Mid-infrared (MIR) nonlinear optical (NLO) materials play a crucial role in laser technology applications, yet their rational structural design remains significant challenge. In this article, guided by the aliovalent substitution strategy, two novel MIR NLO crystals, Rb4CdV5O15Br and Rb3CdV4O12Br, were designed successfully synthesized. crystallizes noncentrosymmetric tetragonal space group P4, featuring two-dimensional (2D) [CdV5O15Br]∞ layer structure. The functional units of structure...

Novel double-tunnel compounds AxRE2Cu6–xTe6 (A = K–Cs; RE La–Nd) have been synthesized from the elemental mixtures in ACl flux at 1123 K and crystallized hexagonal P63/m, with a 9.955(3)–10.0841(6) Å, c 4.1487(6)–4.2366(6) Z 1. A nice reconstruction of CuTe4-based anionic network has driven by cationic substitution 3 Ba2+ combination x A+ 2 RE3+ on going Ba3Cu6Te6 to title compounds. The undoped sintered polycrystalline La-, Ce-, Pr-sample (containing 2–4% CsCl impurity) realized figure...

A formal thio [3+2] cyclization catalyzed by Takemoto’s organocatalyst has been reported for the construction of optically active spiroannulated dihydrothiophenes in high yields with excellent regio-, chemo-, diastereo-, and enantioselectivities.

A novel polar material oxychloride BaBi(SeO₃)₂Cl with high SHG efficiency (∼16 × KDP) has been synthesized and characterized.

A novel iodate oxychloride Bi₂Te(IO₃)O₅Cl with a second-order nonlinear optical response originating from constructive stacking of dipole moments IO₃.

Two novel lanthanoid thioantimonates [Sm4(tepa)4(μ-η2,η3-Sb3S7)2(μ-Sb2S4)] (1, tepa = tetraethylenepentamine) and [Eu2(tepa)2(μ-SbS3)(μ-OH)]2(SbS4)(OH)·H2O (2) were solvothermally synthesized. Compound 1 represents the only example of different types [Sb3S7]5− [Sb2S4]2− anions coexisting in same thioantimonate framework, while 2 displays rare mixed-valent Sb3+/Sb5+ character with Sb3+ a noncondensed pyramid [SbIIIS3]3−. The theoretical band structure luminescence properties have also been...

Abstract It is extremely challenging to accomplish second‐harmonic generation (SHG) in the whole mid‐infrared (MIR) region for oxide crystals due their short IR absorption cutoff wavelengths. Herein, a new MIR nonlinear optical (NLO) crystal of K 4 ZnV 5 O 15 Cl (KZVC) designed and synthesized by aliovalent substitution [V III ] with [Zn II Cl] based on 2 (VO)(V 7 ) matrix. KZVC features an ordered 2D [ZnV ∞ layered structure comprising [ZnO / [VO square pyramids tetrahedron as functional...

Abstract An unexpected and efficient domino reaction of N ‐sulfonyl‐1‐aza‐1,3‐dienes with 2‐halo‐1,3‐dicarbonyl compounds to synthesize differently substituted 2,3‐dihydrofuran derivatives excellent regio‐, chemo‐, stereoselectivity in moderate good yields was developed. In this transformation, broad substrate scope demonstrated, a plausible mechanism for novel given.

A new series of quaternary CsRE2Ag3Te5 (RE = Pr, Nd, Sm, Gd–Er) and RbRE2Ag3Te5 Gd–Dy), which have been synthesized from the elemental mixtures in ACl flux (A Rb, Cs) crystallized orthorhombic space group Cmcm, with a 4.620(2)–4.504(2) Å, b 16.232(8)–16.027(8) c 18.84(1)–18.32(2) Z 4, are isostructural to RbSm2Ag3Se5. These ARE2Ag3Te5 feature three-dimensional tunnel framework constructed by ionically bound RETe6 octahedron covalently AgTe4 tetrahedron tunnels filled A. Typical...

Novel bismuth selenite iodate oxide BiSeIO6 was synthesized in a mild hydrothermal condition. crystallized the polar space group Pna21 of an orthorhombic system. The crystal structure features three-dimensional framework composed three types lone pair cations with distorted BiO7 polyhedra, SeO3 pyramids, and IO3 pyramids one structure. Interestingly, exhibits strong phase-matchable second-harmonic generation (SHG) ∼6 times that KH2PO4 (KDP). Dipole moment analysis shows all local acentric...

Two novel selenite oxychlorides Pb2MCu(SeO3)4Cl(H2O) (M = Fe, Ga) were hydrothermally synthesized and structurally characterized. They are isostructural crystallize in the two-dimensional [MCu(SeO3)4Cl(H2O)]4– anionic layer structure mediated with hydrogen bonds aligned between neighboring layers which assist building three-dimensional framework a polar space group. Optical properties measurements revealed that optical band gaps 2.61 3.22 eV for Pb2FeCu(SeO3)4Cl(H2O) (1)...

A new noncentrosymmetric compound Ag₃I[(MoO₃)₂(IO₃)₂] has been hydrothermally synthesized and characterized.

Abstract An expedient and practical route for realizing a novel, substrate‐controlled diastereoselective switch strategy has been successfully developed. The [4+1] annulation of thioamides with sulfur ylides proceeded smoothly via Michael addition triggered sequential process, trans ‐dihydrothieno[3,4‐ c ]coumarins were obtained because steric hindrance effects between the benzoyl group unit 2 H ‐chromen‐2‐one as shown in Newman projection. Nucleophilic substitution was observed key step...

A novel mid-infrared (MIR) nonlinear optical (NLO) crystal Rb4ZnV5O15Cl (RZVC) has been designed and sythesized by the aliovalent substitution strategy based on parent structure Rb2(VO)(V2O7). Modification of square pyramidal VO5 units through introduction chlorine ion zinc metal caion significantly enhanced dipole moments in a unit cell from 1.653 D for Rb2(VO)(V2O7) to 6.559 RZVC. As consequence, polycrystalline RZVC exhibits strong SHG responses 12.5 × KDP @1064 nm 1.2 AGS @2 μm. In...

Introduction of divalent metal oxides into the TeO2 matrix can produce chemical formula Mn[TemO2m+n] ≡ (MO)n(TeO2)m, compounds in which provide oxygen ions to parent compound TeO2, cleave neutral Te–O net form various tellurium(IV) oxide anion [TemO2m+n]2n− and cations as balanced charges. isolated anion, discrete polyanion, one-dimensional chain ribbon two-dimensional (2D) layered 3D tunnel polyanion depending on ratio MO/TeO2. In this work, a new type inorganic AE2[Ni(Te4O10)Cl2]...

Abstract The polar compound Pb 2 (SeO 3 )(NO ) is prepared by hydrothermal reaction of Pb(NO , SeO and H O (autoclave, 200 °C, 4 d, 75% yield).