Photochromic Metal‐Organic Frameworks Based on Host‐Guest Strategy and Different Viologen Derivatives for Organic Amines Sensing and Information Anticounterfeiting

Abstract The encapsulation of viologen derivatives in metal‐organic frameworks (MOFs) to construct host‐guest materials has been widely discussed owing to their distinctive spatial arrangement and physical/chemical properties. Herein, three new photochromic MOFs ( NWM‐1–3 ) have been successfully synthesized by 1,1,2,2‐Tetra(4‐carboxylphenyl)ethylene (H 4 TCPE) ligand as well as three different viologen derivatives based on host‐guest strategy. Remarkably, NWM‐1–3 exhibit a notable reversible photochromism change from yellow to green under 365 nm UV irradiation. The distance between the electron‐deficient N atom in the viologens and the electron‐rich carboxylate oxygens satisfies the electron transfer (ET)…

• NN
  National Natural Science Foundation of China

  Awards: 22371225, 22071194