Chiral Inorganic Crystals Emitting Circularly Polarized Red Light (IMAGE)
Caption
Single crystals of potassium europium nitrate, K₃[Eu₂(NO₃)₉], grown from water by slow evaporation (a). Single-crystal X-ray diffraction reveals left- and right-handed chiral crystal structures (c, d). Under ultraviolet light, the crystals emit bright red circularly polarized luminescence (b), demonstrating that a purely inorganic bulk crystal can exhibit chirality-induced optical activity. This study opens new possibilities for the design of robust optical materials.
Credit
Inomata et al.
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License
CC BY