Volume 131, Issue 34 pp. 11792-11795
Zuschrift

REI5O14 (RE=Y and Gd): Promising SHG Materials Featuring the Semicircle-Shaped I5O143− Polyiodate Anion

Jin Chen

Jin Chen

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 P. R. China

University of the Chinese Academy of Sciences, Beijing, 100039 P. R. China

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Dr. Chun-Li Hu

Dr. Chun-Li Hu

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 P. R. China

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Dr. Fei-Fei Mao

Dr. Fei-Fei Mao

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 P. R. China

University of the Chinese Academy of Sciences, Beijing, 100039 P. R. China

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Dr. Bing-Ping Yang

Dr. Bing-Ping Yang

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 P. R. China

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Xiao-Han Zhang

Xiao-Han Zhang

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 P. R. China

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Prof. Jiang-Gao Mao

Corresponding Author

Prof. Jiang-Gao Mao

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002 P. R. China

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First published: 17 June 2019
Citations: 23

Abstract

The first examples of rare-earth polyiodates, namely, REI5O14 (RE=Y and Gd), have been prepared by hydrothermal reactions of RE2O3 and H5IO6 in H3PO4 (≥85 wt % in H2O), with extremely high yields (>95 %). They crystalize in the polar space group Cm and feature a brand-new semicircle-shaped [I5O14]3− pentameric polyiodate anion composed of two IO3 and three IO4 polyhedra. Remarkably, both compounds exhibit very large second-harmonic generation (SHG) signals (14× and 15×KH2PO4 (KDP) upon 1064 nm laser radiation for Y and Gd compounds, respectively). Our work shows that the hydrothermal reaction in a phosphoric acid medium facilitates the formation of rare-earth polyiodates.

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