Qiu Haotian, Li Fuming, Jin Congcong, Lu Juanjuan, Yang Zhihua, Pan Shilie, Mutailipu Miriding
CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, CAS, and 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.
Chem Commun (Camb). 2022 May 5;58(37):5594-5597. doi: 10.1039/d2cc01035f.
Although phosphates are a rich source of deep-ultraviolet optical materials, the realization of large optical anisotropy in them still remains a challenge because of the small polarizability anisotropy of [PO] units. Inspired by the fluoridation strategy and hydrogen bond interaction, a new metal-free monofluorophosphate, (NH)[HPOF], was synthesized, which exhibits a large birefringence (cal. 0.077) and wide band gap (∼6.51 eV). Such a large birefringence in (NH)[HPOF] sets a new record among available fluorophosphates, and the [HPOF] unit is theoretically confirmed to be a new birefringence-active unit.
尽管磷酸盐是深紫外光学材料的丰富来源，但由于[PO]单元的极化率各向异性较小，在其中实现大的光学各向异性仍然是一个挑战。受氟化策略和氢键相互作用的启发，合成了一种新型无金属单氟磷酸盐(NH)[HPOF]，它具有大的双折射（计算值为0.077）和宽带隙（约6.51 eV）。(NH)[HPOF]中如此大的双折射在现有氟磷酸盐中创下了新纪录，并且[HPOF]单元在理论上被证实是一种新的双折射活性单元。
