K<sub>2</sub>PbB<sub>5</sub>P<sub>3</sub>O<sub>17</sub>: A Mixed-Coordinated Borophosphate with Enhanced Birefringence Driven by the [B<sub>2</sub>O<sub>5</sub>] Unit
Mixed-coordinated borophosphates containing π-conjugated [BO<sub>3</sub>] and non-π-conjugated [BO<sub>4</sub>] and [PO<sub>4</sub>] tetrahedra have been a research hot spot benefiting from their diverse structures and the presentation of pre-eminent optical performances. Through the high-temperature solution method, a new mixed-coordinated borophosphate K<sub>2</sub>PbB<sub>5</sub>P<sub>3</sub>O<sub>17</sub> was synthesized. This compound exhibits an unprecedented [B<sub>5</sub>P<sub>3</sub>O<sub>21</sub>] fundamental building block consisting of apex-sharing [B<sub>3</sub>O<sub>7</sub>], [BO<sub>4</sub>], and [PO<sub>4</sub>] units, possessing a short ultraviolet cutoff edge of 234 nm as well as moderate birefringence (0.045@1064 nm). Compared with the tetra-coordinated borophosphate KPbBP<sub>2</sub>O<sub>8</sub> with the same elemental composition, the birefringence of K<sub>2</sub>PbB<sub>5</sub>P<sub>3</sub>O<sub>17</sub> achieves a great enhancement induced by the introduction of the planar [B<sub>2</sub>O<sub>5</sub>] unit.
Authors
- Xueling Hou (ORCID: https://orcid.org/0000-0003-3682-7387)
- Abudukadi Tudi (ORCID: https://orcid.org/0000-0002-3370-5205)
- Huanhuan Cheng
- Meng Cheng (ORCID: https://orcid.org/0000-0003-2169-7217)
Institutions
- Chinese Academy of Sciences (CN)
- Xinjiang Technical Institute of Physics & Chemistry (CN)
Publication Details
- Journal
- Inorganic Chemistry
- Published
- 2025-02-24
- DOI
- https://doi.org/10.1021/acs.inorgchem.4c05063
- Citations
- 4
- Primary Topic
- Crystal Structures and Properties
- Type
- article
- Field-Weighted Citation Impact
- 1.71
Funders
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- Science and Technology Department of Xinjiang Uyghur Autonomous Region