Volume 20, Issue 26 2310423
Research Article

Polysulfide Anions [Sx]2− (x = 2, 3, 4, 5): Promising Functional Building Units for Infrared Nonlinear Optical Materials

Miao Song

Miao Song

College of Chemistry and Materials Science, Institute of Life Science and Green Development, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei University, Baoding, 071002 China

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Yan Xiao

Yan Xiao

College of Chemistry and Materials Science, Institute of Life Science and Green Development, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei University, Baoding, 071002 China

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Daqing Yang

Daqing Yang

College of Chemistry and Materials Science, Institute of Life Science and Green Development, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei University, Baoding, 071002 China

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Ying Wang

Ying Wang

College of Chemistry and Materials Science, Institute of Life Science and Green Development, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei University, Baoding, 071002 China

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Bingbing Zhang

Corresponding Author

Bingbing Zhang

College of Chemistry and Materials Science, Institute of Life Science and Green Development, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Chemical Biology Key Laboratory of Hebei Province, State Key Laboratory of New Pharmaceutical Preparations and Excipients, Hebei University, Baoding, 071002 China

E-mail: [email protected]

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First published: 23 January 2024
Citations: 8

Abstract

Infrared nonlinear optical (IR NLO) materials play significant roles in laser technology. The novel functional building units (FBUs) are of great importance in constructing NLO materials with strong second harmonic generation (SHG). Herein, polysulfide anion [Sx]2− (x = 2, 3, 4, 5) units are investigated on NLO-related properties and structure-performance relationships. Theoretical calculations uncover that the [Sx]2− (x = 2, 3, 4, 5) units are potential IR NLO FBUs with large polarizability anisotropy (δ), hyperpolarizability (β) and wide HOMO–LUMO gap. Fourteen crystals including [Sx]2− (x = 2, 3, 4, 5) units are calculated and analyzed. The results show that these units can result in a wide IR transmittance range, significant SHG effects, wide band gap Eg (Na2S4: Eg = 3.09 eV), and large birefringence Δn [BaS3 (P21212): Δn = 0.70]. More importantly, it is highlighted that the crystal materials including with [Sx]2− (x = 2, 3, 4, 5) groups are good candidates for the exploration of the outstanding IR NLO materials.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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