Yang Bing-Ping, Hu Chun-Li, Xu Xiang, Mao Jiang-Gao
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou 350002, People's Republic of China.
Inorg Chem. 2016 Mar 7;55(5):2481-7. doi: 10.1021/acs.inorgchem.5b02859. Epub 2016 Feb 5.
A new series of platinum iodates, namely, α-(H3O)2Pt(IO3)6, β-(H3O)2Pt(IO3)6, and A2Pt(IO3)6 (A = Na, K, Rb, Cs), have been synthesized. Interestingly, among these six stoichiometrically identical compounds, α-(H3O)2Pt(IO3)6 is polar, whereas other compounds are nonpolar and centrosymmetric. They all consist of zero-dimensional Pt(IO3)6 molecular units separated by H3O(+) or A(+) cations. All of the lone electron pairs of the IO3(-) groups are aligned and almost point to one direction for α-(H3O)2Pt(IO3)6, whereas IO3(-) groups are located trans to each other in other compounds. The material, α-(H3O)2Pt(IO3)6, exhibits very strong second harmonic generation (SHG) effects, approximately 1.2 × KTiOPO4 (KTP), and is phase-matchable. Thermogravimetric analysis, elemental analysis, infrared spectra, UV-vis spectra, nonlinear optical properties, and theoretical calculations are also reported.
已经合成了一系列新的碘酸铂，即α-(H₃O)₂Pt(IO₃)₆、β-(H₃O)₂Pt(IO₃)₆和A₂Pt(IO₃)₆（A = Na、K、Rb、Cs）。有趣的是，在这六种化学计量相同的化合物中，α-(H₃O)₂Pt(IO₃)₆是极性的，而其他化合物是非极性且中心对称的。它们都由被H₃O⁺或A⁺阳离子隔开的零维Pt(IO₃)₆分子单元组成。对于α-(H₃O)₂Pt(IO₃)₆，IO₃⁻基团的所有孤电子对都排列并几乎指向一个方向，而在其他化合物中IO₃⁻基团彼此呈反式排列。材料α-(H₃O)₂Pt(IO₃)₆表现出非常强的二次谐波产生（SHG）效应，约为1.2×KTiOPO₄（KTP），并且是相位匹配的。还报道了热重分析、元素分析、红外光谱、紫外可见光谱、非线性光学性质和理论计算。
