A new polar material Ag₃I[(MoO₃)₂(IO₃)₂], which contains the extended 2D [(MoO₃)₂(IO₃)₂]_∞²ⁿ⁺ molybdenyl iodate framework found in the known noncentrosymmetric material K₂[(MoO₃)₂(IO₃)₂], has been synthesized through the conventional hydrothermal method at 200 °C. It crystallizes in the orthorhombic system space group Pna2₁ with a = 8.0072(2) Å, b = 21.2678(6) Å, c = 7.3241(2) Å, and V = 1247.26(6) ų. Its structure features 2D corrugated [(MoO₃)₂(IO₃)₂]_∞²ⁿ⁺ anionic layers with neighboring anionic layers stitched through 1D [IAg₃]_∞²ⁿ⁺ cationic chains to form a 3D structure. The 1D [IAg₃]_∞²ⁿ⁺ cationic chain acts as the template for parallel alignments of the polar iodate anions along the c axis in 2D [(MoO₃)₂(IO₃)₂]_∞²ⁿ⁺ anionic layers, which leads to the polar structure of the material. Second-harmonic generation (SHG) measurements on Ag₃I[(MoO₃)₂(IO₃)₂] show a moderate SHG efficiency of about 0.7 times that of the KDP reference under 1064 nm laser radiation. In addition, the thermogravimetric analyses (TGA) and optical measurements of the compound were also carried out.

中文翻译：

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的Ag ₃ I [（的MoO ₃）₂（IO ₃）₂ ]：从由极化阳离子（AG氧钼碘酸架构的结构调制合成的新的极性材料⁺）和阴离子（I ^- ）

一种新的极性材料的Ag ₃ I [（的MoO ₃）₂（IO ₃）₂ ]，其中包含扩展2D [（的MoO ₃）₂（IO ₃）₂ ] _∞ ^{2 Ñ +}氧钼碘酸框架在已知的非中心对称材料中发现K ₂ [（MoO ₃）₂（IO ₃）₂ ]通过常规水热法在200℃下合成。该晶体斜方晶系，空间群为PNA 2 ₁与一个= 8.0072（2）埃，b = 21.2678（6），C ^ = 7.3241（2）埃，V = 1247.26（6）³。其结构特点2D波纹[（的MoO ₃）₂（IO ₃）₂ ] _∞ ^{2 Ñ +}与邻近至1D [IAG缝合阴离子层的阴离子层₃ ] _∞ ^{2条Ñ +}阳离子链以形成3D结构。一维[IAG ₃ ] _∞ ^{2 Ñ +}阳离子链充当模板用于沿着所述极性碘酸阴离子的平行对准Ç轴在2D [（的MoO ₃）₂（IO ₃）₂ ] _∞ ^{2 Ñ +}阴离子层，其导致材料的极性结构。在Ag ₃ I [（MoO ₃）₂（IO ₃）₂ ]上的二次谐波生成（SHG）测量显示，在1064 nm激光辐射下，中等的SHG效率约为KDP参考的0.7倍。此外，还进行了化合物的热重分析（TGA）和光学测量。