Photoluminescent lanthanide–organic
frameworks (Ln-MOFs)
were printed onto plastic and paper foils with a conventional inkjet
printer. Ln-MOF inks were used to reproduce color images that can
only be observed under UV light irradiation. This approach opens a
new window for exploring Ln-MOF materials in technological applications,
such as optical devices (e.g., lab-on-a-chip), as proof of authenticity
for official documents