A new stable Zr-based MOP is successfully constructed. Unique cavity and 2D hydrogen-bonding networks endow the with highly selective CO₂ capture excellent proton conduction.

Herein, we offer a simple but crucial case for rational design and syntheses of infrared nonlinear optical (NLO) materials by employing state-of-the-art AgGaS2 as parent model. On the basis inheriting structural advantages AgGaS2, an as-grown CuZnPS4 crystal exhibits sharply enlarged energy gap (3.0 eV) benefiting from cosubstitution Ag with lighter Cu/Zn. Remarkably, valence electron distribution is optimized bringing in cation vacancy defects, which significantly reinforce second harmonic...

Trigonal-planar units with high physicochemical stability and large polarizability anisotropy are one kind of promising fundamental building block (FBB) for constructing novel nonlinear optical (NLO) materials. Though great achievements have been made in the ultraviolet/deep ultraviolet (UV/DUV) region trigonal-planar units, little attention has paid to them infrared owing lack enough representatives. In this work, [AgSe3] [HgSe3] rationally proposed as NLO-active FBBs. addition, Ag6HgMSe6...

Four Hg-based IR nonlinear-optical materials, AHgSnQ4 (A = Sr, Ba; Q S, Se), were discovered and investigated systematically. Their structures are built of two-dimensional [HgSnQ4]2- layers, which assembled alternately by distorted (HgQ4 SnQ4) tetrahedra separated eight-coordinated A2+ cations. The two sulfides AHgSnS4 Ba, Sr) exhibit large second-harmonic-generation (SHG) responses (2.8 1.9 × AgGaS2 at 2.09 μm), as well band gaps (2.77 2.72 eV). selenides AHgSnSe4 show even stronger SHG...

Great enhancement of the second harmonic generation response is achieved in AgHgPS₄by introducing vacancy defects and highly distorted HgS₄tetrahedra using AgGaS₂as template.

Abstract A series of nonlinear optical (NLO) chalcohalides AXHg 3 P 2 S 8 (A = Rb, Cs; X Cl, Br), which contain various Hg‐based building units including mixed‐anion trigonal planar [HgS X] 3− and tetrahedral 5− , are successfully synthesized. These compounds display good water resistance, wide infrared transparent region (0.42–17 µ m), high laser‐induced damage thresholds (4.5–6 × AgGaS ), strong phase‐matchable second harmonic generation (SHG) response close to . The chalcohalide groups...

Two RE-based quaternary metal chalcogenides EuCdGeQ₄(Q = S, Se) are discovered. They possess many attractive properties as preferred IR NLO materials including large band gaps, phase-matched intense SHG and congruent melting behavior.

Highly polarizable mixed-anion structural building units (SBUs) have been demonstrated as promising candidates for high-performing optical crystals. In this work, two new SBUs of [GeOSe3] and [GeO3S] are first designed through partial isovalent substitution chalcogen atoms by O in the classical [GeQ4] (Q = S, Se) tetrahedra. On basis these SBUs, quaternary oxychalcogenides, Sr3Ge2O4Se3 SrGe2O3S2, successfully synthesized. crystallizes noncentrosymmetric space group R3m possesses unique...

Chalcogenides with diamond-like (DL) structures are a treasury of infrared nonlinear optical (NLO) materials. Here, ternary Hg-based chalcogenide defect DL structure, Hg3P2S8, is synthesized by solid-state reaction. Driven the highly distorted [HgS4] tetrahedra, this compound displays an interesting structural symmetry degradation from tetragonal to orthorhombic compared its analogue Zn3P2S8. Meanwhile, overall performances Hg3P2S8 quite remarkable, including very strong phase-matchable...

Chalcogenides are promising candidates for exploring mid- and far-infrared nonlinear optical (NLO) materials. Nevertheless, although tellurides possess greater advantages in the above-mentioned spectral regions, reports on telluride NLO materials far fewer than those sulfides selenides. In this work, a new quaternary NLO-active telluride, KCd4Ga5Te12, was discovered, its Rb Cs analogues were successfully synthesized. They crystallized trigonal R3 space group structure features 3D...

Metal chalcogenides play a critical role in the infrared (IR) nonlinear optical (NLO) field. However, Eu-based chalcogenide-type IR NLO materials are still scarce up to now. In this paper, two new quaternary chalcogenides, EuHgGeSe4 and EuHgSnS4, containing "NLO active groups" [HgQ4]6– (Q = S, Se) [GeSe4]4–/[SnS4]4– were synthesized through traditional high-temperature solid-state reactions. They possess noncentrosymmetric structures, crystallizing Ama2 space group, exhibit strong...

New infrared nonlinear optical material CuCd₃PS₆is activated by its three-in-one tetrahedra-stacking architecture.

The continuous exploration of multinary chalcogenide semiconductors has provided a variety new functional materials. In this paper, four quaternary chalcogenides AHgPS4 (A+ = Na+, K+, Rb+, Cs+) have been prepared by solid-state syntheses. These findings complement the lack research on system. Influenced size effect cations and coordination mode Hg, compounds crystallize in different space groups [NaHgPS4, P4̅n2; KHgPS4, Pnn2; RbHgPS4, P21/n; CsHgPS4, P212121] show an interesting evolution...

Photocatalytic oxygen reduction reaction (ORR) through a two-electron pathway is green, sustainable route for hydrogen peroxide (H2O2) production. An outstanding visible-light-driven photocatalyst ZnIn2S4 (ZIS) with anchoring nickel metal dots (Ni0) less than one nanometer, namely, Ni/ZIS, has been successfully synthesized H2O2 production followed by effective degradation of sulfamethoxazole (SMX). As compared the pristine, Ni/ZIS capacity exhibit 5 times yield >40.9 μmol/L in presence...

A new infrared nonlinear optical material with diamond-like structures, Li4HgSn2Se7, was synthesized by the traditional high-temperature solid-state method. It crystallizes in non-centrosymmetric group Cc all LiSe4, HgSe4, and SnSe4 tetrahedra aligned an additive manner. This exhibits large second harmonic generation (SHG) about 3.6 times that of benchmark AgGaS2 phase-matching behavior. Detailed structural analysis calculations reveal (HgSe4) (SnSe4) are main contributors for its strong...

A novel noncentrosymmetric chalcogenide (Na 3 Rb)Hg 2 Ge S 8 with mixed alkali metals was successfully synthesized and showed a strong second harmonic generation response of 1.4 × AgGaS at 2090 nm for infrared nonlinear optics.

In this research, a new ternary arsenide, Cd5As2Br4, with nonlinear optical (NLO) property has been synthesized. Cd5As2Br4 possesses noncentrosymmetric structure space group belonging to the orthorhombic crystal system, specifically Pna21. The of is formed by interconnection three one-dimensional structures, resulting in three-dimensional structure. diffuse reflectance spectrum reveals that direct band gap 1.91 eV. NLO performance tests indicate at particle size range 20–50 μm, second...

Oxychalcogenides can combine the large second-harmonic generation (SHG) effects of chalcogenides with wide bandgaps oxides to obtain high-performance infrared (IR) nonlinear optical (NLO) crystal materials. Here, first quaternary oxythiostannate NLO material Sr6Sn3OS11 crystallized in trigonal noncentrosymmetric space group P3m1 is synthesized by a high-temperature solid-state method. Its 0D structure features isolated [SnS4] and [SnOS3] tetrahedra, which be derived from parent Sr2SnS4...

A method for determining eight biogenic amines in surface water was established using high-performance liquid chromatography-triple quadrupole mass spectrometry to improve on the detection sensitivity of current methods.The limits and quantification were 0.05 0.2 μg L -1 , respectively, histamine, cadaverine, spermine, spermidine, 1.0 3.0 putrescine, 1.5 5.0 tyramine tryptamine, 2.0 2-phenylethylamine.The recovery from spiked samples between 97.3 108.6% at levels 15 (R > 0.999).The relative...

Herein, a novel IR NLO oxytelluride Sr3Ge2O4Te3 was successfully designed and synthesized through "partial O-to-Te substitution" strategy. Compared with the parent oxide, not only achieves phase-matchability transition (from NPM to PM), but also greatly improves linear performances, including wide band gap (2.26 eV), strong SHG response (1.3 × AgGaSe2) large optical anisotropy (Δn = 0.152@2090 nm). The analyses of structure-property relationship SHG-density indicate that bridging oxygen in...

A sensorless control system of a permanent magnet synchronous motor based on an extended Kalman filter (EKF) algorithm faces problems with inaccurate or mismatched process noise statistics. This problem affects the performance filter, resulting in estimation speed. To address above problem, this paper proposes parameter-adaptive that does not depend precise covariance. method can significantly reduce negative impact statistical mismatch speed estimation. In addition, uses adaptive covariance...

Metal thiophosphates have outstanding properties for the generation of mid-infrared coherent light and are an emerging nonlinear optical material system. In this study, a new non-centrosymmetric (NCS) quaternary alkaline-earth metal thiophosphate, SrAgPS4, was obtained via high-temperature solid-state method. The compound crystallizes in NCS Ama2 (No. 40) space group features two-dimensional [AgPS4]2- layers consisting alternately connected [PS4] [AgS4] tetrahedra. SrAgPS4 exhibits strong...

A new noncentrosymmetric (NCS) quaternary sulfide, SrAgAsS4, was obtained via the strategy of aliovalent substitution based on centrosymmetric (CS) SrGa2S4. The compound features two-dimensional [AgAsS4]2- layers, which are composed alternately connected [AsS4] tetrahedra and [AgS4] tetrahedra. Importantly, SrAgAsS4 exhibits a strong phase-matched second-harmonic generation response (1.35 × AgGaS2 at 2100 nm) has suitable birefringence (0.15@2100 moderate band gap (2.31 eV). first-principles...