Na₆MQ₄ (M=Zn, Cd; Q=S, Se): Promising New Ternary Infrared Nonlinear Optical Materials

Abstract

Four sodium‐based ternary IR nonlinear optical (NLO) materials, Na6MQ4 (M=Zn, Cd; Q=S, Se), were prepared through a high‐temperature flux method. The crystal structure of the compounds is built up of isolated [MQ4] tetrahedra and a 3D framework formed by the NaQn (n=4, 5) units. The two selenides, Na6MSe4 (M=Zn, Cd), as promising IR NLO materials, show moderate second‐harmonic generation (SHG) responses (0.9 and 0.5×AgGaS2) with good phase‐matching behavior, as well as high laser damage thresholds (2 and 1.9×AgGaS2). The two sulfides, Na6MS4 (M=Zn, Cd), exhibit higher laser damage thresholds (13 and 4×AgGaS2), but smaller SHG responses (0.3 and 0.2×AgGaS2). Theoretical calculations and statistical analyses indicate that the SHG effect and band gap in the compounds originate mainly from the distorted NaQ4 NLO‐active units with a short Na−S bond length, which provides a new insight into the design of novel IR NLO materials.

Two new tellurite halides with cationic layers: syntheses, structures, and characterizations of CdPb2Te3O8Cl2 and Cd13Pb8Te14O42Cl14

“…S9†). 55,56 However, the SHG intensities are not increased with the increase of particle sizes in the two measurements. This means that the compound is not in accordance with the type I phase-matching behavior due to its small birefringence of ∼0.009 at 1064 nm (Fig.…”

Bio‐waste Derived Catalytic Approach Towards NH‐1,2,3‐Triazole Synthesis

“…NH‐1,2,3‐triazoles which can be synthetically modified by incorporation of aryl, alkyl or acyl functionalization, have been particularly useful in formation of N 2 ‐substituted‐1,2,3‐triazoles [11–13] . Moreover, many pharmaceutically active molecules contain NH‐1,2,3‐triazole motif as an integral part [14–18] . Compared to direct synthesis of substituted triazoles, NH‐1,2,3‐triazole synthesis is much complex.…”

“…[11][12][13] Moreover, many pharmaceutically active molecules contain NH-1,2,3-triazole motif as an integral part. [14][15][16][17][18] Compared to direct synthesis of substituted triazoles, NH-1,2,3-triazole synthesis is much complex. Typical methods for the synthesis of 4-aryl-NH-1,2,3-triazoles involve cycloaddition of alkynes and TMSN 3 and subsequent deprotection of the TMS group.…”

Syntheses, Structures and Properties of Alkali and Alkaline Earth Metal Diamond-Like Compounds Li2MgMSe4 (M = Ge, Sn)

“…The XPREP program was used for the absorption correction (multiscan), the structures of Li 2 MgMSe 4 (M = Sn, Ge) were checked by PLATON in case of additional symmetry elements [ 29 , 30 , 31 ]. The detailed processes can be found in previous works [ 9 , 14 , 32 , 33 ]. It is worth noting that the initial Li/Mg occupation from refinement was 0.53715:0.462850 for Li 2 MgSnSe 4 , and 0.48933:0.51067 for Li 2 MgGeSe 4 , which is close to 1:1.…”

“…The exploration of advanced functional materials, as well as the development of structural chemistry, depends on the fabrication of new compounds with a special crystal structure, which contains distinctive physical and chemical behaviors [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. A diamond-like (DL) structure compound, exhibiting abundant chemical diversities and adjustable optical properties, has been proven as a valid structural framework for the design and fabrication of new infrared (IR) optical materials, especially for the mid- or far-IR nonlinear optical (NLO) materials.…”