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Li7(TeO3)3F: A Lithium Fluoride Tellurite with Large Second Harmonic Generation Responses and a Short Ultraviolet Cutoff Edge
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2017-11-13 00:00:00 , DOI: 10.1021/acs.inorgchem.7b02670
Jiang-He Feng 1, 2 , Chun-Li Hu 1 , Hou-Ping Xia 3 , Fang Kong 1 , Jiang-Gao Mao 1
Affiliation  

Here, the combination of the strong electropositive lithium and the most electronegative fluorine with the TeO3 group afforded the first lithium fluoride tellurite, namely, Li7(TeO3)3F (P63), which was synthesized by solid-state reactions. Its structure features a novel three-dimensional anionic framework of [Li7O9F]12– composed of LiO3F and LiO4 tetrahedra with one-dimensional hexagonal tunnels of 12-membered rings along the c-axis, filled by the “isolated” ψ-TeO3 tetrahedra. Notably, this compound displays the largest band gap of 4.75 eV among all of the non-centrosymmetric metal-tellurites reported so far, as well as strong second harmonic generation (SHG) responses (3 × KH2PO4 @1064 nm, 0.2 × β-BaB2O4 @532 nm) and a large laser damage threshold (73 × AgGaS2). Furthermore, theoretical calculations reveal that the LiO4 and LiO3F tetrahedra also contribute significantly to the SHG response (∼30%).

中文翻译:

Li 7(TeO 33 F:氟化锂亚碲酸盐,具有大的第二谐波产生响应和较短的紫外线截止边缘

在这里,强电正性锂和最具负电性的氟与TeO 3基团的组合提供了第一氟化锂亚碲酸盐,即Li 7(TeO 33 F(P 6 3),它是通过固相反应合成的。其结构具有[Li 7 O 9 F] 12-的新型三维阴离子骨架,该骨架由LiO 3 F和LiO 4四面体组成,沿c轴具有一维十二元环的六边形隧道,并用“分离的”ψ-的TeO 3四面体。值得注意的是,该化合物在迄今为止报道的所有非中心对称金属锂铁矿中显示出4.75 eV的最大带隙,以及强大的二次谐波生成(SHG)响应(3×KH 2 PO 4 @ 1064 nm,0.2× β-BAB 2 ö 4 @ 532纳米)和大的激光损伤阈值(73×AgGaS 2)。此外,理论计算表明,LiO 4和LiO 3 F四面体也对SHG响应有显着贡献(约30%)。
更新日期:2017-11-13
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