[C(NH <sub>2</sub> ) <sub>3</sub> ]SbCl <sub>4</sub> : An NLO Material with Enhanced Second Harmonic Response and Birefringence
Guanidine units have garnered significant attention in the study of ultraviolet (UV) nonlinear optical (NLO) materials due to their excellent microscopic optical properties, making them ideal systems for developing novel optical devices. A novel guanidinium-templated UV NLO crystal, [C(NH<sub>2</sub>)<sub>3</sub>]SbCl<sub>4</sub> (<b>GSC</b>), was successfully synthesized via an aqueous solution method. <b>GSC</b> crystallizes in the orthorhombic chiral space group <i>P</i>2<sub>1</sub>2<sub>1</sub>2<sub>1</sub>, featuring a seesaw shaped [SbCl<sub>4</sub>]<sup>-</sup> anion. Remarkably, <b>GSC</b> exhibits a moderate second harmonic generation (SHG) response of 1.1 × KDP at 1064 nm and a large refractive index difference of 0.2 at 546 nm. This NLO effect originates from the synergistic interaction between the [C(NH<sub>2</sub>)<sub>3</sub>]<sup>+</sup> unit and the stereochemically active [SbCl<sub>4</sub>]<sup>-</sup> unit. This work provides a candidate for the guanidine family of NLO materials.
Authors
- Yaqi Jin
- Xueling Hou
- Bingxu Chen (ORCID: https://orcid.org/0009-0005-9945-9747)
- Feng Yu (ORCID: https://orcid.org/0009-0004-1620-7361)
- Hangwei Jia
- Junwei Feng
Institutions
- Shihezi University (CN)
- Xinjiang Technical Institute of Physics & Chemistry (CN)
- Green Chemistry (PL)
Publication Details
- Journal
- Inorganic Chemistry
- Published
- 2026-01-23
- DOI
- https://doi.org/10.1021/acs.inorgchem.5c05688
- Primary Topic
- Crystal Structures and Properties
- Type
- article
- Field-Weighted Citation Impact
- 0.00