Vanadium oxide oxidation states binding energy -- unequal spacing

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SUMMARY

The discussion focuses on the unequal binding energy gaps observed in the oxidation states of vanadium oxide as measured by X-ray Photoelectron Spectroscopy (XPS). The specific binding energies noted are 513.0 eV for V2+ (VO), 515.6 eV for V3+ (V2O3), 516.0 eV for V4+ (VO2), and 517.1 eV for V5+ (V2O5). The disparity in binding energy is attributed to the differing chemical environments of each oxidation state, which directly influences their electronic properties.

PREREQUISITES
  • X-ray Photoelectron Spectroscopy (XPS) fundamentals
  • Understanding of oxidation states in transition metals
  • Knowledge of vanadium oxide compounds
  • Basic principles of chemical environments and their effects on binding energy
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  • Research the principles of X-ray Photoelectron Spectroscopy (XPS) in detail
  • Study the electronic structure of vanadium oxides and their oxidation states
  • Explore the effects of chemical environments on binding energy in transition metals
  • Investigate other transition metal oxides and their binding energy characteristics
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Chemists, materials scientists, and researchers focused on surface analysis and electronic properties of transition metal oxides.

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Hello,
How come in XPS the binding energy gaps between oxidation states of vanadium oxide are not equally spaced? Is there a reason they are not all equally spaced?
Hello, How come in XPS the binding energy gaps between oxidation states of vanadium oxide are not equally spaced? Is there a reason they are not all equally spaced? V2+ (VO) 513.0 eV V3+ (V2O3) 515.6 eV V4+ (VO2) 516.0 eV V5+ (V2O5) 517.1 eV Many thanks
 
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Why would you expect them to be equally spaced? They’re in different chemical environments.