Centrosymmetric Rb[Te₂O₄(OH)₅] and noncentrosymmetric K₂[Te₃O₈(OH)₄]: metal tellurates with corner and edge-sharing (Te₄O₁₈)¹²⁻ anion groups

Abstract

New nonlinear optical (NLO) crystals have become urgent need for extending laser wavelengths. By cation substitution between alkali metal (K+, Rb+), anion group arrangement transition were realized, and centrosymmetric Rb[Te2O4(OH)5]...

From AgTeO2F and Ag2(TeO2F2) to Ag3F3(TeF6)(TeO2)12: the first silver tellurite oxyfluorides with linear and nonlinear optical properties

“…The Te-O bond distances are in the range of 1.832(4)-2.162(4) Å and the Te-F bond length is 2.029(4) Å, which are consistent with the reported metal tellurites. 43,[52][53][54][55][56][57] The calculated total bond valences for Ag and Te are 0.825 and 4.031, indicating their oxidation states of +1 and +4 respectively (Table S2…”

AAl(Te4O10) (A = Na, Ag) and K2Ga2(HTe6O16)(HTeO3): Three Aluminum/Gallium Tellurites with Large Birefringence and Wide Band Gap

“…They may be used as nonlinear-optical (NLO) materials, birefringent materials, magnetic materials, and other applications. − Te IV cations when coordinated with O atoms can form three different basic anionic building blocks, namely, [TeO 3 ] 2– , [TeO 4 ] 4– , and [TeO 5 ] 6– , such as the tellurite groups in Ba­(MoO 2 F) 2 (TeO 3 ) 2 , Li 7 (TeO 3 ) 3 F, Ba­(MoOF 2 )­(TeO 4 ), Bi 2 TeO 5 , and so on. These basic anionic building blocks can be further polymerized into zero-dimensional (0D) clusters, one-dimensional (1D) chains, two-dimensional (2D) layers, and even three-dimensional (3D) network structures, such as 0D clusters in Sr 4 (Te 3 O 8 )­Cl 4 , Rb­[Te 2 O 4 (OH) 5 ], CsYTe 3 O 8 , and Ba 2 V 4 O 8 (Te 3 O 10 ), 1D chains in BaLiTe 2 O 5 Cl, Y 2 (Te 4 O 10 )­(SO 4 ), Cd 7 Cl 8 (Te 7 O 17 ), and Nd 2 (MoO 4 )­(Te 4 O 10 ), 2D layers in Zn 4 (Te 3 O 7 ) 2 (SO 4 ) 2 (H 2 O), NdTe 2 O 5 Br, Ba 3 PbTe 6 O 16 , and RbNaTe 8 O 14 (OH) 6 ·8H 2 O, and 3D networks in Ag 3 F 3 (TeF 6 )­(TeO 2 ) 12 (Figure S1). Additionally, when Te IV is coordinated with F and O atoms simultaneously, new basic building blocks TeO 2 F, TeO 2 F 2 , and TeF 3 will be formed, such as the fluorotellurite groups in AgTeO 2 F, Bi 3 F­(TeO 3 )­(TeO 2 F 2 ) 3 , HgTeO 2 F­(OH), and BaF 2 TeF 2 (OH) 2 …”

Two Chiral YbIII Enantiomeric Pairs with Distinct Enantiomerically Pure N-Donor Ligands Presenting Significant Differences in Photoluminescence, Circularly Polarized Luminescence, and Second-Harmonic Generation

“…The SHG intensity of Yb- R -1 is also much larger than a multifunctional Zn II –Yb III enantiomer (0.2 × KDP), a 2D Ag(I) enantiomer (0.36 × KDP), and a pair of chiral Cu(I) coordination polymers (0.36 × KDP) and is slightly larger than an eight-coordinated Dy III enantiomeric pair (0.7 × KDP) . It is even larger than some SHG-active inorganic materials, such as K 2 [Te 3 O 8 (OH) 4 ] (0.6 × KDP), CsKB 8 O 12 F 2 ·CsI (0.6 × KDP), and K 2 ZnGe 2 O 6 (0.73 × KDP) . According to eq and χ R (2) = 0.39 pm V –1 for KDP, the second-order NLO susceptibilities ( χ S (2) ) of Yb- R -1 and Yb- R -2 are calculated to be 0.35 and 0.12 pm V –1 , respectively. χ S false( 2 false) = χ R false( 2 false) true( I S SHG I R SHG true) 1 / 2 χ S false( 3 false) = χ R false( 3 false) true( I S THG I R THG true) 1 / 2 The precursor Yb(tta) 3 (H 2 O) 2 only presents a strong THG response at λ = 517 nm (Figure S12) because it crystallizes in a centrosymmetric P 1̅ space group of the triclinic system .…”

“…The SHG intensity of Yb-R-1 is also much larger than a multifunctional Zn II −Yb III enantiomer (0.2 × KDP), 45 a 2D Ag(I) enantiomer (0.36 × KDP), 49 and a pair of chiral Cu(I) coordination polymers (0.36 × KDP) 86 and is slightly larger than an eight-coordinated Dy III enantiomeric pair (0.7 × KDP). 48 It is even larger than some SHG-active inorganic materials, such as K 2 [Te 3 O 8 (OH) 4 ] (0.6 × KDP), 87 CsKB 8 O 12 F 2 •CsI (0.6 × KDP), 88 and K 2 ZnGe 2 O 6 (0.73 × KDP). 89 According to eq 1 and χ R…”