Direct Access by Mechanochemistry or Sonochemistry to Protonated Merocyanines: Components of a Four‐State Molecular Switch

Chemistry

• Mechanochemistry 100%
• Sonochemistry 100%
• Optimization 50%
• Base 50%
• Crystallography 50%
• 1H NMR Spectroscopy 50%
• Photochromism 50%
• Atomic Absorption Spectroscopy 50%
• Condensation Reaction 50%
• Acidic Condition 50%
• Salicylaldehyde 50%
• Iodide Salt 50%