A Noncentrosymmetric Metal‐Free Borophosphate: Achieving a Large Birefringence and Excellent Stability by Covalent‐Linkage

Small, Год журнала: 2024, Номер 20(34)

Опубликована: Апрель 15, 2024

Abstract Organic–inorganic hybrid linear and nonlinear optical (NLO) materials have received increasingly wide spread attention in recent years. Herein, the first noncentrosymmetric (NCS) borophosphate, (C 5 H 6 N) 2 B O(HPO 4 ) (4PBP), is rationally designed synthesized by a covalent‐linkage strategy. 4‐pyridyl‐boronic acid (4 PB) considered as bifunctional unit, which may effectively improve properties stability of resultant material. On one hand, PB units are covalently linked with PO 3 (OH) groups via strong B–O–P connections, significantly enhances thermal 4PBP (decomposition at 321, vs lower 200 °C most materials). other planar π ‐conjugated C N their uniform layered arrangements represent large structural anisotropy hyperpolarizability, achieving largest birefringence (0.156 @ 546 nm) reported borophosphates second‐harmonic generation response (0.7 × KDP). also exhibits transparency range (0.27–1.50 µm). This work not only provides promising birefringent material, but offers practical covalent‐attachment strategy for rational design new high‐performance materials.

Язык: Английский

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SnHPO₄: A Layered Tin(II) Phosphate with Enhanced Birefringence

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 23, 2025

As promising optoelectronic functional materials in the short-wavelength spectral region, such as ultraviolet (UV) and deep UV, phosphates have recently received increased attention. However, phosphate commonly suffer from limited birefringence owing to highly symmetrical PO4 tetrahedra. We herein report a layered tin(II) with improved birefringence. By employing polarizing microscope, measured refractive index difference determined on (010) wafer is 0.042@550 nm, which very close calculated of 0.039@550 nm between nx nz through density theory (DFT) method. The largest appears (100) plane, theoretically be 0.078@550 nm. Single crystals SnHPO4 measuring 20 × 4 3 mm3 can easily grown by hydrothermal In addition, UV transparent short absorption cutoff edge 242 an optical band gap 4.50 eV, implying that it could potential birefringent material.

Язык: Английский

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BaFS: Birefringence Enhanced by the Transformation from Optical Isotropy to Anisotropy via Interlayer Anion Substitution

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 14, 2025

Improved birefringence, given its capacity to modulate polarized light, holds a lively role in the optoelectronic industry. Traditionally, alkaline-earth metal halides have possessed low birefringence due their nearly optical isotropic properties. Herein, substitution of interlayer anion with linear S─S unit that meticulously engineered by reduced valence state and strong covalent bond is integrated into optically BaF2, offering new salt-inclusion chalcogenide BaFS. Notably, it has dramatically enhanced anisotropy, thereby significantly boosting 0.238@546 nm, achieved overall considering experimental observations theoretical analysis. Theoretical investigation established significant effect on index. Additionally, BaFS demonstrates remarkable laser-induced damage threshold (LIDT, 12.0 × AgGaS2@1064 nm), illuminating promising pathway for designing materials properties laser applications.

Язык: Английский

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Na[B₃IO₇(OH)] and Na₂[B₄IO₉](IO₃): Explorations of Boroiodates with Strong Second Harmonic Generation Response and Large Birefringence

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Апрель 7, 2025

In the exploration of nonlinear optical (NLO) materials, developing new functional groups for high performance is essential. Achieving a balance among band gap, second harmonic generation (SHG), and birefringence within compound quite challenging. By directly connecting iodates borates by B-O-I bridges, two boroiodates with novel [B3IO8(OH)]3- [B4IO11]5- anionic groups, namely, Na[B3IO7(OH)] (NBIO-I) Na2[B4IO9](IO3) (NBIO-II), were successfully synthesized first time through boric acid melting method under different molar ratios H3BO3/NaIO3. NBIO-I (Pbca) features unique 1D ∞1[B3IO7(OH)]- chain composed corner-sharing [B3O6(OH)]4- [IO3]- hanging on both sides chain. contrast, NBIO-II (Cc) displays 2D layer ∞2[B4IO9]-, in which all are same side ∞2[B4O7]2- formed [B3O7]5- [BO3]3- groups. Remarkably, exhibits wide gap (4.3 eV), large (0.298@546 nm), strongest SHG response (7.8 × KDP) borate-iodates reported previously. This work not only discovered as promising NLO crystals but also provided an effective synthetic route excellent properties.

Язык: Английский

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Cation tuning in anionic framework hydroborates: tailored deep-ultraviolet optical crystals with large birefringence

New Journal of Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

3D network structure of LiB5O7(OH)2 (I), (NH4)2B10O14(OH)4·H2O (II), (NH4)0.5K1.5B10O14(OH)4·H2O (III) and (NH4)0.7Cs1.3B10O14(OH)4·H2O (IV).

Язык: Английский

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The synthesis, structures and characterizations of (C5H12NO)4Cd3Cl10∙2H2O and (C5H12NO)2BiCl6∙H5O2 crystals

Journal of Molecular Structure, Год журнала: 2024, Номер 1322, С. 140501 - 140501

Опубликована: Окт. 25, 2024

Язык: Английский

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Investigations of structure, thermal stability and optical properties of a new NLO crystal (C3H5N2)+(CF3COO)-

Journal of Molecular Structure, Год журнала: 2024, Номер 1320, С. 139764 - 139764

Опубликована: Авг. 23, 2024

Язык: Английский

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