Jin Congcong, Li Fuming, Cheng Bingliang, Qiu Haotian, Yang Zhihua, Pan Shilie, Mutailipu Miriding
CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi, 830011, China.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.
Angew Chem Int Ed Engl. 2022 Jul 25;61(30):e202203984. doi: 10.1002/anie.202203984. Epub 2022 Jun 2.
Polarization modulation of deep-UV light is of significance to current technologies, and to this end, the birefringent crystal has emerged as an invaluable material as it allows for effective light modulation. Herein, a double-modification strategy driven by F and OH anions that makes double effects towards the critical property enhancement of deep-UV birefringent crystals is proposed. This leads to a new hydroxyborate (NH ) [B O F (OH) ] with giant cluster as a deep-UV birefringent crystal with large birefringence (Δn =0.12@546.1 nm). This birefringence is a record among inorganic hydroxyborates with experimentally measured birefringence. Structural analysis shows that the near-plane arrangement of [B O F (OH) ] cluster is responsible for the large optical anisotropy. Theoretical calculations indicate that its π-conjugated [BO ] and [BO OH] units are the main source of this large optical anisotropy.
深紫外光的偏振调制对当前技术具有重要意义，为此，双折射晶体已成为一种非常有价值的材料，因为它能够实现有效的光调制。在此，提出了一种由F和OH阴离子驱动的双重改性策略，该策略对深紫外双折射晶体的关键性能增强具有双重作用。这导致了一种新的羟基硼酸盐(NH ) [B O F (OH) ]，它作为一种具有大双折射(Δn =0.12@546.1 nm)的深紫外双折射晶体，具有巨大的簇结构。这种双折射在通过实验测量双折射的无机羟基硼酸盐中是创纪录的。结构分析表明，[B O F (OH) ]簇的近平面排列是产生大光学各向异性的原因。理论计算表明，其π共轭的[BO ]和[BO OH]单元是这种大光学各向异性的主要来源。
