New Series of Polar and Nonpolar Platinum Iodates A2Pt(IO3)6 (A = H3O, Na, K, Rb, Cs)

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• 作者：Bing-Ping Yang ; Chun-Li Hu ; Xiang Xu ; Jiang-Gao Mao
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：March 7, 2016
• 年：2016
• 卷：55
• 期：5
• 页码：2481-2487
• 全文大小：469K
• ISSN：1520-510X

文摘

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]^2– 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.