Synthesis, structure, and electronic properties of the LiRbGdTeO single crystal.

Materials with spin dimers have attracted much attention in the last several decades because they could provide a playground to embody simple quantum spin models. For example, the Bose-Einstein condensation of magnons has been observed in TlCuCl with anti-ferromagnetic CuCl dimers. In this work, we have synthesized a new kind of single-crystal LiRbGdTeO with GdO dimers.

White-Light Emission from a Semi-Conductive Borate-Stannate.

In response to ever-increasing application requirements in lighting and displays, a tremendous emphasis is being placed on single-component white-light emission. Single-component inorganic borates doped with rare earth metal ions have shown prominent achievements in white-light emission. The first environmentally friendly defect-induced white-light emitting crystalline inorganic borate, Ba [Sn(OH) ][B(OH) ] , has been prepared.

BaBi(Si B O) ( = 0.09): a new acentric metal borosilicate as a promising nonlinear optical material.

A new acentric metal borosilicate, namely BaBi(Si B O) ( = 0.09), has been synthesized by a standard solid-state reaction. The title compound crystallizes in noncentrosymmetric (NCS) space group 4[combining macron]2 with lattice parameters = 11.

A Facile Route to Nonlinear Optical Materials: Three-Site Aliovalent Substitution Involving One Cation and Two Anions.

Two mixed-metal gallium iodate fluorides, namely, α- and β-Ba [GaF (IO ) ](IO ) (1 and 2), have been designed by the aliovalent substitutions of α- and β-Ba [VO F (IO ) ](IO ) (3 and 4) involving one cationic and two anionic sites. Both 1 and 2 display large second-harmonic generation responses (≈6×KH PO (KDP)), large energy band gaps (4.61 and 4.

Three Cadmium Tartratoborates with Good Second Harmonic Generation (SHG) or Luminescence Performances.

Three new cadmium(II) tartratoborates, namely, Cd[(CHO)B](HO)·3HO (1), KCd[(CHO)B](HO) (2), and LiKCd[(CHO)B](HO) (3), have been successfully synthesized by the hydrothermal method. Compounds 1-3 belong to centric C2/ c, acentric Pc, and the polar C2, respectively. Through based on the same hybrid borate-tartrate [(CHO)B] anions, they exhibit different structures.

Chiroptical Activity from an Achiral Biological Metal-Organic Framework.

Chiroptical activity is observed from an achiral adenine-containing metal-organic framework (MOF) named ZnFDCA. Such a seemingly counterintuitive phenomenon can, in fact, be predicted by the intrinsic crystal symmetry of 4̅2 m point group. Although theoretically allowed, examples of optically active achiral crystals are extremely rare.

Li(TeO)F: A Lithium Fluoride Tellurite with Large Second Harmonic Generation Responses and a Short Ultraviolet Cutoff Edge.

Here, the combination of the strong electropositive lithium and the most electronegative fluorine with the TeO group afforded the first lithium fluoride tellurite, namely, Li(TeO)F (P6), which was synthesized by solid-state reactions. Its structure features a novel three-dimensional anionic framework of [LiOF] composed of LiOF and LiO tetrahedra with one-dimensional hexagonal tunnels of 12-membered rings along the c-axis, filled by the "isolated" ψ-TeO tetrahedra. Notably, this compound displays the largest band gap of 4.

AgGa PS : A New Mid-Infrared Nonlinear Optical Material with a High Laser Damage Threshold and a Large Second Harmonic Generation Response.

To develop new mid-infrared (MIR) nonlinear optical (NLO) materials, which can overcome the low laser damage threshold (LDT) of the commercial MIR-NLO crystals (AgGaS , AgGaSe and ZnGeP ) and simultaneously keep the large NLO susceptibility, is necessary for high-power MIR laser frequency conversion technology. To improve the LDT, a new strategy of increasing lattice stability was adopted. Here, the strongly covalent structural unit of the PS tetrahedron was introduced into AgGaS (AGS), and that led to the isolation of the first compound in Ag -Ga -P -S system, namely, AgGa PS (Cc).

Na2RE2TeO4(BO3)2 (RE = Y, Dy-Lu): luminescent and structural studies on a series of mixed metal borotellurates.

The first examples of metal borotellurates, namely, Na2RE2TeO4(BO3)2 (RE = Y, Dy-Lu) have been prepared by using solid-state reactions. They possess similar structures and crystallize in space group P21/c (No. 14).

[Optimization of the ultrasound assisted extraction of saikosaponins from Bupleurum falcatum using response surface methodology].

Objective: To investigate the optimization of extraction conditions of saikosaponins a, c and d from Bupleurum falcatum.

Methods: Experimental factors and levels were firstly selected by one-factor test. According to the central composite experimental design principle, the response surface methodology with 3 factors and 3 levels was adopted.