and a large refractive index difference (0.2).
Conclusions:
- The NLO effect in GSC arises from the synergistic interaction between guanidinium and [SbCl4]- units.
- GSC is a promising candidate for the guanidine family of NLO materials.
- This study contributes to the development of novel UV NLO materials.
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