具有独特手性层的 UV 非线性光学晶体 Ba2[B6O9(OH)4]，基于 BO3 和 BO4 单元的新型 B18O42 圆。
UV nonlinear optical crystal Ba2[B6O9(OH)4] featuring unique chiral layers with a new B18O42 circle based on BO3 and BO4 units.
机构信息
Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, 40-1 South Beijing Road, Urumqi 830011, China.
出版信息
Inorg Chem. 2012 Feb 6;51(3):1852-8. doi: 10.1021/ic2021337. Epub 2012 Jan 19.
A new noncentrosymmetric polyborate, Ba(2)[B(6)O(9)(OH)(4)], has been synthesized under a hydrothermal condition. The polyborate contains chiral layers constructed by two kinds of helical chains and also form new B(18)O(42) circles based on B(3)O(8) units [(3: Δ+2T)]. One kind of Ba atom locates in the cavity surrounded by the B(11)O(11) ring within the anion layer, and the other kind of Ba atom inserts between two adjacent layers. UV-vis diffuse reflectance spectroscopy demonstrates that the compound has a cutoff edge below 190 nm and has a large second-harmonic generation (SHG) effect, which is approximately 3 times that of KH(2)PO(4) (KDP) and is type-I phase matchable.
一种新的非中心对称多硼酸盐 Ba(2)[B(6)O(9)(OH)(4)]，在水热条件下合成。多硼酸盐包含由两种螺旋链构成的手性层，并且还基于 B(3)O(8)单元 [(3: Δ+2T)]形成新的 B(18)O(42) 环。一种 Ba 原子位于由阴离子层内的 B(11)O(11)环包围的空腔中，另一种 Ba 原子插入两个相邻层之间。紫外-可见漫反射光谱表明，该化合物在 190nm 以下具有截止边缘，并且具有较大的二次谐波产生 (SHG) 效应，约为 KH(2)PO(4) (KDP)的 3 倍，是Ⅰ型相匹配的。
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