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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
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Binary Lead Fluoride Pb3 F8.

H Lars Deubner1, Malte Sachs1, Jascha Bandemehr1

  • 1Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str. 4, 35032, Marburg, Germany.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|September 24, 2019
PubMed
Summary

Researchers synthesized the binary lead fluoride Pb3F8 using anhydrous HF or BrF3. Characterization confirmed its structure and electronic properties, offering insights into mixed-valence compounds.

Keywords:
IR and Raman spectroscopyNEXAFSNMR spectroscopylead fluoridequantum chemical calculations

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Area of Science:

  • Inorganic Chemistry
  • Solid-State Chemistry
  • Materials Science

Background:

  • Binary lead fluorides are of interest for their unique structural and electronic properties.
  • Understanding mixed-valence compounds is crucial for developing advanced materials.

Purpose of the Study:

  • To synthesize and characterize the binary lead fluoride Pb3F8.
  • To investigate the structural, vibrational, and electronic properties of Pb3F8.
  • To provide theoretical insights into the mixed-valence nature of the compound.

Main Methods:

  • Synthesis via reaction of anhydrous HF with Pb3O4 or BrF3 with PbF2.
  • Characterization using single-crystal and powder X-ray diffraction, IR, Raman, and solid-state MAS 19F NMR spectroscopy.
  • Thermogravimetric analysis, XP, and NEXAFS spectroscopy.
  • Solid-state quantum-chemical calculations for vibrational analyses and band assignments.

Main Results:

  • Successful synthesis of the binary lead fluoride Pb3F8.
  • Comprehensive structural and spectroscopic data confirming the compound's identity.
  • Detailed analysis of vibrational modes and electronic band structure.
  • Evidence of a mixed-valence state within the compound.

Conclusions:

  • Pb3F8 is a novel binary lead fluoride with a defined crystal structure.
  • Spectroscopic and computational data elucidate its vibrational and electronic characteristics.
  • The study provides fundamental insights into mixed-valence lead fluoride systems.