An Ultraviolet Nonlinear Optic Borate with 13-Ring Channels Constructed from Different Building Units

Abstract

Under solvothermal conditions, a chair open-framework borate, NaBO(HO)(HO) (1), has been synthesized. Compound 1 shows regular pores of zeolites as well as nonlinear optical (NLO) properties of borates. The large 13-ring channels of the boron oxide framework are constructed from different cluster units of BO and BO with three-ring units. The second harmonic generation (SHG) signal intensity of 1 is similar to that of KHPO (KDP) and gradually increased with larger particle size. Compound 1 is a potential UV NLO material for its short wavelength absorption edge.

Sn2B5O9Br as an Outstanding Bifunctional Material with Strong Second‐Harmonic Generation Effect and Large Birefringence

“…Because the B atom can be either three‐ or four‐coordinated to form a BO 3 triangle or a BO 4 tetrahedron, these B–O groups further link together by corner‐sharing or edge‐sharing to create numerous structures which contribute to super function. [ 3 ] After much effort, some outstanding NLO borate materials have been reported such as LiB 3 O 5 , [ 4 ] β‐BaB 2 O 4 , [ 5 ] CsLiB 3 O 5 , [ 6 ] and Sr 2 Be 2 B 2 O 7 , [ 7 ] which exhibit strong second harmonic generation (SHG) response. Meanwhile, several large birefringence borate materials have been discovered, for instance α‐BaB 2 O 4 , [ 8 ] Ba 2 Ca(B 3 O 6 ) 2 , [ 9 ] and Ca(BO 2 ) 2 , [ 10 ] which enable the balance between band gap and birefringence.…”

K2Na3[{B6O10(OH)}{B3O4(OH)3}] ⋅ H2O: A Layered Borate Built by Mixed Oxoboron Clusters with Nonlinear‐Optical Property

“…Cluster‐bridging linkages from layers to frameworks are more benefit to form acentric structures, as evidenced by Ba 3 M 2 [B 3 O 6 (OH)] 2 [B 4 O 7 (OH) 2 ] [9c] (M=Al/Ga, Figure 2e) and Ba 4 Ga[B 10 O 18 (OH) 5 ] [9d] (Figure 2f), two opposite orientated [MB 3 ] (M=Al/Ga) layers are bridged by B 4 O 7 (OH) 2 and B 7 O 11 (OH) 4 cluster (two BO 4 ‐sharing B 4 O 7 (OH) 2 ), respectively. Except for these allumino‐/gallo‐borates, in Na 2 B 9 O 15 (H 2 O)(H 3 O) [7c] (Figure 2g), B 6 O 13 clusters first make 2D layers with same orientations and are further bridged by B 3 O 7 ‐based cluster chains, forming to 3D chiral framework. Up to date, only porous‐layered Na 2 K 3 [B 17 O 26 (OH) 4 ] [7f] built by B 6 O 12 (OH)‐based cluster layers and B 5 O 8 (OH) 2 bridging clusters, exhibits CS structure.…”

“…Generally, due to the diverse coordination modes of different oxoboron clusters, mixed oxoboron cluster SBUs will contribute to more complex and novel structures than that of single oxoboron cluster SBU. However, limited mixed oxoboron cluster‐made borates are NCS structures, including Na 6 B 13 O 22.5 , Ba 2 [B 6 O 9 (OH) 2 ][B 3 O 3 (OH) 4 ] ⋅ (OH) ⋅ 4H 2 O, Ba 3 M 2 [B 3 O 6 (OH)] 2 ‐[B 4 O 7 (OH) 2 ] (M=Al/Ga), Ba 4 Ga[B 10 O 18 (OH) 5 ] and Na 2 B 9 O 15 (H 2 O)(H 3 O) [7c,9] . Design and synthesis acentric borates with mixed oxoboron clusters is desirable, which will combine borates’ advantages in structural novelty and excellent optical property.…”

Спектроскопическое исследование структурных и магнитных свойств TbCr-=SUB=-3-=/SUB=-(BO-=SUB=-3-=/SUB=-)-=SUB=-4-=/SUB=-

“…С точки зрения коммерческого использования, бораты обладают наибольшим потенциалом для применений в качестве новых оптических материалов, они являются нелинейно-оптическими средами для источников ультрафиолетового (УФ) и глубокого УФ излучения [2,[4][5][6], двулучепреломляющими материалами [11] и активной средой лазеров с самоудвоением и самосмешением частот [12]. Многие бораты имеют нецентросимметричные структуры, широкие окна прозрачности, хорошую химическую стабильность, механическую прочность [2,[4][5][6][13][14][15] [29][30][31], активированные редкоземельными (РЗ) ионами, могут быть использованы в качестве активных сред для лазеров.…”