Potassium Tetraiodatoiodate(III) Iodate(V): A Nonlinear Optical Crystal with Exceptional Second-Harmonic Generation and Full-Wavelength Phase Matching - Details

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The　development　of　nonlinear　optical　materials　with　large　nonlinear　optical　susceptibilities,　wide　transmission　ranges,　and　comprehensive　full-wavelength　phase　matching　capabilities　remains　a　significant　challenge.　In　this　study,　we　synthesized　a　novel　potassium　tetraiodatoiodate(III)　iodate(V)　via　an　in-situ　reduction　and　complexation　reaction.　The　resulting　compound,　K2[IIII(IVO3)4]IVO3,　exhibits　exceptional　second-harmonic　generation　responses　(21.6KH2PO4　at　1064 nm,　1.0KTiOPO4　at　2050 nm),　a　wide　transparency　range　from　the　visible　to　the　mid-infrared　wavelengths　(0.37–6.05　and　7.03–13.40 µm),　and　a　high　birefringence　(0.358　at　543 nm)　to　achieve　full-wavelength　phase　matching.　These　properties　are　primarily　ascribed　to　the　synergistic　substantial　hyperpolarizability　and　polarizability　anisotropy　exhibited　by　the　[IIII(IVO3)4]−　complex　ions,　which　comprise　square-planar　coordinated　trivalent　iodine　and　optimally　arranged　iodate　ligands.　This　study　demonstrates　the　pivotal　role　of　nonmetallic　cation　centered　coordination　entities　in　influencing　linear　and　nonlinear　optical　properties,　a　discovery　that　has　significant　implications　for　the　development　of　innovative　inorganic　functional　materials.　©　2025　Wiley-VCH　GmbH.

Keyword：

Coordination compound Full-wavelength phase matching Hypervalent iodine NLO materials Partial reduction reaction

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[ 1 ] [Lin M.-Q.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 2 ] [Lin M.-Q.]College of Chemistry, Fuzhou University, Fuzhou, 350108, China
[ 3 ] [Lin M.-Q.]Fujian College, University of Chinese Academy of Sciences, Fuzhou, 350002, China
[ 4 ] [Hu C.-L.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 5 ] [Hu C.-L.]University of Chinese Academy of Sciences, Beijing, 100039, China
[ 6 ] [Duan M.-F.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 7 ] [Duan M.-F.]College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China
[ 8 ] [Duan M.-F.]Fujian College, University of Chinese Academy of Sciences, Fuzhou, 350002, China
[ 9 ] [Li B.-X.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 10 ] [Li B.-X.]University of Chinese Academy of Sciences, Beijing, 100039, China
[ 11 ] [Mao J.-G.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 12 ] [Mao J.-G.]University of Chinese Academy of Sciences, Beijing, 100039, China
[ 13 ] [Mao J.-G.]Fujian College, University of Chinese Academy of Sciences, Fuzhou, 350002, China
[ 14 ] [Yang B.-P.]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
[ 15 ] [Yang B.-P.]University of Chinese Academy of Sciences, Beijing, 100039, China
[ 16 ] [Yang B.-P.]Fujian College, University of Chinese Academy of Sciences, Fuzhou, 350002, China

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Angewandte Chemie - International Edition

ISSN： 1433-7851

Year： 2025

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JCR@2023

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