Related Experiment Video
Updated: Sep 1, 2025

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
Published on: October 31, 2019
NaB3O4F(OH): A Hydroxyfluorooxoborate with One-Dimensional Chain Featuring Large Birefringence and Short Ultraviolet
Yu Dang1,2, Dongdong Chu1,2, Zhihua Yang1,2
1Research Center for Crystal Materials, CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, CAS, 40-1 South Beijing Road, Urumqi 830011, China.
Abstract:
A new sodium hydroxyfluorooxoborate, NaB3O4F(OH) (NBOFH), was discovered and synthesized. NBOFH features the unprecedented [B3O4F(OH)] infinite chain constructed by the novel fundamental building block (FBB) of [B3O5F(OH)]. NBOFH has a large birefringence of 0.097 at 1064 nm and short ultraviolet (UV) cutoff edge below 200 nm. First-principles calculations and response electron distribution anisotropy (REDA) were performed to explain the structure-property relationships. This work provides a novel strategy for the synthesis of deep-ultraviolet birefringent crystals and enriches the structural diversity of the emerging hydroxyfluorooxoborates.
Related Concept Videos
Hydroboration-Oxidation of Alkenes
Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Hybridization of Atomic Orbitals I
UV–Vis Spectroscopy: Molecular Electronic Transitions

