A New Mixed Halide, Cs2HgI2Cl2: Molecular Engineering for a New Nonlinear Optical Material in the Infrared Region
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- 作者：Gang Zhang ; Yanjun Li ; Kui Jiang ; Huiyi Zeng ; Tao Liu ; Xingguo Chen ; Jingui Qin ; Zheshuai Lin ; Peizhen Fu ; Yicheng Wu ; Chuangtian Chen
- 刊名：The Journal of the American Chemical Society
- 出版年：2012
- 出版时间：September 12, 2012
- 年：2012
- 卷：134
- 期：36
- 页码：14818-14822
- 全文大小：303K
- 年卷期：v.134,no.36(September 12, 2012)
- ISSN：1520-5126
文摘
A new mixed halide, Cs2HgI2Cl2, which contains the highly polar tetrahedron of anion (HgI2Cl2)2鈥?/sup>, has been designed and synthesized by reaction in solution. In its single crystal, the isolated (HgCl2I2)2鈥?/sup> groups are arranged to form chains. The chains are then further connected into a three-dimensional framework through the Cs atoms that occupy the empty spaces surrounded by halide atoms. All the polar (HgCl2I2)2鈥?/sup> groups align in such a way that gives a net polarization, leading it to show a phase matchable second harmonic generation (SHG) effect as strong as that of KH2PO4 (KDP) based on the powder SHG measurement. It also displays excellent transparency in the range of 0.4鈥?1 渭m with relatively high thermal stability. A preliminary measurement indicates that its laser-induced damage threshold is about 83 MW/cm2, about twice that of AgGaS2. This study demonstrates that Cs2HgI2Cl2 is a promising nonlinear optical material in the infrared region.