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The phosphate buffer system is a critical biological mechanism for maintaining pH stability in the body. This system operates primarily through two components: sodium dihydrogen phosphate (NaH2PO4), which acts as a weak acid, and sodium hydrogen phosphate (Na2HPO4), which serves as a weak base.
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Structural insights into three phosphates with distinct polyanionic configurations.

Jun Sun1, Hongping Wu2, Miriding Mutailipu1

  • 1CAS 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. miriding@ms.xjb.ac.cn slpan@ms.xjb.ac.cn and Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.

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|August 22, 2019
PubMed
Summary
This summary is machine-generated.

Three novel mixed-metal phosphates were synthesized and characterized, revealing unique polyanionic structures. One compound, K2SrP4O12, exhibits potential as a nonlinear optical material for UV applications.

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Area of Science:

  • Solid-state chemistry
  • Materials science
  • Crystallography

Background:

  • Mixed-metal phosphates are versatile materials with diverse structural and functional properties.
  • Understanding the relationship between structure and properties is crucial for designing new functional materials.

Purpose of the Study:

  • To synthesize and characterize novel mixed-metal phosphates.
  • To investigate their structural features, thermal stability, and potential nonlinear optical properties.

Main Methods:

  • High-temperature solution method for synthesis.
  • Single-crystal X-ray diffraction for structural characterization.
  • Thermal analysis (TGA/DSC) for stability assessment.
  • Infrared spectroscopy for vibrational analysis.

Main Results:

  • Three compounds synthesized: LiSrP3O9 (centrosymmetric), LiCsP2O6 (centrosymmetric), and K2SrP4O12 (noncentrosymmetric).
  • Distinct polyanionic configurations observed: [PO3]∞ chains in LiSrP3O9 and [P4O12]4- rings in LiCsP2O6 and K2SrP4O12.
  • K2SrP4O12 exhibits a moderate second harmonic generation (SHG) response (0.6 times that of KH2PO4).
  • LiSrP3O9 and K2SrP4O12 show high thermal stability up to 659 °C and 698 °C, respectively.

Conclusions:

  • The study successfully synthesized and characterized three new mixed-metal phosphates with diverse structural motifs.
  • K2SrP4O12 shows promise as a nonlinear optical material for the ultraviolet spectral region.
  • The synthesized compounds demonstrate good thermal stability, indicating their potential for practical applications.