Hierarchically responsive and photochromic imidazopyridazinium iodoargentate hybrid materials

Three iodoargentate hybrids, [MIPDz]2[Ag2I4] (1), [AIPDz][Ag2I3] (2), and [MIPDz]2[Ag5I7] (3) (MIPDz+ = methylimidazopyridazinium, AIPDz+ = acetonylimidazopyridazinium), have been successfully synthesized. Three iodoargentate hybrids exhibit improved photochromic properties and hierarchically responsive mechanism from optically inert response to photolysis of iodoargentates, until photoinduced intermolecular electron transfer with Ag particles as secondary electron donor.266