Hg2(SeO3)(TeO3): A novel tellurite-selenite birefringent crystal achieved by assembling multiple functional groups

Journal of Materials Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Hg 2 (SeO 3 )(TeO ), a new tellurite–selenite birefringent crystal, showcases broad transparency range, large birefringence, and high thermal stability, positioning it as promising material.

Language: Английский

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Prismatic crystal field stabilized divalent rare-earth chalcogenide RE^IIB^II₆C^III₆Q^VI₁₆ with bifunctionality

The Innovation Materials, Journal Year: 2025, Volume and Issue: unknown, P. 100118 - 100118

Published: Jan. 1, 2025

<p>Divalent rare-earth (RE²⁺) compounds with unique electronic configurations have been known for more than 100 years, and many efforts done, but the synthesis of inorganic RE²⁺ chalcogenides is still a challenge due to chemical instability RE²⁺. Herein, nine new RE^IIB^II₆C^III₆Q^VI₁₆ (RE^II = La, Ce, Pr, Yb; B^II Mg, Mn; C^III Al, Ga; Q^VI S, Se) rationally designed in an octahedra tetrahedra composed flexible framework, fabricated experiment. In compounds, stabilized by prismatic crystal field, rather common octahedral field. The especially sulfides, exhibit significant luminescence properties wide visible light emission bands under excitation ultraviolet source. Meanwhile, representative LaMg₆Ga₆Se₁₆ exhibits strong nonlinear optical (NLO) response 1.5 × AgGaS₂ (AGS), high laser-induced damage threshold (LIDT) 3 AGS. results demonstrate that are bifunctional enriching diversity RE materials, opening avenue design functional materials based on stable anionic frameworks.</p>

Language: Английский

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Hydrogen bonding regulation-oriented design of pyridine sulfonate as a promising UV birefringent crystal characterized by enhanced structural anisotropy

Chemical Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Birefringent materials, capable of manipulating light polarization, are pivotal in advanced optical technologies. Traditionally, the development such materials has predominantly focused on purely inorganic compounds, which often exhibit limited birefringence. Herein, we present a new 3-pyridinesulfonate birefringent crystal, Ca(3-C5H4NSO3)2·4H2O, synthesized via hydrogen-bonded regulation strategy designed to enhance coplanarity [3-pySO3] groups. As expected, Ca(3-C5H4NSO3)2·4H2O demonstrates notably large birefringence 0.286@532 nm, exceeding that most commercially available crystals. Furthermore, this compound outstanding environmental stability and short ultraviolet (UV) absorption cutoff edge at 257 accompanied by wide band gap 4.4 eV. A combination structural analysis theoretical calculations unraveled crucial role hydrogen bonds optimizing arrangement rings. This effectively induces high degree facilitates formation quasi-2D layered structure, thereby contributing exceptional anisotropy Ca(3-C5H4NSO3)2·4H2O. These findings highlight as promising UV crystal underscore efficacy bond engineering for designing with enhanced properties.

Language: Английский

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ISOLATION, CHARACTERIZATION AND EVALUATION OF ANTIOXIDANT ACTIVITY OF SILICA CELLULOSE NANOCOMPOSITE (SiO2-CNC) EXTRACTED FROM BIO-WASTE (RICE HUSK) INTEGRATED WITH CALLISTEMON CITRINUS EXTRACT

FUDMA Journal of Sciences, Journal Year: 2025, Volume and Issue: 9(2), P. 220 - 230

Published: Feb. 28, 2025

Recent research has focused on more complex uses, such as the extraction of silica cellulose nanocomposite from rice husks, which potential a way to create high-tech materials. The work describes successful isolation, characterization, and assessment husk-derived (SiO2-CNC) with Callistemon citrinus extract integration. synthesis process consisted three principal operations: delignification alkaline treatment, sodium hypochlorite bleaching, concentrated sulphuric acid hydrolysis. prepared was analyzed by EDX, SEM, TEM, FTIR, spectrophotometry, thermal analysis (DTA/TGA). EDX studies showed composite material elemental (40.20%), carbon (20.76%), silver (10.57%), zinc (8.50%) in significant proportions. sophisticated structure uniform porous networks demonstrated SEM analysis, while presence nanoparticles sized 2.70 6.37 nm confirmed TEM. Thermal distinct decomposition steps beyond 250oC, stability observed up these temperatures. FTIR spectroscopy verified functional groups SiO2-CNC husk extract, UV strong absorption 200-230 range. ability enhance antioxidant properties SiO2-CNC, observable DPPH ABTS assays. integrated radical scavenging activities. These findings demonstrate conversion agricultural waste into value-added enhanced properties, offering application delivery systems, advanced materials development. This contributes sustainable nanomaterial development addressing management challenges.

Language: Английский

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Rb₇PbY₂(B₅O₁₀)₃: A Noncentrosymmetric Rare-Earth Borate Nonlinear Optical Crystal with [B₅O₁₀] Unit

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 14, 2025

For ultraviolet (UV) nonlinear optical (NLO) crystals, three fundamental parameters are essential: the absorption edge, NLO coefficient, and shortest wavelength for second harmonic generation (SHG) phase matching (PM). In this study, a rare-earth borate, Rb7PbY2(B5O10)3, was synthesized via chemical cosubstitution using high-temperature melt method. Rb7PbY2(B5O10)3 has been found to crystallize with noncentrosymmetric (NCS) space group an SHG intensity of 1.3 times KDP UV cutoff edge less than 300 nm. These properties indicate that exhibits significant potential as material.

Language: Английский

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Synergically Assembling Advantageous Groups toward High‐Performance Infrared Nonlinear Optical Materials A^IICdSiSe₄ (A^II = Sr, Ba)

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

Abstract Developing superior infrared nonlinear optical (IR NLO) materials with broad bandgap ( E g ) and large NLO response is an urgent need for the highly expected mid‐/far‐IR solid‐state lasers, but challenging due to contradiction between critical parameters. Herein, guided by short board effect of longboard response, four new IR candidates A II B SiSe 4 (A = Sr, Ba; Cd, Hg) derived from centrosymmetric (CS) SrIn 2 Se , a structural transition Ama HgSiSe SrCdSiSe Fdd (BaCdSiSe ), are rationally designed fabricated synergically assembling advantageous groups. Among them, CdSiSe displays optimal comprehensive performance in known C IV family compounds, including strong (≈2.1–2.7 × AgGaS wide selenide (≈2.67–2.78 eV) high laser‐induced damage threshold (≈4.0 ). Theoretical investigations uncover that properties compounds can be contributed synergic‐assembly [A 8 ], [CdSe [SiSe ] units. The results enrich chemical diversities chalcogenides, open avenue design high‐performance CS compound aliovalent group substitution strategy.

Language: 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, Journal Year: 2025, Volume and Issue: unknown

Published: April 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.

Language: Английский

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Unearthing Hydrogen Bonded Metal‐Free Crystal with Remarkable Optical Anisotropy

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

Abstract Birefringent crystals are crucial in modulating the polarization state of light within contemporary technological applications. Organic molecules with π‐conjugated structure known to exhibit significant birefringence effect owing their unique electronic properties. This study demonstrates that 4, 5‐dichocyanimidazole can be used as a new crystal building block for birefringent crystals. Crystals C 5 N 4 H 2 ( DCI ) and ·H O DCI‐w obtained by evaporation at room temperature. It is worth noting birefringence. At 546 nm, experimental 0.417 calculated reaches 0.618. The significantly larger than those all commercial exceeds most metal‐free First‐principles calculations structural analysis show this remarkable mainly due strong anisotropy planar well‐organized arrangement groups. discovery opens up possibilities development high‐performance optical materials.

Language: Английский

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Breaking the Natural Tendency of Deep‐UV Polyborate Anion Clusters to Inducing Strong Optical Anisotropy

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract Polyborate anion is a tunable and versatile framework that offers long‐term structural stability, providing the active sites to tolerate various coordination ions induce functionalities. However, their random arrangement typiaclly weakens optical anisotropy despite high bandgaps. Converting these flexible frameworks into optical‐active states remains challenging. Herein, full model proposed where all groups are optimally arranged fully contribute total in lattice. A new polyborate reported with quality factor ( F = 0.984), based on terminal stretch strategy using nucleophilic groups. This renders its almost entirely optically thus leads strong deep‐ultraviolet (deep‐UV) of Δ n exp 0.148 borate system. Theoretical evidence supports role orbital hybridization inducing preferred configuration module. These findings not only validate viability break intrinsic defect small polyanionic materials, but also expand alternative system promising deep‐UV crystals polyanion has been neglected for long time.

Language: Английский

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