101 results match your criteria: "Beijing Center for Crystal Research and Development[Affiliation]"

Polar-Layer-Driven Reconstruction of a Noncentrosymmetric Vandate Mid-Infrared Nonlinear-Optical Crystal.

Inorg Chem

November 2024

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Noncentrosymmetry (NCS) is essential for a second-harmonic nonlinear-optical (NLO) crystal; however, the tailored synthesis of NCS materials has historically posed significant challenges because the adjacent dipole moments of constituted NLO-active units in the structure tend to align in opposite directions, resulting in the NLO effect being canceled as in a centrosymmetric (CS) crystal. In this work, we propose a polar-layer-driven strategy, wherein a polarization-layered framework is constructed to constrain the dipole moment to align in the same direction, thereby facilitating the formation of the NCS structure. Taking the layered structure CS KZnVO as a prototype compound, a novel vandate KZnVOBr (KZVB) was rationally synthesized via a multiple sites-oriented cosubstition method.

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Rational Design of Novel Polar Nonlinear Optical Materials in Alkali Metal Rare Earth Iodates.

Inorg Chem

November 2024

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing 100190, China.

Article Synopsis
  • Researchers developed four new potassium rare earth iodates, including KLu(IO) and KLa(IO), using mild hydrothermal methods.
  • Three of these compounds (KLu(IO), KCe(IO)(HIO), and KPr(IO)(HIO)) exhibited polar structures and demonstrated measurable second-harmonic generation (SHG) responses, indicating their potential for nonlinear optical applications.
  • The study highlights how altering the radius and coordination of rare earth ions can influence crystal structure and SHG response, suggesting a new approach for designing effective polar nonlinear optical materials.
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Antithermal-Quenching All-Inorganic Perovskite Crystals with Green Ultralong Persistent Luminescence for Advanced Anticounterfeiting Applications.

Inorg Chem

October 2024

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Long persistent luminescence (PersL) materials have revolutionized many fields of optoelectronics and photonics due to their applications in anticounterfeiting, information encryption, and in vivo bioimaging. Here, we reported a novel PersL crystal prepared by the heterovalent doping of Sb into perovskite tetragonal phase RbCdCl, comparing with the pristine non-perovskite orthorhombic phase analogue without PersL property. Surprisingly, under the UV light irradiation, the title crystals concurrently exhibit green ultralong PersL (>2400 s), high photoluminescence quantum yield (49.

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Oxide matrix red-emitting phosphors are deemed as excellent color converters for white light emitting diodes (WLEDs) and laser diodes (LDs). Manganese-doped MgAlO powder was synthesized by a solid-state reaction method at different sintering temperatures. Microstructure shows that grain size is mainly in the range of 0.

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KHgGeSe: A Quaternary Hg-Based Selenide with Nonlinear Optical Properties.

Inorg Chem

September 2024

Beijing Center for Crystal Research and Development, Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.

A new quaternary Hg-based selenide KHgGeSe was successfully synthesized and characterized as an engaging infrared (IR) nonlinear optical (NLO) material, which crystallizes in the 2 space group of the noncentrosymmetric monoclinic crystal system. The crystal structure of KHgGeSe is characterized by the stacking of countless layers with K cations filling the interlayers. The UV-vis-NIR diffuse reflectance spectrum shows that KHgGeSe possesses an indirect band gap of 2.

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A Congruent-Melt Infrared Nonlinear Optical Crystal NaSrAsS.

Inorg Chem

August 2024

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

A quaternary metal thioarsenate infrared (IR) nonlinear optical (NLO) compound NaSrAsS was successfully prepared by a high-temperature reaction method from stoichiometric agents. It crystallizes in the tetragonal 42 with the unit cell parameters = 10.0393(3) Å, = 6.

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Synthesis, Structure, and Magnetic Properties of Cyanurates (CNO)(OH) ( = Gd-Lu): Cryogenic Magnetocaloric Candidate Gd(CNO)(OH).

Inorg Chem

July 2024

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

Rare-earth ()-based frustrated magnets are fertile playgrounds for discovering exotic quantum phenomena and exploring adiabatic demagnetization refrigeration applications. Here, we report the synthesis, structure, and magnetic properties of a family of rare-earth cyanurates (CNO)(OH) ( = Gd-Lu) with an acentric space group 6̅2. Magnetic susceptibility χ() and isothermal magnetization () measurements manifest that (CNO)(OH) ( = Gd, Dy-Yb) compounds exhibit no magnetic ordering down to 2 K, while Tb(CNO)(OH) shows long-range magnetic ordering around 3.

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SrHgGeOS: A Hg-Based Oxychalcogenide Infrared Nonlinear Optical Material Exhibiting Favorable Balance between a Large Band Gap and Strong Second Harmonic Generation Response.

Inorg Chem

June 2024

Beijing Center for Crystal Research and Development, Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.

Currently, oxychalcogenides with mixed-anion groups that integrate the property advantages of oxides (wide optical band gap) and chalcogenides [strong second harmonic generation (SHG) response] through chemical substitution engineering have attracted widespread interest and are considered to be important candidates for infrared (IR) nonlinear optical (NLO) materials. Herein, the first Hg-based oxychalcogenide SrHgGeOS with mixed anion [GeOS] units has been successfully synthesized through a spontaneous crystallization method, which exhibits a favorable balance between the strong SHG response (0.7 × AgGaS) and large optical band gap (2.

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Polymorphism of Niobium Phosphate Bronze NaNbPO Deduced by the Packings of Structural Units: A Centrosymmetric Phase.

Inorg Chem

May 2024

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Herein, a new centrosymmetric phase NaNbPO (referred to as CS-NaNbPO) was obtained by a molten salt method, which is a polymorph of niobium phosphate bronze NaNbPO. CS-NaNbPO displays high structural similarity to the noncentrosymmetric NaNbPO phase (referred to as NCS-NaNbPO): Distorted NbO octahedra are corner-coordinated to form ReO-type layers, which are further joined together by isolated PO tetrahedra. However, two polymorphous phases adopt different packings of structural units, resulting in distinct symmetries.

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Na(NbO)(PO): A Congruent Melting Nonlinear Optical Crystal with Large NbO Distortion and High Laser-Induced Damage Threshold.

Inorg Chem

February 2024

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

A new noncentrosymmetric crystal Na(NbO)(PO) was successfully synthesized in the niobium phosphate system. Its structure characterizes isolated and highly distorted NbO octahedra joining with isolated PO groups to form a unit of a (NbPO) hexagonal star by sharing O atoms. In (NbPO) hexagonal stars, all Nb and P atoms are in a hexagonal star-like arrangement and all Na atoms are also in a hexagonal star-like arrangement, except for Na(3) and Na(10) atoms.

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Antimony Doping Enabled Photoluminescence Quantum Yield Enhancement in 0D Inorganic Bismuth Halide Crystals.

Inorg Chem

December 2023

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Owing to the exterior self-trapped excitons (STEs) with adjustable fluorescence beams, low-dimensional ns-metal halides have recently received considerable attention in solid-state light-emitting applications. However, the photoluminescence (PL) mechanism in metal halides remains a major challenge in achieving high efficiency and controllable PL properties because the excited-state energy of ns conformational ions varies inhomogeneously with their coordination environments. Here, a novel zero-dimensional (0D) lead-free bismuth-based RbBiCl·0.

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Gd TeBO : A Rare-Earth Borate with Significant Magnetocaloric Effect.

Chemistry

January 2024

Beijing Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry Chinese Academy of Sciences, Beijing, 100190, China.

Magnetic refrigeration technology based on Gd-based paramagnets is expected to be applied to refrigeration in extremely low temperatures, thereby reducing the consumption of liquid helium. Here, we obtained a compound, Gd TeBO with high Gd concentration through element substitution. The Gd concentration in this compound is as high as 2.

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Co-substitution design: a new glaserite-type rare-earth phosphate KRbSc(PO) with high structural tolerance.

Dalton Trans

November 2023

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

An alkali rare-earth phosphate KRbSc(PO) was successfully obtained as a derivative of glaserite-type KNa(SO) by co-substitution of K(1)O → RbO, K(2)O → KO, NaO → ScO and SO → PO, while maintaining the original anionic framework. KRbSc(PO) exhibits a layered [Sc(PO)] framework built from ScO octahedra and PO tetrahedra, with K and Rb residing in the interlayers. Its isostructural lanthanide analogues KRbEr(PO) and KRbLu(PO), inspired by an elemental substitution strategy, were also prepared by a high-temperature solid state reaction.

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NaTaPO: (TaO) bi-capped triangular prisms connected by PO groups resulting in a phase-matched second harmonic response.

Dalton Trans

October 2023

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Much effort has been devoted to synthesizing nonlinear optical crystals with efficient second harmonic responses. Herein, a tantalum phosphate crystal NaTaPO with a moderate second harmonic response was obtained using self-fluxes of NaHPO and NaHPO. NaTaPO belongs to the c space group of monoclinic systems with cell parameters of = 8.

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Synthesis and characterization of a new rare earth borate nonlinear optical crystal KPbLuBO.

Dalton Trans

July 2023

Beijing Center for Crystal Research and Development, Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.

A new complex rare earth borate KPbLuBO was prepared by the spontaneous crystallization method. KPbLuBO is crystallized in the chiral trigonal space group 32 with cell parameters = = 13.0893(3) Å, = 15.

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Large Difference in Nonlinear Optical Activity of Rare Earth Ion Substitution of Bi in ATeBO (A = Bi, La, Pr, Nd, Sm-Dy).

Inorg Chem

July 2023

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

A series of oxides with high rare earth contents, RETeBO (RE = La, Pr, Nd, Sm-Dy), were synthesized, and they all crystallize in the noncentrosymmetric space group 6 resembling that of a previously reported BiTeBO ( , , 14190-14193), which showed a very strong second harmonic generation (SHG) signal believed to come from all three structural units [BO], [TeO], and [BiO]. Surprisingly, compared with the isostructural compound BiTeBO, both theoretical calculations and powder SHG tests show that RETeBO has an abnormally small SHG effect (0.2 × KDP).

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Synthesis, Crystal Structure, and Nonlinear-Optical Properties of a Diamond-Like Chalcogenide CuGeS.

Inorg Chem

July 2023

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Metal sulfides with diamond-like (DL) structures generally exhibit excellent mid-IR nonlinear-optical (NLO) properties. Here, CuGeS (CGS) as a member of the DL chalcogenides was synthesized by a high-temperature solid-state method, and the optical properties were carefully studied experimentally and theoretically. The results revealed that CGS has a large second harmonic generation (0.

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Mixed Alkali Metal and Alkaline Earth Metal Scandium Borate Birefringence Material with Layered Structure and Short Ultraviolet Cutoff Edge.

Inorg Chem

July 2023

Beijing Center for Crystal Research and Development, Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.

Birefringent crystals are essential in the domains of linear and nonlinear optics that need light wave polarization control. Rare earth borate has become a popular study material for ultraviolet (UV) birefringence crystals due to its short cutoff edge in the UV area. RbBaScBO, a two-dimensional layered structure compound with the BO group, was effectively synthesized through spontaneous crystallization.

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Atomic Substitution to Tune ScO Distortion in BaMSc(BO) (M = Na, K, Ba) to Acquire a Large Birefringence.

Inorg Chem

June 2023

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Replacing alkali metals (K, Na atoms) by an alkaline-earth metal (Ba atom), α-BaSc(BO) (high-temperature phase) is successfully obtained by a molten salt method, taking BaKNaSc(BO) as the parent template. Although both of them exhibit similar layered structures composed of ScO and BO units, α-BaSc(BO) shows largely distorted ScO octahedra (Δ = 0.56) forced by the uniform tension of a larger space effect from BaO polyhedrons, rather than regular ScO octahedra like in BaKNaSc(BO).

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Two non-centrosymmetric mixed alkali metal and alkaline earth metal scandium borate nonlinear optical materials with short ultraviolet cutoff edges.

Dalton Trans

March 2023

Beijing Center for Crystal Research and Development, Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.

Rare earth borates, a subset of the essential nonlinear optical (NLO) materials, have sparked a significant amount of attention in recent years. In self-fluxing systems, two non-centrosymmetric scandium borates with classical BO groups, namely RbSrScBO (I) and RbCaScBO (II), were successfully discovered. Both I and II exhibit a short ultraviolet (UV) cutoff edge (<200 nm) and appropriate second-harmonic generation efficiency (∼0.

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BaPbBe(BO)F: The First Pb-Containing Beryllium Borate Fluoride with Trigonal Prismatic PbO and 2D [BeBOF] Layers.

Inorg Chem

March 2023

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

BaPbBe(BO)F (BPBBF), a previously unreported lead-containing beryllium borate fluoride, has been successfully grown through a high-temperature flux method. Its structure is solved by single-crystal X-ray diffraction (SC-XRD), and it is optically characterized via infrared, Raman, UV-vis-IR transmission, and polarizing spectra as well. SC-XRD data suggests that it can be indexed by a trigonal unit cell (space group 31) with lattice parameters = 4.

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The Kurtz-Perry Powder Technique Revisited: A Study of the Effect of Reference Selection on Powder Second-Harmonic Generation Response.

Molecules

January 2023

Beijing Center for Crystal Research and Development, Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

The accurate evaluation of nonlinear optical (NLO) coefficient, the main parameter affecting light conversion efficiency, plays a crucial role in the development of NLO materials. The Kurtz-Perry powder technique can evaluate second-harmonic generation (SHG) intensity in pristine powder form, saving a significant amount of time and energy in the preliminary screening of materials. However, the Kurtz-Perry method has recently been subject to some controversy due to the limitations of the Kurtz-Perry theory and the oversimplified experimental operation.

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Structure and Characterization of KNaBPO, a New Nonlinear Optical Borophosphate with One-Dimensional Chain Structure and Short Ultraviolet Cutoff Edge.

Inorg Chem

February 2023

Beijing Center for Crystal Research and Development, Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.

Nonlinear optical (NLO) crystals, being the primary medium for laser wavelength conversion, are crucial in all-solid-state lasers. Borophosphates offer more structural varieties than pure borates and phosphates, and they have become popular as NLO crystal candidates. Through spontaneous crystallization, we acquired a noncentrosymmetric alkali metal borophosphate crystal material, KNaBPO (KNBPO).

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Growth, Structure, and Optical Properties of a Nonlinear Optical Niobium Borate Crystal CsNbOBO with Distorted NbO Square Pyramids.

Inorg Chem

December 2022

Beijing Center for Crystal Research and Development, Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.

In this paper, a revised structure determination of an already known compound CsNbOBO with new structural insights was performed and the detailed characterization of its optical properties was reported for the first time. CsNbOBO was synthesized by spontaneous crystallization. It crystallizes in the 2 space group, and the unit lattice parameters are = 7.

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Perfectly Encoding π-Conjugated Anions in the RE (C N O )(OH) (RE=Y, Yb, Lu) Family with Strong Second Harmonic Generation Response and Balanced Birefringence.

Angew Chem Int Ed Engl

January 2023

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

Nonlinear optical (NLO) crystal, which simultaneously exhibits strong second-harmonic-generation (SHG) response and desired optical anisotropy, is a core optical material accessible to the modern optoelectronics. Accompanied by strong SHG effect in a NLO crystal, a contradictory problem of overlarge birefringence is ignored, leading to low frequency doubling efficiency and poor beam quality. Herein, a series of rare earth cyanurates RE (C N O )(OH) (RE=Y, Yb, Lu) were successfully characterized by 3D electron diffraction technique.

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