Meng Chang-Yu, Zhang Pei, Wang Rong-Fang, Geng Lei
Department of Chemistry and Food Science, Yulin Normal University, Yulin, Guangxi 537000, China.
Department of Physics and Electronic Information, Huaibei Normal University, Huaibei, Anhui 235000, China.
Dalton Trans. 2017 Sep 28;46(36):12320-12327. doi: 10.1039/c7dt02795h. Epub 2017 Sep 11.
A new polar material AgI[(MoO)(IO)], which contains the extended 2D [(MoO)(IO)] molybdenyl iodate framework found in the known noncentrosymmetric material K[(MoO)(IO)], has been synthesized through the conventional hydrothermal method at 200 °C. It crystallizes in the orthorhombic system space group Pna2 with a = 8.0072(2) Å, b = 21.2678(6) Å, c = 7.3241(2) Å, and V = 1247.26(6) Å. Its structure features 2D corrugated [(MoO)(IO)] anionic layers with neighboring anionic layers stitched through 1D [IAg] cationic chains to form a 3D structure. The 1D [IAg] cationic chain acts as the template for parallel alignments of the polar iodate anions along the c axis in 2D [(MoO)(IO)] anionic layers, which leads to the polar structure of the material. Second-harmonic generation (SHG) measurements on AgI[(MoO)(IO)] 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.
一种新的极性材料AgI[(MoO)(IO)]已通过传统水热法在200°C下合成，该材料包含在已知的非中心对称材料K[(MoO)(IO)]中发现的扩展二维[(MoO)(IO)]钼酸碘框架。它结晶于正交晶系空间群Pna2，a = 8.0072(2) Å，b = 21.2678(6) Å，c = 7.3241(2) Å，V = 1247.26(6) Å。其结构特征是二维波纹状[(MoO)(IO)]阴离子层，相邻阴离子层通过一维[IAg]阳离子链缝合形成三维结构。一维[IAg]阳离子链作为极性碘酸根阴离子在二维[(MoO)(IO)]阴离子层中沿c轴平行排列的模板，这导致了该材料的极性结构。在1064 nm激光辐射下，对AgI[(MoO)(IO)]的二次谐波产生（SHG）测量显示其SHG效率适中，约为KDP参比样品的0.7倍。此外，还对该化合物进行了热重分析（TGA）和光学测量。
