Angewandte Chemie International Edition · 2007 · 357 citations · 42 references
Natural SciencesChemistryPhysicsCrystal StructureInorganic ChemistrySpectroscopyCrystal ChemistryCrystallographyMolecular SymmetryPhotocatalysisPhotochemistryPhotochromic MaterialsChromophore PhotochemistryColor ReversionElectron DonorsOctahedral ComplexesPhotochromic Optical SwitchingPhotoinduced Structural ChangesSolid-state PhotochromismViologen-based Materials
Color scheme: Reversibly photochromic crystals of (MV)Bi2Cl8 (methyl viologen, MV2+: N,N′-dimethyl-4,4′-bipyridinium) show structural variations before and after UV irradiation. Color reversion is accomplished by heating in air (see picture). ([Bi2Cl8]2−)∞ double-octahedral chains serve as electron donors to in situ generated MV2+ dications.
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