Five New Silver Rare‐Earth Iodates, AgLn(IO₃)₄ (Ln=Pr, Sm, Dy, Er and Tm): Synthesis, Structures and Properties

Abstract

Five new silver rare‐earth iodates AgLn(IO3)4 (Ln= Pr, Sm, Dy, Er and Tm) have been synthesized first time by hydrothermal method, and their structures are confirmed by single crystal X‐ray diffraction. They are isomorphic of previous characterized AgM(IO3)4 (With M= Y, La, Nd, Eu, Gd, Bi) compounds and all crystallized in noncentrosymmetric (NCS) structure. Their structures contain LnO8 polyhedrons, which are interconnected through IO3 groups to form a complex two dimensional (2D) layer. Their powders all show nonlinear optical (NLO) effects which are 2.3 ‐ 4 times stronger than KH2PO4 (KDP) respectively. Energy dispersive X‐ray spectroscopy (EDS), Infrared region (IR) spectra, Ultra‐visible (UV/Vis) spectra and thermogravimetric analysis (TGA) are also performed.

RE(OH)2NO3 (RE = Tb, Dy, Ho, and Er): Synthesis and Nonlinear Optical Properties of Water-Resistant Lanthanide Hydroxide Nitrates

“…1 absorbs neither the fundamental frequency light nor the doubled-frequency light, so it shows undiminished strong SHG responses of the RE­(OH) 2 NO 3 family. Similar phenomena but with less intensity can be seen in lanthanide-containing iodates with the NLO effect. − …”

Anhydrous Aluminum Iodate: Strong Second Harmonic Generation Effect Contributed by Unbonded and Antibonding Orbitals

“…This includes metal iodate fluorides synthesized using a mixed anion strategy, such as Ce(IO 3 ) 3 F, 4 Bi(IO 3 )F 2 , 5 and ABi 2 (IO 3 ) 2 F 5 (A = K, Rb, and Cs), 6 as well as mixed-metal iodates formed by introducing other additional metal ions, such as LiMg(IO 3 ) 3 7 and LiM II (IO 3 ) 3 (M II = Zn and Cd), 8 AgLn(IO 3 ) 4 (Ln = Pr, Sm, Dy, Er, and Tm). 9 In addition, some iodates containing HIO 3 molecules were also discovered, such as Sm 3 (IO 3 ) 9 (HIO 3 ) 4 , 10 M(IO 3 ) 2 (HIO 3 ) (M = Ca and Sr), 11 and La(IO 3 ) 3 (HIO 3 ). 12 Recently, mixed-metal/anionic iodates containing IIIA group Ga 3+ or In 3+ cations have also emerged with many new NLO materials, such as NaGa-(IO 3 ) 4 , 13 αand β-Ba 2 [GaF 4 (IO 3 ) 2 ]IO 3 , 14 and Ba-[InF 3 (IO 3 ) 2 ].…”

Chromium iodate: the structure and origin of optical second harmonic generation

“…Relevant material design strategies primarily involve incorporating various anions and/or cations into the structure to form NLO crystals with superior performance, such as Ce(IO 3 ) 3 F, 1 Bi(IO 3 )F 2 , 2 ABi 2 (IO 3 ) 2 F 5 (A = K, Rb, and Cs), 3 Li 2 Ge(IO 3 ) 6 , 4 LiMg(IO 3 ) 3 , 5 LiM II (IO 3 ) 3 (M II = Zn and Cd), 6 and AgLn(IO 3 ) 4 (Ln = Pr, Sm, Dy, Er, and Tm). 7 With the deepening of research, almost all monometallic iodates have been studied, 6,8 while the crystalline Cr(IO 3 ) 3 (CIO), which can be used for single crystal structure analysis and NLO research, has not been obtained due to difficulties in synthesis. In 2007, researchers synthesized the solid solution bimetallic iodate In 1−x Cr x (IO 3 ) 3 (0 ≤ x ≤ 0.5) through the hydrothermal method, but it cannot be used for single crystal structure analysis and SHG testing.…”

“…Relevant material design strategies primarily involve incorporating various anions and/or cations into the structure to form NLO crystals with superior performance, such as Ce(IO 3 ) 3 F, 1 Bi(IO 3 )F 2 , 2 ABi 2 (IO 3 ) 2 F 5 (A = K, Rb, and Cs), 3 Li 2 Ge(IO 3 ) 6 , 4 LiMg(IO 3 ) 3 , 5 LiM II (IO 3 ) 3 (M II = Zn and Cd), 6 and AgLn(IO 3 ) 4 (Ln = Pr, Sm, Dy, Er, and Tm). 7…”