title: Deep-Ultraviolet Nonlinear Optics in a Borate Framework with 21-Ring Channels.
abstract: A new borate LiBa3 (OH)[B9 O16 ][B(OH)4 ], which combines the uniform porosity of open-frameworks with the extraordinary NLO properties of borates, has been obtained under hydrothermal conditions by using mixed lithium and barium ions as templates. The framework displays an acs-type net with large 21-ring channels. The second harmonic generation (SHG) measurement shows that it is a type I phase-matchable material with a strong SHG signal intensity about 3.1 times that of KDP (KH2 PO4 ). UV/Vis-NIR diffuse reflectance analysis indicates that the compound has a wide transparency range with the short-wavelength absorption edge below 200 nm. These characteristics reveal that the compound is a promising deep-UV nonlinear optical material.
authors.affiliation: MOE Key Laboratory of Cluster Science, School of Chemistry, Beijing Institute of Technology, Beijing, 100081, P. R. China), Fax: (+86)10-6891-8572.
authors.forename: Qi
authors.initials: Q
authors.lastname: Wei
authors.affiliation: MOE Key Laboratory of Cluster Science, School of Chemistry, Beijing Institute of Technology, Beijing, 100081, P. R. China), Fax: (+86)10-6891-8572.
authors.forename: Jia-Jia
authors.initials: JJ
authors.lastname: Wang
authors.affiliation: College of Science, Hebei University of Science and Technology, Shijiazhuang, Hebei, 050018, P. R. China.
authors.forename: Chao
authors.initials: C
authors.lastname: He
authors.affiliation: Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang, 321004, P. R. China. jwcheng@zjnu.cn.
authors.forename: Jian-Wen
authors.initials: JW
authors.lastname: Cheng
authors.affiliation: MOE Key Laboratory of Cluster Science, School of Chemistry, Beijing Institute of Technology, Beijing, 100081, P. R. China), Fax: (+86)10-6891-8572. ygy@bit.edu.cn.|Department of Chemistry, Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong, 515063, P. R. China. ygy@bit.edu.cn.
authors.forename: Guo-Yu
authors.initials: GY
authors.lastname: Yang
keywords: UV nonlinear optics; borates; hydrothermal synthesis; oxoboron clusters; structure-property relationships