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Area of Science:

  • Solid-state chemistry
  • Materials science
  • Photophysics

Background:

  • Developing green and efficient methods for solid-state structure and property control is challenging due to bond manipulation difficulties.
  • Existing strategies often lack efficiency or environmental friendliness.

Purpose of the Study:

  • To achieve rubbing-induced photoluminescence in solid-state ortho-pyridinil phenol derivatives.
  • To explore a novel mechanism for solid-state property modulation.

Main Methods:

  • Investigated the triboelectric effect of rubber to generate a negative charge.
  • Explored topochemical tautomerism triggered by the triboelectric charge in double H-bonded dimeric structures.
  • Analyzed changes in photoluminescence properties before and after rubbing.

Main Results:

  • Successfully induced photoluminescence in solid-state ortho-pyridinil phenol compounds via rubbing.
  • Demonstrated a triboelectric charge-induced proton transfer leading to a bright-form tautomer.
  • Observed a significant increase (over 450-fold) in fluorescent quantum yield.
  • Confirmed the reversibility of the tautomerism, enabling repeated use.

Conclusions:

  • Rubbing-induced topochemical tautomerism is a viable strategy for modulating solid-state photoluminescence.
  • This reversible process offers potential for encrypted applications and the design of new smart materials.
  • The method provides a green and efficient approach to solid-state material property control.