Scholarlink

<p>Optical phosphate crystals, including commercially available KH<sub>2</sub>PO<sub>4</sub>, are primarily limited by relatively low birefringence. To address this, strategies involving non-<i>π</i>-conjugated heteroanionic units, <i>π</i>-conjugated planar units, and lone-pair polyhedral units have been proposed to enhance birefringence. In this work, we propose an all-three-in-one design strategy that assembles three types of birefringent units, namely non-<i>π</i>-conjugated [H<sub>2</sub>PO<sub>4</sub>] heteroanionic units, <i>π</i>-conjugated [C<sub>2</sub>O<sub>4</sub>] planar units, and lone-pair [PbO<sub>8</sub>] polyhedral units, into the Pb<sub>2</sub>(H<sub>2</sub>PO<sub>4</sub>)<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>) structure, achieving a moderate birefringence of nearly 0.129@550 nm. Additionally, Sr<sub>2</sub>(H<sub>2</sub>PO<sub>4</sub>)<sub>2</sub>(C<sub>2</sub>O<sub>4</sub>) with a birefringence of 0.107@550 nm was also successfully synthesized for further investigating the distinctive contribution of lone-pair [PbO<sub>8</sub>] polyhedral units in enhancing birefringence. Notably, the birefringence values of both compounds are 3 and 3.6 times that of KH<sub>2</sub>PO<sub>4</sub>, substantially exceeding most reported phosphate birefringent crystals. First-principles calculations and structural analysis revealed that the significant birefringence is attributed to the contribution of birefringent units within the compounds. The integration of diverse functional structural units opens new possibilities for exploring materials.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

All-three-in-one: Pb2(H2PO4)2(C2O4) significantly enhanced birefringence in phosphate materials

  • 期刊论文

  • 发表日期：

    2025年5月28日

查看全文
  • Qingpeng Shao,
  • Qingran Ding,
  • Yanqiu Zhang,
  • Weiqi Huang,
  • Zihao Yu,
  • Yipeng Song,
  • Chengmin Ji,
  • Ziyi Wang,
  • Sangen Zhao,
  • Junhua Luo

摘要

Optical phosphate crystals, including commercially available KH2PO4, are primarily limited by relatively low birefringence. To address this, strategies involving non-π-conjugated heteroanionic units, π-conjugated planar units, and lone-pair polyhedral units have been proposed to enhance birefringence. In this work, we propose an all-three-in-one design strategy that assembles three types of birefringent units, namely non-π-conjugated [H2PO4] heteroanionic units, π-conjugated [C2O4] planar units, and lone-pair [PbO8] polyhedral units, into the Pb2(H2PO4)2(C2O4) structure, achieving a moderate birefringence of nearly 0.129@550 nm. Additionally, Sr2(H2PO4)2(C2O4) with a birefringence of 0.107@550 nm was also successfully synthesized for further investigating the distinctive contribution of lone-pair [PbO8] polyhedral units in enhancing birefringence. Notably, the birefringence values of both compounds are 3 and 3.6 times that of KH2PO4, substantially exceeding most reported phosphate birefringent crystals. First-principles calculations and structural analysis revealed that the significant birefringence is attributed to the contribution of birefringent units within the compounds. The integration of diverse functional structural units opens new possibilities for exploring materials.